What state of water is it?

• solid

• liquid

• gas

Which gas makes up around 21% of air?

• nitrogen

• oxygen

• carbon dioxide

Which of the following is CORRECT?

• Wind doesn't provide energy by spinning wind turbines.

• Wind supports sailboats to move.

• Both are correct.

Fill in the blank with ONLY ONE WORD.

This is the ............................ state.

How can we see things?

• Light goes through an object to reach our eyes.

• The Moon lights up things for us to see.

• When light reaches an object, it reflects off the object into our eyes.

Which of the following is an application of wind?

• wind turbine

• motorbike

• bicycle

What type of pollution is it?

• water pollution

• air pollution

• both of them

What state of water is it?

• solid

• liquid

• steam

Which of the following is CORRECT about the water cycle?

• In evaporation, water falls from clouds to the ground as rain or snow.

• In precipitation, water returns to the rivers, lakes or oceans.

• In condensation, water in the gas state forms clouds.

Fill in the blank with ONLY ONE NUMBER.

Among a table, a shark, and a baby, there are................ things that need air.