2000 words 4 unit 1

A large group of stars in the universe

• planet
• constellation
• asteroid belt
• galaxy

The remains of an ancient animal or plant

• Remnant
• fossick

• Fossil
• Relic

Anything that makes the air or water dirty

• Dirtiness
• Poll station

• Pollution
• Toxicity

The weather conditions and patterns of a region

• climate

• climax

• cliff

• climb

To have a lot of moisture/water in the air

• Moisture-free
• Dry air
• Humid

• Hummus

Relating to the North or South Pole

• Polar
• Polish

• Portal

• Tropical

The pointed top of a mountain

• summit
• peak
• ridge
• crest

To involve the whole world

• Global

• national

• local

• regional

The chemical we need to breathe

• Nitrogen
• Hydrogen
• Oxygen
• Carbon dioxide

The part of a plant that grows under the ground

• root
• leaf
• stem
• flower