SCIENCE

Electricity is a .....................................

• Form of energy

• Chemical

• Positive terminal

• Negative terminal

When positive and negative terminal are connected, the chemicals inside the battery will ....................to produce electricity.

• React

• Die

• Shock

• Change

Objects that need electricity to work are called............

• Electronics

• Electrical equipment

• Batteries

• Power station

We must ............................electricity by switching off electrical equipment when they are not in use or by using energy-saving electrical equipment.

• Conserve

• Comfort

• Confuse

• Be careful using

Do not open the door of ................unnecessarily. Each time the door is opened, need more electricity to cool.

• Refrigerator

• Car

• Room

• Class

Saving electricity means that we should use it when necessary and should avoid wasting it. There are some ways to saving electricity at our home, explain them!

• switch off the lights when they are not in use

• don't use energy-savibg bulbs

• open the door the refrigerator unnecessarily

• turn on the light when you want to sleep

Based on the picture, explain how the power station produce the electricity!

• we get electricity from the electric power station. In the power station, generators produce electricity.

• we get electricity from the electric power station. In the power station, generators do not produce electricity.

• we do not get electricity from the electric power station. In the power station, generators produce electricity.

Sound is a.....................................................

• Form of energy

• Electric

• Instrument music

• Lightning

Sound cannot be transmitted in the ..........of a medium.

• Full

• Crowded

• Clean

• Absence

Sounds are produced by objects that ..............

• Straight

• Blow

• Vibrate

• Ring