Earth science questions?

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Which of the following are processes of nitrogen and ammonia conversion that make nitrogen absorbable by plants?

a. nitrogen fixation, assimilation, and ammonification
b. assimilation, ammonification, and nitrification
c. nitrogen fixation, ammonification, and nitrification
d. nitrogen fixation, ammonification, and denitrification

In the nitrogen cycle, once a consumer gains nitrogen nutrients from animals or plants, it recycles these nutrients back to the earth by _____.
a. releasing waste and decomposition
b. respiration and assimilation
c. assimilation and decomposition
d. respiration and photosynthesis

For each boundary, choose the correct resulting formation or primary activity.
1. convergent [ ]ocean ridges and rift valleys
2. divergent [ ]ocean trenches and mountains
3. transform [ ]tremors and earthquakes

Select the best description for each cycle:
1. Hydrologic [ ]it's all about water
2. Rock [ ]erosion, deposition, metamorphism
3. Tectonic [ ]housed mostly in rock material
4. Carbon [ ]photosynthesis and respiration
5. Nitrogen [ ]it's all about special bacteria
6. Phosphorus [ ]subduction, uplift, and mantle convection

The _____ law of thermodynamics states that energy can't be created or destroyed. Two natural sources of energy on Earth are the _____.
a. First, Sun and core of Earth
b. Second, Sun and rock
c. Second, Sun and biosphere
d. Third, core of Earth and hydrosphere

Choose the pieces of evidence that supported the existence of Pangaea and continental drift theory.
a, Fossilized plants and animals of the same species found on separate continents.
b, Geological features, such as mountain ranges, that align on matching coasts of different continents.
c, Island arc ranges are still connected under the Atlantic Ocean.
d, Antarctica's glacial features are similar to the Arctic's.
 
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