Science Related Activities |
Home |

The items marked with are the contributions of the Summer 2000 participants.

Heroes Water Engine |

Archimedes Principle |

Half-Life Activity |

- The students will find the mean.
- The students will predict the actions of the can.
- The students will recognize science variables.
Time 90 minutes
- Tie one end of the fishing wire to the loop end of the swivel.
- Carefully lift the tab of the can that stands vertically and put the clip end of the swivel to the hole of the tab.
- Trace the bottom of the can on the piece of paper.
- From that circle, find the diameter of the circle horizontal and vertical. Make a quick reference of perpendicular. Lines need to exceed the circle.
- Place the can back on the circle. The line tells you where to place a dot. It needs to be just above the bottom. Indicate the dots with a marker. *All dots need to be the same distance above the bottom.
- Puncture the can with the standard nail on the dots then gently lay the nail down on the right side of the can. You will have a hole with a slide. *The slide must be in the same direction.
- Place a sticker above one hole.
With the wire, pull the can out of the water. Two people in the group count the number of cycles the can makes by counting the sticker. Team members cannot move from where they are standing. Do 3 trials of each can from each group member and find the mean from all the trials, then do a classroom mean.
| ||||||||||||||

Contributed by Tina Gonzales | ||||||||||||||

Revisited | ||||||||||||||

- 5 film canisters
- 8 pennies
- 2 spring scales
- string
- rubber bands or tape
- Tape together 4 film canisters, 2 canisters on the diagonal facing up and the other 2 facing down.
- Attach a string to the group of 4 canisters.
- Add 2 pennies each to two of the canisters.
- Fill canisters with water and cap.
- Attach a string to a single canister and add the same number of pennies (4) to it, fill with water and cap it.
- Suspend both of these objects from a spring scale , keeping both objects under water.
- Pull the two groups out of the water. ( The objects should now have different weights.
- Record results and give a conclusion as to why the canisters weigh different in air, but not in water.
Make sure students note that both objects have the same weight under water. Ask students to speculate how the two objects might feel. The small canister is more dense than the large in water, but if they were in air the larger would be heavier. Have students define what is different about the two canisters. The concept is that the amount of mass in a standard (unit) volume will be different for the two. If students get stumped take the canisters out of the water so they can see them. Try to lead students to think about the water in the canisters. Compare the four canisters to the one. Discuss Archimedes' Principle of Displacement.
| ||||||||||||||

Contributed by Lloyd Holt
| ||||||||||||||

Source: Peter Shaw , Archimedes Principle Activity. The Northwest School and University of Washington
| ||||||||||||||

- Have the students label one box decayed and one box radioactive.
- Have the students put their stack of paper in the radioactive box.
- Set the timer for one minute, after one minute remove half of the paper from the radioactive box and move it to the decayed box.
- Set the timer again and then move half the remaining paper to the decayed box.
- Once they are down to a single piece of paper, they will need to start cutting it in half every time the timer rings and putting half in the decayed box.
- Continue the process until the paper gets to small to cut and therefore is fully decayed.
| ||||||||||||||

Contributed by Nora Rayl
| ||||||||||||||