Drag each tile to the correct box.
Arrange these steps in the nitrogen cycle in the correct order to explain how nitrogen from the atmosphere cycles through the other spheres on
Earth
biosphere
dead organic mater
nitrogen fixation
denitrification
ammonification
nitrification - yielding nitrate
nitrification - yielding nitrite

Why do we perceive objects as retaining their brightness under different lighting levels?

An ecologist studied the same species of deer during the summer and the winter. she noticed that during the summer, when there was plenty of food, the deer were energetic and playful. however, during winter when food was scarce, the deer moved more slowly and did not run unless they needed to escape a predator. which scientific fact is best supported by her observations?

In what part of the body does the most muscle activity happen?