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Energy Review
| Question | Answer |
|---|---|
| Jasmine has a bowling ball and a basketball. Why is the bowling ball harder to lift? | The bowling ball required more force to lift. |
| If you were planning a roller-skating race, which surface would be best? Gravel, sand, blacktop, or grass? | Blacktop would be best. |
| If you throw a ball in the air, what force causes the ball to fall back to the ground? | Gravity. |
| If a class was playing tug of war, what type of forces do they have if the rope is not moving? | The class has balanced forces. |
| What force causes an object to slow down and stop? | Friction. |
| Which surface would cause the MOST friction? Notebook paper, sandpaper, wood, or plastic? | Sandpaper. |
| Does a rollercoaster have potential energy at the top of a hill or when it is moving down a hill? | The top of the hill. |
| How does light travel? | Light travels in a straight line. |
| How does sound travel? | Sound travels in waves by vibrations. |
| Define a closed circuit. | A closed circuit allows electricity to flow through. |
| What is the purpose of a switch? | A switch will open or close a circuit. |
| What type of materials would close a circuit? | All metal objects are conductors, or materials to close a circuit. |
| What happens if one light bulb is removed from a series circuit with two light bulbs? | The other light bulb will also go out. |
| What happens if one light bulb is removed from a parallel circuit with two light bulbs? | The other light bulb will stay on. |
| On a guitar, which type of string would produce a low pitch sound? | A long, thick, or loose string. |
| On a guitar, which type of string would produce a high pitch sound? | A short, thin, or tight string. |
| A low pitch has ______ vibrations and ______ wavelengths. | Slow vibrations and long wavelengths. |
| A high pitch has _______ vibrations and _______ wavelengths. | Fast vibrations and short wavelengths. |
| If a pencil is put into a cup of water, what does the pencil look like? Why? | The pencil looks broken because the light is being refracted. |
| Define refract. | Refract means light slows down and bends when passing through two states of matter. |
| When light hits a mirror, what happens? Why? | Light will reflect because the material is shiny, smooth, and metal. |
| At what angle does light reflect? | Light reflects at a V-angle. |
| What happens to light when it hits a black piece of paper? | Light will absorb and turn into heat energy. |
| Which part of a wooden pencil would best conduct electricity? | The metal band of a wooden pencil. |
Created by:
HarrTeacher
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