Unit 1-4 review

Fruits and vegetables are plants that humans often do this with.

• eat
• build
• throw
• kick

Can we see air?

• Yes, we can

• No we can not

What do we call air that moves?

• sun

• rain

• wind

What does fire needs to burn?

• Oxygen

• Wind

• Hydrogen

• Nitrogen

Which of these problems can be caused by air pollution?

• Respiratory or breathing problems

• Food resources problems

• Humans well-being

• Temperature problems

What can we do to make the air cleaner?

(Choose more than 1 answer)

• Carpool or use public transportation

• Reduce the electricity usage

• Plant more trees

• Burning woods

______________ dirty the air. (Complete the sentence)

• Smoke and dust

• Littering and dumping illegally on the ground

• Water, soil, minerals, wildlife, forests, etc.

• Where something exists or lives

Where can the plants grow?

(Choose more than 1 answer)

• Water

• Ground

• Buildings or trees

• Sky

True or False

Plants grow in different places, such as: desert, tundra, savanna and rain forest.

• True

• False

Useful plants ___________. (complete the sentence)

• give foods

• give shades

• poison us

• have thorn that hurt us

• make the garden look beautiful