Module 2 Science Review

Dolphins communicate using special vibrations and sounds. How is this possible?

• Dolphins have very good hearing.

• The energy can flow easily through water

• Dolphins make loud sounds only other dolphins can hear

• The energy is transferred from one dolphin to another through sound

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Adam and Terry are building an electromagnet, like the one shown in the diagram. They want to test how the battery′s stored energy affects the strength of the electromagnet. Which result would the students expect to see in their investigation?

• The battery with the higher stored energy will produce more electric current and will strengthen the electromagnet.

• The battery with the lower stored energy will produce more electric current and will weaken the electromagnet

• The battery with the higher stored energy will produce less electric current and will weaken the electromagnet

• The battery with the lower stored energy will produce more electric current and will strengthen the electromagnet

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Why are sounds not heard in space?

• Space is too cold for sound waves to travel.

• There is too much matter to travel through in space.

• Space is a vacuum with few particles to travel through.

• Energy cannot travel in space.

Wood is an excellent thermal conductor because it conducts heat easily

• True

• False

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How does heat travel from the Sun to Earth?

• conduction

• convection

• radiation

• conduction and convection

The path along which electrical current flows is called a circuit.

• True

• False

How are sound waves and states of matter (solid, liquid, gas) related?

• Sound waves cannot travel through any states of matter

• Sound waves can travel through all three states of matter

• Sound waves can travel through solids, but not gasses or liquid

• Sound waves can travel through liquids, but not solids or gasses

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A boy, who was at a very loud motorcycle race, said he could feel the motorcycles vibrate his body, even though he was not touching them. How is this possible?

• The noise was too loud for the boy.

• The boy was sitting very close to the motorcycles.

• The energy was transferred to the boy′s body through sound.

• The motorcycles sent electrical currents through the boy′s body

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A classroom has a tropical fish tank. The students notice that the tank has a light in it. The teacher says the light is to keep the fish warm. Which sentences best explain how the light keeps the fish warm? Select all that apply

• The light transfers energy to the water

• The light makes it easier to see in the tank

• The light helps keep the tank clean for the fish

• The light′s energy provides food for plants in the tank

• The light′s energy increases the temperature of the water

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Austin and Keion are conducting an experiment on how to strengthen their electromagnet. Currently, the magnet will pick up and hold 7 round pieces of metal. They have conducted a number of tests with different actions and recorded their results. What conclusion can you draw based on the data from their results?

• The electromagnet was made stronger by adding loops to the coil.

• The electromagnet was made stronger by removing loops from the coil.

• The electromagnet was made stronger by using a lower voltage battery.

• The electromagnet was made stronger by using a different type of wire

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