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Carbon
Nitrogen
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100
Burning fossil fuels releases what into in the air?
What is Carbon?
100
78% of the gases in the atmosphere?
What is Nitrogen
100
Energy from the sun enters an ecosystem when a plant uses sunlight to make sugar molecules
What is photosynthesis?
100

The name AND measurement of the scale used to determine acidity.

What is the pH scale, from 0 - 14.

200
Carbon returns to the atmosphere as what?
What is Carbon Dixiode?
200

Stage 1 in the Nitrogen Cycle

What is Nitrogen Fixation?

200
an organism that makes it's own food
What is a producer?
200

An animal whose eyes are larger than its brain.

What is an ostrich?

300
An effect of Carbon Releasing in the atmosphere
What is Global Warming?
300
a process in which nitrogen is cycles between the atmosphere,bacteria,and other organisms.
What is the Nitrogen cycle?
300

The maximum amount of a species that an ecosystem can sustain

What is carrying capacity?

300

In WHMIS and HHPS these are the 4 shapes used as borders for hazard symbols

What are triangles, diamonds (or squares), octagons, and circles? 

400

CO2 levels have increased from _____ to _____ in the past 150 years.

270 parts-per-million to 400 parts-per-million

400

The chemical formula for Nitrogen

What is N2?

400
A sequence in which energy is transfered from one organism to another and each other organism eat another
What is a food chain?
400

This outdoor tool was first invented to assist with childbirth.

What is a chainsaw?

500
is the movement of carbon from nonliving enviroment into living things and back
What is Carbon Cycle?
500

During nitrification, nitrogen is converted into these chemicals. 

What are nitrogen dioxide (NO2−), and nitrates (NO3−)

500

Another name for decomposers, which obtain energy from detritus.

What are detritivores?

500

While helium makes your voice higher, this chemical makes your voice much lower. 

Sulfur Hexaflouride