In a couple of days, a large meteor will pass between the Earth and the Moon’s orbit. The Asteroid named 2005 YU55 is 400 meters long and at its closest point will pass 325,000 kilometers from the Earth traveling 13 km/s (30,000 mph).
The Impact Earth website allows you to calculate the impact of various asteroids if they were to hit the Earth. In this case if the YU55 did hit Earth we could expect the equivalent of 8.49 x 1018 Joules = 2.03 x 103 Megatons TNT or a 6.8 size earthquake. If it hit the deep ocean, 45-meter Tsunami waves between 2.3 meters (7.6 feet) and 45.7 meters (150 feet) would be expected. But you will be happy to know that the average interval between impacts of this size somewhere on Earth during the last 4 billion years is 1.1 x 105years (and if you need a brush up on your scientific notation, just move the decimal point five space to the right so it is 110,000 years). And just to be precise about the vocabulary, when it is traveling in our solar system it is an asteroid, but when it crashes through our atmosphere and breaks up into pieces that hit the Earth, they become meteorites.
Impact Earth data for 400 m Asteroid
It is interesting to use Impact Earth to see the effects of various size asteroids on the Earth. Indeed, student exploration will allow them to realize some of the parameters that will affect the collision including speed, density of asteroid, and angle of impact. The Impact Earth calculator is a good start but it leaves me a bit flat. No matter what size Asteroid, the impact animation is always the same. The depicted size of the asteroid should resemble the number that was entered. But the data are useful, and students could ask and answer many questions about asteroid impact, producing deeper asteroid understanding and inquiry skills.
Famous Asteroids from Adaptive Curriculum Animation
(A guest post by Seth. R. Hawkins, Besteiro Middle School)
Teacher: “Class, today we’re going to learn another important feature of the Moon called an eclipse.”
Female Student: “I love Eclipse! Edward is so hot!”
Male Student: “Oh sir, I hate that show. I wish I had a stake for that…”
Teacher: “No, no, wait! Not the movie ‘Eclipse.’ I’m talking about the scientific phenomenon in which either the Sun or the Moon seem to temporarily disappear.”
(Cue disappointed groan from entire female class population…)
Going into this lesson, I knew I couldn’t compete with a vampire that shimmers and a werewolf with abs that make washboards jealous, so getting my students to focus on the interactions of the Sun, Earth and Moon during solar and lunar eclipses was going to be a challenge. It’s not that eclipses are boring – quite the opposite – but they are definitely a concept that seems very abstract unless they are seen in person. Since I don’t have time to wait for June and July to view a lunar and solar eclipse respectively, I knew I had to find some way to model this for my students. Of course, the day I wanted to do this demo I couldn’t find my globe and my flashlight was dead. No worries, a teacher anticipates these little problems. I turned to my reliable friend Adaptive Curriculum and was thrilled to find a module on lunar and solar eclipses.
While I have a computer lab in my classroom, I opted to do this activity as a class, hoping to generate some discussion and clear up any misconceptions before they became firmly rooted.
My class is very familiar with Adaptive Curriculum. We do a module about once a week. When I told them we were going to use Adaptive Curriculum, they gave the obligatory “I’m a middle-school student and I’m going to complain about this even though I really don’t mind doing it” groan – you know the one I’m talking about – but any apprehension quickly melted away when they saw what the eclipse module had to offer. My students were instantly transfixed by the animated explanation of various cultures’ beliefs in the meaning of eclipses and were even more interested in the lab-like setting presented in the module.
Learners manipulate models of the Earth-Moon-Sun system to observe eclipses.
Using the SmartBoard, we first modeled the solar eclipse. By manipulating the variable of the distance of the moon between the Earth and Sun, my students clearly saw the result on Earth. By changing camera views, they saw how the eclipse appeared on Earth. The ensuing questions provided by the module were perfectly aligned with what I would have asked myself. We repeated the process for the lunar eclipse with similar success.
Not entirely sure how well my students grasped the concept, I headed into the quiz. After the quick, five-question quiz, I was amazed at how well my students had mastered solar and lunar eclipses. I remember how monumental a challenge teaching this concept had been last year and I never felt my students understood eclipses at a level I expected of them. No problem this year. While I attribute much of that to an especially bright group of students, I know the way Adaptive Curriculum presented eclipses was in a way that was easy to understand and remember. As I asked follow-up questions, my students answered them by referring to the demo in the module.
As a teacher, Adaptive Curriculum is an invaluable asset. Not only does it keep my students engaged and on task, it also hits the objectives I want covered. I especially appreciate how Adaptive Curriculum makes a focus to incorporate process skills that students constantly need to practice.
Another benefit of Adaptive Curriculum is in its modeling of labs. Labs can be expensive, time-consuming to prepare and clean up, and aggravating when students don’t follow procedures. While there is nothing that can replace the experience of an actual lab, Adaptive Curriculum provides many safe and secure lab experiences in which students can manipulate variables and quickly and accurately measure results. Now what’s more scientific than that? Even a vampire would agree.
About the Author:
Mr. Hawkins and his students dissecting a frog.
Seth Hawkins is a 7th and 8th grade science teacher at Besteiro Middle School of Brownsville Independent School District in deep subtropical South Texas. A member of Teach for America, Mr. Hawkins came to Texas to help students realize and achieve their full potential. A self-proclaimed tech guru, Mr. Hawkins enjoys everything technology and also teaches Technology Applications and Web Design courses. When he manages to squeeze away from the classroom, Mr. Hawkins enjoys spending time with his beautiful wife and brilliant daughter. Questions or comments can be sent to him at srhawkins@bisd.us
Almost 25 years ago, Presenter for the Macintosh II was the start of a revolution in presentations, in much the same way that word processing was a revolution in writing. Later, Microsoft bought Presenter and renamed it PowerPoint. The advantages for well-done presentations with PowerPoint are evident. With the popularity, however, there are critics and unengaged audiences. To be fair, it isn’t necessarily PowerPoints fault that a presentation is bad. PowerPoint Bullets don’t kill people; people kill people. It is the case, however, that the omnipresence of PowerPoints means that students won’t be excited just because the room goes dark and a PowerPoint is being shown.
The hottest name in science presentations is Prezi, which creates a non-linear way to depict concepts and multimedia. Prezi calls itself “the zooming presentation editor,” which captures part of it but it really should be called an “animated zooming presentation creator.” The really engaging part is how it zooms to different parts. Take this Prezi presentation that is designed to be an introductory lesson on physics. You can’t appreciate how cool the zooming works until you see Prezi in action. You fly about the word Physics as students are brought to topics they will learn throughout the year.
A Prezi presentation introducing physics.
Great teachers view the world and wonder how can I use this in my teaching. There are teachers who see a tool and instantly think about how they can use it to present science better. Then, there are those that instantly think about how they can put it into students’ hands so they can use it to learn science. Check out this Prezi, which is designed to present info for students to do a “Solar System Prezi-tation.”
Prezis are kept on the internet, so you can access other teacher-created science prezi-tations. Hopefully, they will categorize their site but for now you can do a keyword search. I did a search for “photosynthesis” and found 650 presentations. You can easily have your students go to these websites. I like Adaptive Curriculum because you can embed internet resources with the assigned Activity Objects.
A lesson plan from Adaptive Curriculum includes Activity Objects and Internet resources.
Further, if you believe in the importance of concept mapping in science education (as I do), then Prezi is a great tool for this as well. You can present teacher created or student created concept maps (see below).
But if you are going to Prezi, you better get their quick. This tool will grow in popularity until one day students might say, “I keep getting motion sickness in all my classes from Prezi. Can we please go back to PowerPoints?”
The videos on television show some of the massive destruction and the human toll of the recent earthquake in Haiti. It is difficult to imagine the suffering of the Haitian people. It is an unfortunate example of the devastation of a magnitude 7 earthquake.
It is natural to wonder why or how. When students are ready, teachers may want to discuss earthquakes and their causes.
The folks at IRIS have a website with a PowerPoint presentation and Quicktime movie that explain a lot of details associated with this particular earthquake and earthquakes in general. The PowerPoint has excellent pictures of the destruction to buildings, without presenting images of human suffering that would be difficult for some students. The image to the right is taken from the PowerPoint.
IRIS (AKA the Incorporated Research Institutes for Seismology) has lots of resources for learning about earthquakes including SeisMac 2.0 which allows Macintosh computers to become seismographs.
In the quest for Science Literacy, we strive to give students an understanding of natural events before they happen. Adaptive Curriculum has two strong Activity Objects, one is on determining the magnitude of an earthquake and the other is determining the location of the earthquake. The image below is from “Earthquakes: Measuring Magnitude.“
I had the good fortune last week of being a conference presider for Irfan Kula, a talented educational designer. His session was “I Love Symbiosis.” He emailed me his PowerPoint presentation, and I am presenting this here: i-love-symbiosis-kula.
I have the good fortune to be in beautiful Austin, Texas today for the Texas Computer Education Association’s (TCEA) annual convention. Austin is a delightful city, and this conference is huge. In a couple of hours I am going to be doing my presentation “Critical Thinking and TEKS Science Content Via Online Activities.”
I am placing the PowerPoint file here for participants and anyone else interested in this topic. Below are some titles and resources from the presentation.
demonstrate basic relationships between force and motion using simple machines including pulleys and levers (TEKS: 7.6)
http://2dboy.com/games.php
Creature Creator
prelude to Spore
Free trial edition
How can students making creatures
Develop science content?
Develop critical thinking?
Or both?
Adaptive Curriculum Activity Objects
Dancing with the Bees
TEKS 6.12: responses to external stimuli
Determining Planet Layers from Seismic Waves
TEKS 6.6 identify forces that shape features of the Earth; 7.2: organize, analyze, make inferences, and predict trends from direct and indirect evidence
Groundwater
TEKS 6.1: make wise choices in the use and conservation of resources; 6.14 groundwater
Using gooey balls, in the “World of Goo,” to make towers and bridges is an engaging way to build conceptual ideas in physics, engineering, and chemistry. The game made by a team of two guys (Kyle Gabler and Ron Carmel) at “2D Boy” won the Innovation Award and Technical Excellence Award at the Independent Games Festival. Goo is available for PCs, Macs, and the Wii. IGN named Goo the best Wii game of the year.In my house, the free trial download version of Goo won the “Win Over the Skeptical 11 Year-Old Award” for totally engaging my son—who proclaimed, “This is addicting!” My eight-year old son called it “very fun.”
That shows the power of Goo. A game that requires no instructions, but you proceed from level-to-level building things to transport the living goo balls. There is something satisfying about building the goo structures, and something powerful about completing the puzzle at each level. Okay, the goo ball creatures and game remind me a bit of the Zoombinis, and the puzzle contexts are not the greatest, but building the structures to solve the puzzle is intriguing and satisfying. And who wants to waste time learning elaborate storylines when there are goo structures to build?
In my trial of the free on-line sample, I built towers and then bridges. Then my 11-year old son took over, starting anew, and quickly blazed past me to get to build balloon structures to help fight gravity. Neither of us met the minimal goo ball rescue at the “Impale Sticky” level, but fortunately we were able to skip this level when we were left a few balls short.
Building a goo structure is difficult to describe but easy to do. You pull one of the goo balls and separate it from the structure. Two or three white “lines of force” (my term not theirs) appear and when you stop pulling it, the white lines become goo links joining the ball to the previous structure. Of course there is a lot of jiggling and the pull of gravity is evident. If you pull a ball too far away from the others, the lines of force disappear and you realize you need to put it closer.
Science Education and Goo
Linking goo balls forms triangular tresses, which are important units of engineering design. Through trial-and-error learning, we experience that triangle goo formations are easy to build and stable. It is a nice contrast, because it seems in the world of play (from Lincoln Logs™ to Legos™), rectangular formations dominate. The tresses are then used to build towers, bridges, and dangling structures. There is a nice science (and international touch) in the use of metric measurements such a “you have 4.4 meters to go.”
The physics of Goo feels pretty real, and this can be a bridge to many physics concepts. As you build structures, the notions of a good foundation and center of gravity come into play. Build it one way too far, and it falls down; keep the center of gravity above the base, and the tower rises. There is also a sense of harmonics/resonance/vibration in that if your structure starts to bend and bob, you have to be careful that your additions don’t cause more of this in an undesired direction.
At some higher levels of Goo, buoyancy comes into play, along with levers and moments, as balloons lift up lever arms. When this is applied to building a bridge, the balloon placement is critical because too much lift or too little gets the balloons popped. Placing the balloon closer or further from the pivot point can decrease or increase the lift.
For chemistry, the most obvious notion is the idea of adhesion and cohesion. Goo balls being attracted to other goo balls is cohesion. When they stick to something else, like the level where you have to climb up out of a canyon and make them stick to the walls, you have adhesion.
How do you Goo?
If you are teaching an engineering class, I think you have good justification to buy a class set of the “World of Goo.” I also think this would make a great addition to the computers of an elementary school computer lab. I can imagine Mr. Cosgrove (my fifth grade teacher) saying: “After you finish your graphs, if you have time you can Goo.” But for stepping softly into the “World of Goo,” give your students an extra-credit assignment to download the free version (link) at home and complete a certain number of levels. They can use screenshots to prove (and display) their work.
Edu-Goo
Winning awards is great and selling lots of this game must be pretty exciting to the creators. But I think the next endeavor should be an Edu-Goo product line. The possibilities are endless so I will just name three: (a) Online competitions between classes, schools, or the world to see who can build the Goo bridge to support the most weight, (b) three-dimensional Goo structures so students can explore using triangular versus rectangular tresses, (c) DNA Goo, where students can construct DNA double helix molecules. Less exciting but useful are worksheets that can guide exploration and discovery. Edu-Goo could have a teacher contribution page so teachers can contribute ideas about educational uses of Goo.
Living just north of Phoenix, we get the warm sunny 70° January weather, but we can drive 100 miles to the north to play in snow. Snow takes on a reverent beauty when you are just visiting it, playing in it, and having the air full of thick, downy flakes. When it makes unwanted intrusions, such as when I lived in New York, Ohio, and Iceland, it becomes more difficult to appreciate.
To the right you will see some snow fun pictures from our snow play in Flagstaff yesterday. It is interesting to see the evolution of “sledding”. Even in my childhood, toboggans were on their way out. Wooden sleds with two rails and a steering bar, like the Flexible Flyer, ruled the hills. I didn’t even see one of these on the hills.The disc or flying saucer seems to be waning.The flexible-foam, body length “sled” is the new king of the slopes. But what slides down the snow best?
The “coefficient of friction” (COF) is used to express the amount of friction between surfaces and this is proportional to the force pushing the surfaces together, or the weight of the rider and sled on the snow. The greater the COF the more friction there is. The COF for not-yet moving surfaces (static friction) is greater than sliding surfaces (kinetic friction). Engineers have measured different COFs (link). For instance, the kinetic COF for leather on oak is 0.52 and for those interested in glass-on-glass action, the kinetic COF is 0.4. Google has enlightened me. I had no idea there was so much research done on snow, and that there is a vibrant field called “snow engineering”, which might be called the ultimate snow job. Without going too deep into it, the COF for a moving skier (ski on snow) was analyzed to be between 0.01 and 0.3. I’d have to think that metal on snow would be a lower COF than foam on snow. It is good to think about, and students could do some fun experiments to find out.
Virtual science experiences must engage students and must have rich interactions. If it is just a Flash animation, I am not ready to call it an “experience” when the term video is much more suitable. If a teacher is going to bring laptop carts into a room or sign up weeks ahead for the computer lab, they should have computer-learning experiences that feature an engagement, a significant interaction, a closure, and multiple means of assessment.
“Sliding on Different Surfaces,” an Activity Object by Adaptive Curriculum, features these aforementioned characteristics. For an engagement, students play a game where they steer a sled down a hill while encountering different types of surfaces. If they steer over the surfaces with the least amount of friction, they will go faster. They receive a score based upon how well they did.
In the student interaction, students are in an office. They slide a pencil case across a desk and then mark the distance. Their mission is to find different things in the room such as a towel, newspaper, and sandpaper (obviously a rough office) and see how the pencil case sliding distance varies. (Elearning Physics Preview)
This elearning physics experience moves forward to an explanation of friction and factors that influence friction. There is an optional paper-and-pencil activity sheet that students can complete as they do the Activity Object, with two questions to be answered when they are finished.The activity sheets promote writing and become a permanent record of their learning for their science notebooks. If a teacher has a projector or interactive whiteboard and is doing a whole class lesson, the activity sheet is even more essential.
After the closure, students move onto the multiple-choice assessment, where they answer five questions and receive instant feedback about their learning. Teachers can log in to access student scores for the assessment. They can also see how long students took doing the Activity Object.If students are up for a bit of gaming, with their new understanding of friction, they can go back to the game and improve their time.
I did the Activity Object and played the game, and I observed that compared to my 8 and 11 year old sons, my sled in Flagstaff went much farther than their sleds. I would like to think that this was because I selected the patches of snow with the least friction and thus I picked up more speed. But these foam “sleds” are not very steerable and so, unfortunately, I have to consider the competing hypothesis that since my mass is a wee bit more than my sons (well okay, actually my weight is about 50 pounds more than both of them together), this may have had an influence. Since momentum is equal to mass x velocity, my momentum should be much greater than my sons’, and thus it would take longer to bring me to a stop. An impulse (force x time) can change the momentum of an object. Since my momentum is much bigger, and assuming that friction is about the same, I coast longer and thus farther.
But I think I will choose the happier hypothesis – that my greater knowledge of friction, rather than greater weight, made me go farther. Which just goes to show the subjective side of science after a happy family day in the snow.
When we add technology to our repertoire of science activities, the best uses are for areas that allow students to do things that they could not do before. A simulation that allows students to explore falling objects with different forces of gravity, like Adaptive Curriculum’s “Free Fall”, extends learning beyond the walls of a classroom.
In a similar way, the best probeware allows students to discover things beyond the ordinary science classroom. So, if a school only had a budget for one probe, I recommend that it not be a thermometer, pH, or voltage probe, but rather, PASCO’s Passport motion sensor. Combined with PASCO’s EZ-Screen, this product is so much fun that instead of selling soda to get supply money, a science teacher could charge students a quarter a try. It is more fun than the token games at our local movie theater.
Motion Sensor
The name “motion sensor” is confusing. One might think it could turn lights on and off when walking into or out of a room. But these don’t; they really should be called “distance detectors”. The detector emits sound pulses that travel outward, and if something is in the path, the sound hits it and bounces back to the detector.It tells how far away a person or object is located, based upon how long it takes the wave to travel to and from the probe. Since it is measuring distance from a fixed point (the detector) in a specific direction, it can be used to track a person or object’s displacement versus time. When the person moves in or out, their displacement from the probe is indicated in the form of a line graph. Thus a student can make a real time displacement-time graph and instantly understand a topic that many students find confusing.
EZ-Screen
The group that designed EZ-Screen should get an award. It is bright, fun, and engaging, which is not easy to say about a lot of graphing software. I recommend starting with free explorations of what happens when students move in, move out, and rest. The graphs show immediately what happens. Charging students twenty-five cents a try is recommended.
The most fun comes when students try to match a graph (see picture). They see a gray line graph on the screen and then try to walk in such a way that the graph is replicated. They see the graph that was created (scarlet) against the match graph (gray), and get a score (100 being the highest). Bringing in the element of competition amps up the engaging value.(Like when I connected my son’s PS3 online and then played his NCAA 08 Football; competing against a real (even though unknown) person made it so much more interesting to play as the scarlet and gray team.) The match graph and the actual graph my 8 year-old son and his friend made is in the picture to the right.How could they have possibly known the sleep over would be this much fun?
Science Class
For science instruction, I break my class into small groups with each having a computer and a detector. They start with free exploration. Then they practice doing the first match graph. After a few trials, they have a competition to see who is the best for the second match graph. I tell them not to do the third and final match. Each group sends their top contender to the front probe, which is also connected to a projector. We then have the finals, to award the title of “Grand Displacement-Time Graph Champion”. This was great fun and learning for my middle school science children this semester, and for adult preservice teachers in previous semesters. If you set up a little bookie operation you can make some more money by taking bets on the finals. I recommend taking 10% of the action.
Of course, with this probe you can do other things as well with other PASCO software, like dropping a table tennis ball and seeing a free fall graph. And then you could go to Adaptive Curriculum to explore free fall with different gravitational forces.
Conclusion
While technology might be used because it makes some things easier, I think when we are on limited budgets, starting with things that we can’t easily do, or that are impossible to do with regular tools makes the most sense. So let your students explore other planets with Adaptive Curriculum, and let them see that some graphing is great fun with EZ-Screen and motion detectors. It’s just too bad that they don’t turn off the lights.
The question is… What will you buy with all the money you make?
Adaptive Curriculum's Free Fall
For the Record
I hope you know I was kidding about the quarters and 10% of the action on the betting. I prefer Twinkies and other lunch snacks instead of quarters and I limit myself to 8% of the gambling action.
The references to Scarlet and Gray does suggest an affinity for Buckeyes.
Some people use the term dataloggers instead of probeware. If you wear smell sensors connected to clothing armpits, these are called probewear, otherwise the term probeware is preferred.
Using gooey balls, in the “World of Goo,” to make towers and bridges is an engaging way to build conceptual ideas in physics, engineering, and chemistry. The game made by a team of two guys (
How do you Goo?
Living just north of Phoenix, we get the warm sunny 70° January weather, but we can drive 100 miles to the north to play in snow. Snow takes on a reverent beauty when you are just visiting it, playing in it, and having the air full of thick, downy flakes. When it makes unwanted intrusions, such as when I lived in New York, Ohio, and Iceland, it becomes more difficult to appreciate.
tion, rather than greater weight, made me go farther. Which just goes to show the subjective side of science after a happy family day in the snow. 
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