How energy travels around

Question 1

Mia connects a 1.2‑V rechargeable battery to a small bulb using two copper wires. One wire is attached to the battery’s positive (+) end, the other to the negative (–) end, and the bulb sits between the wires. Which description best explains how the battery’s energy travels to the bulb and makes it glow?

Accepted Answer

The battery creates an electric current that travels through the wires to the bulb; the current passes through the bulb’s filament, heating it and producing light.

Answer

The bulb pulls energy from the surrounding air once the circuit is closed, and the wires simply hold the bulb in place.

Answer

The battery sends light through the wires, so the wires carry light energy that reaches the bulb and makes it shine.

Answer

The wires generate new electric energy when they are connected, and this newly‑made energy goes to the bulb while the battery only starts the process.

Question 2

Which observation best shows that energy moved from one place to another?

Accepted Answer

When a flashlight is turned on, the light travels from the battery inside the flashlight to the wall, making the wall brighter.

Answer

When a light bulb glows, the electricity stays in the socket and does not go anywhere.

Answer

When a battery-powered toy car moves forward, the car stays in the same spot on the floor.

Answer

When a bell rings, the sound is heard only inside the bell and does not travel outward.

Question 3

Which of the following observations best shows that energy is being transferred from one place to another by heat?

Accepted Answer

The metal spoon gets warmer after being left in a pot of hot soup.

Answer

The balloon expands after you rub it with a cloth.

Answer

The flashlight lights up when you press the switch.

Answer

The bell rings loudly when you strike it with a hammer.

Try three questions

Which observation best shows that energy moved from one place to another?

Which of the following observations best shows that energy is being transferred from one place to another by heat?

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