Problem: - Magma comes up to the surface of the earth - The magma cools - Particles inside the magma move closer together - Crystals are formed What might be the last step of the process?

A: The crystals contain minerals.

Problem: - A male and female bird mate - The female lays eggs - The eggs are incubated by the parents, by sitting on them, for weeks - The bird hatches from an egg - The parents feed them as the continue to grow - Develop flight feathers - The parents teach them to fly - After learning to fly they leave the nest to live on their own What might be the last step of the process?

A: The next year they breed beginning the cycle again

Problem: - A tree produces seeds - The seeds are dispersed by wind, animals, etc - The seeds reach the ground - Grow into new trees - These new trees produce seeds What might be the last step of the process?

A: The process repeats itself over and over

Problem: - Sunlight hits chloroplasts in the plant - The energy from the sunlight causes an enzyme in the plant to break apart the water - The water breakes into oxygen, hydrogen, and electrons - Hydrogen, along with electrons energized by light, converts NADP into NADPH What might be the last step of the process?

A:
Oxygen diffuses out of the plant as a waste product of photosynthesis