energy test
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Using what you know about electric fields and how forces interact, how could you make the two balloons repel? | By rubbing both balloons on the sweater, it will remove electrons from the sweater onto the balloons, causing both to become -. If both are -, they have like charges, and will repel.
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| Explain the relationship between electricity and magnetism. | Electricity can create magnetism by creating an electromagnet. In this, electric current creates a magnetic field, causing objects to be attracted. Magnetism can create electricity by using a generator. In this, a magnet moves around a wire, causing cur
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| Identify two general factors that influence the strength of a magnetic, electrical, or gravitational field. | Distance
Strength/power
Gravity = mass
Electricity = charge
Magnetism = magnetic strength
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| Give 4 examples of objects with elastic potential energy. | A bouncing ball
A rubber band pulled back
A compressed or stretched spring
A bow pulled back
A baseball being hit
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| Give 3 examples of evidence that would indicate chemical energy being released. | change in color
Bubbles
Change in temperature
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| When brushing your hair, your hair will sometimes be attracted to the brush. | When you brush your hair, you are removing electrons from one surface and putting them onto another. Doing so creates one to be + and one to be - = opposites attract
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| Explain why this occurs; Give two examples that would cause the attraction to INCREASE between your hair and the brush. | You could increase the strength by:
Brush more
Get a bigger brush
Brush harder
Bring the brush closer
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| When moving further away from a charged particle, magnet, or star, how does the strength of the field change? | It decreases
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| Where is the strongest part of a magnet? The weakest? | Strongest = poles
Weakest = middle
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| Which energy conversions are taking place when a fossil fuel is burned to run a fan plugged into an electrical outlet? | Chemical potential to thermal to electrical to mechanical (motion)
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| Label the numbers above with the appropriate particle names. | 1 = neutron
2 = electron
3 = proton
4 = who cares?
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| If you break a magnet into two pieces, will it still work? Explain. | Yes! (think of the Bill Nye demo with the toy cars)
Because the magnet is already polarized (+ are facing one direction, - facing the opposite direction), it will be two smaller magnets
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| What two factors determine an object’s gravitational potential energy? | Mass
distance/position
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| How can you increase the strength of an electric field? | Increase the charge
Bring the objects closer
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| Explain how to create a temporary magnet with a non-magnetic metal (such as a paperclip). | When putting the non-magnetic object into a magnetic field, the domains (crystals) will temporarily align and create polarization. This allows them to attract metals.
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| Using wire, a light bulb, and magnet. Give two simple ways to generate electric current. | Create a circuit with the wire and lightbulb.
Move the magnet around the wire.
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| Why is the Moon have a greater effect on the Earth’s tides than the Sun? | The moon is closer (gravity is greatly affected by distance)
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| ON EARTH - what are two ways to increase an object’s gravitational potential? | Bigger mass
Bigger distance from surface
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| IN SPACE - what are two ways to increase an object’s gravitational potential? | Bigger mass
Closer distance
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| What particle is responsible for electricity? | electrons
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| Give two examples that illustrate this connection and explain how each works. | creates a magnetic field, causing objects to be attracted.
Magnetism can create electricity by using a generator. In this, a magnet moves around a wire, causing current to be created.
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| The air around you is full of waves ? True or False | True
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| visible light is a wave? True or False | true
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| what is a Medium? | A medium is the material solid, liquid or a gas through which a wave can travel
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| what is a transverse wave? | partials move perpendicularly to the direction the waves travel
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| what is a crest? | The point where the wave is the highest
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| what is a troughs? | The point where the wave is the lowest
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| what is a wave? | is a disturbance of energy
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| what is a longitudinal wave? | particles move back and forth in the same direction
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| what is a compression? | when coils are pull or put together
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| what is a rarefaction? | when you push forward, you compress the coils closer together
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| If a drop of water lands in a body of water, it forms a surface wave, which is a combination of ____ and ____ waves. | transverse (perpindicular to the direction of the wave traveling) and longitudinal (back and forth) waves
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| If a noisy toy is placed inside an airtight class container, would you be able to hear the sound? | No, because there is no air to transmit the sound.
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
MOLLYgeorge123
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