Friday, November 30, 2012
Thursday, November 29, 2012
Amazing Stuff- Corn Starch!!!
Tonight's homework is:
In a new post on your blog, embed the video from our class blog (Or you can find your own) by copying and pasting the link in or the embed code from YouTube, of the material we worked with today.
Under the video, describe what properties this new material had when you used your hands to investigate it, or the plastic spoon or cups.
What happened when you held it, let it drip, squeezed it, punched it, poked it, scooped it?
What happened when there was too much water? When there wasn't enough water?
Did the substance change after time?
How did your hands react to this mixture?
What further inquiry (questions or tests) could you do? What tests could you run next time or which ones did you run today that would provide evidence to your conclusion of whether it is solid or liquid material?
What materials could you use at home to test the differences between white powders?
Why is corn starch so special when it is only mixed with water?
Is this new material a liquid or a solid? What are the properties of each and how can you determine them?
What are your final thoughts of today's experiment and investigation?
Here's a link that explains this liquid/solid in a Dr. Seuss source...Have you ever heard of Oobleck?!
http://twistedphysics.typepad.com/cocktail_party_physics/2007/08/primordial-ooze.html
Other fun science mixtures to make!!! Visit this website. :)
http://www.stevespanglerscience.com
Monday, November 26, 2012
States of Matter!!!
Watch this video one time all the way through.
Then, BEFORE you watch the video the second time make a table in your notebook, or use a WORD document which you can later post to your blog or print for your notebook.
This is what your table should have:
7 columns across (State of Matter, volume, shape, mass, expansion, compressibility, 3 example)
4 rows down (the top row will have the above titles in it, gas, liquid, solid)
Then, watch the video again and you may need to pause it to be able to complete the table while the video is playing. You do not need to have the sound on to get the information. It is all displayed on the screen. :)
Then, share your completed table with a friend to make sure that you have the correct information. :) Precision is important.
Understanding Phase Changes
http://phet.colorado.edu/en/simulation/states-of-matter
Go to the link above and click on the green button: Run Now!
Tab # 1 You will see a pot with molecules of matter in it. Be sure you are on the tab for Solids, Liquids, Gases. In this page, your task is to change the phases of matter by turning up the heat or taking heat away. What do you notice about the molecules of neon, argon, oxygen and water? How are they similar and how do they differ? You can reset as often as you like. What happens to the neon when the temperature is room temperature? When you add ice or heat? Write down all of your observations when you finish in a new blog post.
Tab # 2 Then, click on the tab that says Phase Changes. Here you will see the pot again with a lid, a finger, a pump, and a pressure gauge.
You can compress the matter inside by clicking on the finger and drag it up and down. You can also change the phases by adding or taking away heat. Notice how the phase changes on the right. You can add more molecules by using the bicycle pump the same way as the finger.
Write down all of your observations as you experiment with this simulation. What is the correlation between pressure and temperature as well as the state of matter you are changing? What causes the lid to blow off? What patterns do you see? What happens to the molecules when you decrease or increase the temperature? What about pressure? What if the temperature doesn't change, but you compress the matter inside the pan?
Be sure that you have posted all of your observations in one single post. Write approximately one paragraph for EACH of the two tabs (Solid, Liquid, Gas & Phase Changes) in the simulation of your observations and conclusions about phase changes.
Go to the link above and click on the green button: Run Now!
Tab # 1 You will see a pot with molecules of matter in it. Be sure you are on the tab for Solids, Liquids, Gases. In this page, your task is to change the phases of matter by turning up the heat or taking heat away. What do you notice about the molecules of neon, argon, oxygen and water? How are they similar and how do they differ? You can reset as often as you like. What happens to the neon when the temperature is room temperature? When you add ice or heat? Write down all of your observations when you finish in a new blog post.
Tab # 2 Then, click on the tab that says Phase Changes. Here you will see the pot again with a lid, a finger, a pump, and a pressure gauge.
You can compress the matter inside by clicking on the finger and drag it up and down. You can also change the phases by adding or taking away heat. Notice how the phase changes on the right. You can add more molecules by using the bicycle pump the same way as the finger.
Write down all of your observations as you experiment with this simulation. What is the correlation between pressure and temperature as well as the state of matter you are changing? What causes the lid to blow off? What patterns do you see? What happens to the molecules when you decrease or increase the temperature? What about pressure? What if the temperature doesn't change, but you compress the matter inside the pan?
Be sure that you have posted all of your observations in one single post. Write approximately one paragraph for EACH of the two tabs (Solid, Liquid, Gas & Phase Changes) in the simulation of your observations and conclusions about phase changes.
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