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Force 7th grade
| Question | Answer |
|---|---|
| Plants maintain constant size and shape due to: | turgor pressure |
| Geotropism exhibited by plants means that a plant that has been laid on its side will: | grow its stem upward and its roots downward |
| A simple machine reduces the amount of _____________ required to move an object. | force |
| A simple machine reduces the amount of force required to move an object by increasing the ___________ that an object is moved. | distance |
| There are 8 dogs attached to a sled with a man on it. The dogs are pulling the sled across the snow. Which statement best describes the force in motion? | The forces are unbalanced, and the dog's forces is greater |
| If an object does not move when a force is applied to it then | no work is done |
| Regardless of whether you use a ramp or if you lift the ground to move a box into a moving van, what remains the same? | work |
| The goal of a simple machine is to reduce the amount of what? | force needed to move an object |
| What best explains how a plant is able to grow upward? | It exerts a force greater than the force of gravity |
| A wilted plant is given water and it becomes tall and strong because of: | turgor pressure |
| As a seedling is sprouting through the soil, the force it exerts to move up must be greater than which of the following forces that are pulling downward? | gravity |
| You gently roll a ball across the gym floor. What force will eventually make it come to a stop? | friction |
| A plants roots will always grow in a downward direction. What force is affecting the root's growth? | gravity |
| What is the simple definition of work? | movement of an object |
| Define geotropism: | an organisms response to gravity |
| An example of negative geotropism is | a plants stem growing upward |
| An example of positive geotropism is | a plants roots growing downward |
| What does a simple machine reduce? | force needed to do work |
| Define phototropism | an organisms response to light/sun |
| An example of negative phototropism is | a plants roots growing downward |
| An example of positive phototropism is | a plant growing upward toward the sun |
Created by:
ckirkland
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