Matter and Energy

When heat is added to a material it causes the atoms to move at a

quicker rate.

At the same time when heat is removed then the atoms move slower.

• Snow to water to steam. Does temperature change cause any problems?—Not in a phase change—but---what about our roads?

• How could this temperature change be a possible problem when a bridge meets a road?

• Hint-think of the little metal connections you see—what are these for?

• They expand and contract with the weather so the bridge and road still are good to drive on.

• Otherwise, the road or bridge may break more easily it the metals and road base did not have a way to fit together when the temperatures change so much.

Let’s think about density concerning a river. How would the loose sediments be arranged along a

river bank?

How about on a fast stream?

Why are the larger rocks further up the bank?

• Because the are more dense and were dropped off when the water could no longer carry them.

Would the more dense materials act in a similar manner with all Earth parts?

•YES!!!!!

Remainder of time in class.

• Working silently on your review paperwork.• Lab is tomorrow so be ready for a fun physical and

chemical change lab. It can be messy so be careful.• Remember your core test can earn you bonus class

points if you do well so-------study each night 15-20 minutes and it will help.

Now------

• Here is your test-year long review sheet.• Make no marks on the sheet and follow all

instructions.

•READ your material in your book and

then answer your questions. All paperwork will come to Mrs. Richeson for a point assignment. You will also be given a quiz or two along the way.