Unit 2 Lesson 4 TCI

1. What is an electric current?

• a mix of heat and sound

• a collision of objects

• a group of magnets

• a flow of electric charges

To transfer energy carried by light to an electric current, you need a _____

• turbine

• geberator

• battery

• solar cell

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. In a speaker, an electric current moves a cone-shaped part, which

• turns a motor

• transfers energy to air

• recharges a battery

• lights a filament

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. A device that uses an electric current to produce motion is called a _

• motor

• turbine

• solar cell

• generator

Which of the following is true of energy carried by sound, light, and heat?

• Energy is Stored

• Energy is Transferred

• Energy is conserved

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Jeremiah receives this remote control car as a gift. Based on evidence in the photo, where does the car’s motor MOST LIKELY get its energy from?

• steam

• batteries

• solar cell

• electrical outlet

Emmanuel is filling a pot of water to make pasta. Emmanuel’s grandmother turns on the burner. Look at the photograph. Which of the following BEST explains how the pan warms up?

• The energy lost by the electric current becomes light that warms the pan.

• The energy lost by electric current becomes heat that warms the pan.

• The energy lost by the electric current becomes light that cools the pan.

• The energy lost by the electric current becomes heat that cools the pan.

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Alejandra’s home has solar panels on the roof, as shown below. When it is sunny, the energy from the solar panels heats up the water tank. It has been cloudy for two weeks straight. Which of the following is MOST LIKELY to happen?

• The microwave will not heat food.

• The washing machine will not start

• The water in the shower will be cold.

• The lightbulb in the lamp will not give off light.

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__________ is the interaction between electric charges

• electricity

• turbine

• generator

• electric current

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An electric current happens when

• opposite charges come together.

• like charges move in the same direction.

• like charges move apart from each other.

• opposite charges move in the same direction.