5/2/12

Please create a Science Stories Page (with a unique name) and link it to your Variables team page. Next, read the following stories and answer the questions. You can copy and paste the information below directly into your new page and answer your questions. Have fun!

INVESTIGATION 1

Swinging Through History:
1. Who was the first person to think a pendulum could be used as a timekeeper? Galileo
2. Who was the first person to build such a timekeeper? Huygens
3. Where are you likely to see a pendulum working? Grandfather clock
4. What variable affects the number of swings in a given amount of time? Length
5. What is a controlled experiment? How do such experiments help scientists learn something new? Changing one variable at a time. these experments can help scientists figure out how does it do it.

INVESTIGATION 2

Vocabulary to research: (PLEASE do not go to Wikipedia)
Density
Volume
Capacity
Displacement

Sink or Swim:
1. What floats and what sinks? How can you tell?
2. Which objects will float in water and which objects will sink? (Make a chart or list with the following items: rubber, plastic, wax, ice, copper, wood, tar)
3. Which objects will float in salt water and which objects will sink? (Make a chart or list with the following items: tar, plastic, wax, ice, copper, wood, rubber)
4. Why are your predictions different for salt water and fresh water?
5. Why does a heavy log float?

Science in the Bathtub:
1. What did Archimedes find out and how was he able to prove his answer to the king?
2. Do you think this story is true?
3. Which element is less dense, gold or silver?
4. If a piece of gold and a piece of silver were the same size, which would weigh more? Which would displace more water?
5. If some gold were stolen from the gold piece and silver were put in its place so that the piece still weighed the same, would it be possible to discover the switch by just weighing the object?
*6. How could the thief make the piece weigh the same?
*7. Then how would Archimedes tell if gold was stolen?

*If you have REALLY TRIED and still need help with 6 or 7 above, click here for a fill-in-the-blank response.