This is the evaporation of water from the leaves of plants.
What is transpiration
100
All organisms require nitrogen to make amino acids which are used to build this.
What are proteins?
100
Producers obtain carbon dioxide from _________ during photosynthesis.
What is the atmosphere?
100
Molten rock that exists below the surface of the Earth.
What is magma?
100
The phosphorus cycle links the spheres of Earth except ___.
What is the atmosphere?
200
Water enters the atmosphere as this.
What is water vapor?
200
Nitrogen gas makes up this percentage of Earth's atmosphere.
What is 78 percent?
200
Human activities, such as burning fossil fuels, release carbon dioxide into the atmosphere. This has increased the level of carbon in the atmosphere by this percentage in the last 100 years.
What is 25 percent?
200
Molten rock solidifies into ____.
What is igneous rock?
200
The presence of excess nutrients, such as nitrates and phosphates, in wetlands (ponds, marshes, lakes, etc.)
What is eutrophication?
300
The process by which water changes from liquid form to an atmospheric gas.
What is evaporation?
300
Only certain types of ______ can use nitrogen gas directly.
What are bacteria?
300
Consumers obtain carbon in the form of _____________ by eating producers.
What is carbohydrates?
300
The type of rock that contains remains of once living things.
What are organic sedimentary rocks?
300
The mineral rich in phosphorus.
What is apatite?
400
Water vapor becomes tiny droplets that form clouds.
What is condensation?
400
The conversion of nitrogen gas into ammonia is this process.
What is nitrogen fixation?
400
Carbon is found in this form in the ocean.
What is calcium carbonate? OR What is dissolved carbon dioxide?
400
Rocks that are formed when other rocks are subjected to heat and pressure in the Earth.
What are metamorphic rocks?
400
The method, common to the nitrogen, carbon and phosphorus cycles, by which phosphorus can be transferred to the soil.
What is decomposition?
500
When water droplets that form clouds are large enough, the water returns to Earth's surface in this form.
What is precipitation?
500
Soil bacteria convert nitrates into nitrogen gas in this process.
What is denitrification?
500
Geochemical processes, such as ____________ and volcanic activity release carbon dioxide to the atmosphere and oceans.
What is erosion?
500
The rock cycle links the atmosphere through ___, ___ and ___.
What are volcanic eruptions, uplift and weathering?
500
The effect of an algal bloom on an aquatic ecosystem is ___, which can cause that aquatic ecosystem to die.