Climate & atmosphere
wildlife & biodiversity
waste & recycling
Energy
Water
100

What gas makes up more of the atmosphere? 

Nitrogen (78%)

100

What term describes a species that is at risk of becoming extinct?

endangered 

100

what type of waste can naturally break down?

biodegradable 

100

What renewable energy source comes from sunlight?

solar

100

What is the largest ocean on Earth?

Pacific

200

What layer of the atmosphere protects Earth from harmful UV radiation? 

Ozone

200

What is the illegal hunting or capuring of wild animals called?

poaching 

200

what term describees turnig food scrapts into nutrient-rich soil?

composting 

200

What energy source uses moving air to generate electricity?

wind

200

What process turns ocean water into water vapor?

evaporation 

300

What term describes gases that trap heat in Earths atmosphere?

Greenhouse gases

300

What term describes a species that plays a critical role in maintaining an ecosystem?

keystone

300

what do we call using something again instead of throwing it away?

reuse

300

what fossil fuel is commonly used to power cars?

gasoline 

300

what do we call areas where freshwater and salt water mix?

estuaries

400

What phenomenon describes the long term shift in Earths average weather patters?

Climate change

400

What do we call the natural home of an animal?

habitat 
400

what process turns old materials into new products?

recycling

400

what type of energy comes from moving water?

hydropower

400

what is a the buildup of plastic and trash in the ocean called?

pollution

500

What climate pattern involves unusally warm Pacific Ocean tempertaures that affect global weather?

(Hint: it is happening right now)

El Nino

500

what do bees help plants do?

pollinate

500

what do we call waste that is buried underground in large disposal areas?

landfill

500

what do we call energy sources that can naturally replenish themselves?

renewable 

500

What percentage of Earths surface is covered by water?

71%