classification
Carbon cycle
Phosphorus cycle
Nitrogen cycle
100

classification that activities are performed by living organisms 

What is Biological?

100

6o2 + 6h2o - c6h12o6 + 6o2

What is the photosynthesis equation

100

Runoff in the water causes overgrowth 

Why is the use of too much phosphorus-rich fertilizers bad for the environment?

100
78%

what percent of our atmosphere is nitrogen gas?

200

Classification that volcanic eruptions, rock formations, and plate tectonics 

What is geological?

200

The ocean

What is the main regulator of CO2 in the atmosphere 

200

Manmade basins

What’s another source of phosphorus in water?

200

proteins

Higher organisms use nitrogen to make their what?

300

Classification that’s the formation of clouds, lighting , flow of water 

What is Chemical/ physical?

300

Coal. Oil . Natural gas

What deposits are burned as fossil fuels?

300

Water pollution 

Some of the phosphorus in soils can be washed away into what?

300

they can not

Can animals and plants directly use all the nitrogen found in our atmosphere?

400

Classification of mining and burning of fossil fuels, clearing of land and use of fertilizers

What is human activity?

400

Volcanoes 

What’s a natural source of CO2?

400

Rocks and minerals 

Where is phosphorus contained?

400

Nitrogen - fixing bacteria

What bacteria can directly use nitrogen in our atmosphere and “fix it” so other organisms can benefit ?

500

the action or process of classifying something according to shared qualities or characteristics.

What is classification?

500

Greenhouse effect 

Too much CO2 in the atmosphere may be responsible  for what Effect?

500

DNA

What’s an essential nutrient for life,as it makes up important chemical?

500

Denitrification bacteria

What bacteria in the soil can break down the amnonia into forms of nitrogen, which is not available for use by plants or animals?