Water (H2O) molecules enters the atmosphere as H2O vapor from the land and oceans, lakes, and rivers through the process of ________________________.
What is evaporation
100
Some waste and dead organisms remain underground for many years and turn into ________________________.
What are fossil fuels
100
Why is nitrogen important for plants and animals?
Nitrogen helps to build proteins and DNA in plants and organisms.
100
Humans release excess __________ into the air by burning fuels which can create pollution like smog or acid rain.
What is nitrogen
100
We burn fossil fuels for energy and release carbon back into the _______________________.
What is the atmosphere
200
Water can also evaporate from plants through the process of ________________________.
What is transpiration
200
Plants and animals go through ________________________ where they break down food for energy and release carbon dioxide into the atmosphere.
What is cellular respiration
200
Why are bacteria an important part of the nitrogen cycle?
Bacteria "fix" the nitrogen in the soil into useable nitrogen.
200
Water that accumulates into the land is called ___________________.
What is groundwater.
200
Humans add nitrogen to the biosphere by using ____________. Excess ___________ is carried into surface water or groundwater by precipitation which causes producers like _________ to grow rapidly.
What is fertilizers, fertilizers & algae
300
Some precipitation is absorbed into the soil in the process of ________________________.
What is percolation.
300
One human activity that can disrupt the carbon cycle is:
a. deforestation
b. planting more trees
c. burning more fossil fuels
What is a. deforestation.
300
Nitrogen gas travels from the _______ to the ______ and enter the nodules on the roots of certain plants
AIR SOIL
300
When the droplets become large enough, they fall to Earth’s surface as ________________________ in the form of rain, snow, sleet, or hail.
What is precipitaiton
300
On land, some precipitation flows along the surface in what scientists call________________________.
What is run off.
400
As these organisms release waste or die, they are broken down by ________________________ and carbon is released into the air.
What are decomposers
400
Bacteria turn nitrogen gas into a different type of nitrogen, ___________, in a process called ____________ _________
What is ammonia and nitrogen fixation
400
Nitrogen travel to _____________ by eating plants and passing it through the _________ ___________.
What is consumers & food chain
400
Carbon is passed through the ________________________ as plants are eaten by primary consumers, which are then eaten by secondary consumers.
What is food chain
500
If the air carrying it cools, ________________________ occurs and H2O vapor turns into tiny droplets that form clouds.
What is condensation
500
Plants take in carbon, along with light and water, to create food through the process of ________________________.
What is photosynthesis
500
in a process called nitrification, other bacteria in soil turn toxic ammonia into different types of usable nitrogen, _______________ & _______________.
What are: nitrites and nitrates
500
When plants and animals die or excrete waste, __________________ break down them and release nitrogen back into the air in a process called ___________.
What is decomposers & denitrification
500
Plants absorb the usable nitrogen from the soil in a process called _______________.