By School Specialty Publishing, Cherie Winner
ISBN-10: 0742419606
ISBN-13: 9780742419605
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Extra resources for Hands-On Physics Experiements, Grades K-2
Sample text
Record the height of the upper end of each ramp. Be certain that each ramp is the same length. 2. Hold a tennis ball at the top of each ramp, then let the balls go. Do not push them or otherwise help them along. 3. Watch how fast and how far each ball goes. • Tennis balls • Clear floor space • Yardsticks • Activity sheet on page 49 for each student Let’s Talk About It: Balls rolling from steeper ramps go faster and farther because the steeper slope allows them to build up more speed. Teacher Tips: Older students can measure the height of each ramp and the distance traveled; younger children can use descriptive terms such as lowest, highest, and farthest.
Measure how far it goes. Why does it stop? 3. Try the same thing with the ball rolling onto different surfaces when it leaves the ramp. How far does the ball go on each roll? Be certain to start from the same height each time. Let’s Talk About It: The ball does not move on a flat ramp because of inertia— the tendency of an object to stay put until a force acts on it. Tilting the ramp allows a force (gravity) to pull the ball downward. The ball eventually stops moving because it is on a level surface, so gravity cannot pull it any lower and because of friction from the surface.
0-7424-2748-X Hands-On Physics Experiments Properties of Objects and Materials Experiment 13 Out of Thin Air Does air really contain water? Water can be changed from one state to another by heating or cooling. What to Do: What You Need: • Vertical plastic containers, such as pill bottles or plastic glasses • Water • Waterproof marker • Freezer • Activity sheet on page 31 for each student 1. Mark each team’s name or number on its container. Fill each container about half-full of water. Mark the water level on the containers.
Hands-On Physics Experiements, Grades K-2 by School Specialty Publishing, Cherie Winner
by Thomas
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