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Newton's second law of motion is F = ma, or force is equal to mass times acceleration. Learn how to use the formula to calculate acceleration.

Learn about Newton's third law of motion, which states that for every action there is an equal and opposite reaction. Look at multiple examples that illustrate this law, including pushing a block on ice, pushing against a desk, walking on sand, how rockets work, and how an astronaut could save themselves from drifting in space.

The phases of Meiosis.

Explanation of the phases of mitosis

Details on the light-dependent reactions of photosynthesis

C-4 Photosynthesis: How some plants avoid photorespiration