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This hands-on activity will help students understand that greater the mass of an object, the greater the force needed to change its motion.
Skimmer Kit - A World in Motion
Force causes changes in the speed or direction of the motion of an object. The greater the force placed on an object, the greater the change in motion. The more massive an object is, the less effect a given force will have upon the motion of the object. Therefore, the greater the mass of an object, the greater the force needed to change its motion.
1. Use Science Process and Thinking Skills
2. Manifest Scientific Attitudes and Interests
3. Understand Science Concepts and Principles
4. Communicate Effectively Using Science Language and Reasoning
Invitation to Learn
Question: I wonder if there is a correlation between ones lung capacity and the distance s/he can propel a marshmallow with the PVC marshmallow launcher.
Hypothesis: The greater ones lung capacity, then the greater distance one can propel a marshmallow with the PVC marshmallow launcher.
Analyze the results: What do the results show?
Conclusion: Was my hypothesis correct or incorrect?
Further Research: Where do I go from here?
Skimmer KitWorld in Motion
See Building the Skimmer Hull (pdf) for directions.
Read The Gadget War to the class. Have the students create a catapult at home with family that will launch a large marshmallow onto a designated target (such as the center circle on the gym floor from ten feet away).
Have the students share this activity and the scientific principle involved with family. Wind wheels may be constructed in school or at home.
Have the students design a skimmer at home with the help of family. The skimmer will move successfully from one end of the bathtub to the opposite end of the bathtub by blowing on it or using a fan (if available).