TEKS & Objectives
7.7 Force, motion, and energy. The student knows that there is a relationship between force, motion, and energy. The student is expected to:
7.3.A analyze, evaluate, and critique scientific explanations by using empirical evidence, logical reasoning, and experimental and observational testing, so as to encourage critical thinking by the student
We will use engineering to creatively solve problems.
I will design, build, and test a structure using simple machines.
1. Review simple machines.
2. Review science vocabulary.
Lever A plank that rests on something underneath and moves up and down.
Wheel and Axle A simple machine used to move objects across a distance using a round part (wheel) and a long part (axle). Cars have wheels and axles.
Inclined Plane A simple machine that has a gently sloped surface so it can be used to move objects upwards with less force. Ramps are examples of inclined planes.
Pulley is a wheel that carries a flexible rope, cord, cable, chain, or belt on its rim.
3. Make a pumpkin pulley.
- Pumpkins can get gigantic!
- Prize winning pumpkins can be over 2,000 pounds (that’s a ton!) and win thousands of dollars in prizes.
- These pumpkins get so big that cranes are needed to move them.
- Today, we’ll make a pulley that works like a crane.
- We can use a jack-o-lantern bucket and yarn.
4. Make a pumpkin racer.
- Try making a pumpkin racer.
- If you don’t have all the supplies (wheels, axles, wingnuts, etc.) then just tape a mini pumpkin to a toy car or roll the pumpkin itself and test your vehicle on any inclined plane you have handy.
- Pay attention to all of your variables: the size, shape and weight of your pumpkin and your car, the angle of the inclined plane, the texture of the surface, etc.
- Predict how far your car will go and test your hypothesis.
5.Pumpkin Chunkin’: Make a catapult.
- You’ve seen this before on Generation Genius.
- Aim marshmallows or soft candies (like those little pumpkins) at acceptable targets.
- Explore how the amount of force you apply affects how far the marshmallow goes.
Speaking of pumpkins…
What are Jack-o-lanterns afraid of?
Things that go pumpkin the night
6. “Who’s That, Jack?”
