water cycle
Water goes through the water cycle again and again, the amount of water on Earth always……
*Remains the same
Which is not abiotic:
--N
--protein
--H20
--C
*Protein
What type of Nitrogen makes up 78% of our air?
*Free
What living entity removes carbon dioxide from the air (CO2)?
*Trees/Plants
Another name for water…
*H20
What Percent of Earth is covered in water?
*70%
Which two processes are responsible for cycling Oxygen and Carbon?
*photosynthesis and cellular respiration
Why is fixed nitrogen so important for living organisms?
*All living organisms need nitrogen for necessary chemical reactions at the cellular level
What do we know about the total amount of carbon and oxygen found on planet Earth?
*They remain constant and are cycled through organisms and ecosystems
What is the only substance on Earth found in all three forms: solid, liquid and gas..
*water
At what temperature does water freeze?
*32 degrees Fahrenheit or 0 degrees Celsius
What happens when gasses, such as Carbon Dioxide, get trapped in our atmosphere?
*The temperature of our planet rises: known as the Greenhouse Effect
What is the role of decomposers in the nitrogen (N) cycle?
*They return N from dead organisms back to the soil
What process takes in Carbon and releases Oxygen?
*Photosynthesis
Which three factors are unique to Earth and supports life?
*Water, oxygen and temperature
Melting an ice cube into a liquid form is an example of what type of change?
*Physical
What two entities are responsible for making nitrogen useable for humans?
*Bacteria and lightening
What state of matter is nitrogen when it is in the atmosphere?
*Gas
What is the #1 activity of humans that adds large amounts of carbon dioxide to our atmosphere?
*Burning of fossil fuels
Name the two places where organisms are capable of obtaining oxygen
*Water and from the air
The percent of water on Earth that is suitable for consumption?
*1%
The process that turn liquid water into a gas?
*What is sublimation
How do we obtain fixed nitrogen?
*By eating Legume plants or organisms that have eaten the legume plants
Name the 4 major reservoirs where carbon is naturally stored on Earth?
*Rocks, dissolved in water, our atmosphere and in living organisms
What human activity increases the amount of nitrogen found in our soil?
*Use of fertilizers