Newton’s 3 Laws of Motion

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Newtons 1st Law

Inertia
An object will stay still or keep moving unless an unbalanced force acts on it.

Sounds like “in a chair” — you stay sitting in a chair until something makes you move.

Newtons 2nd Law

Force = Mass × Acceleration
The more force you use, the more an object accelerates. Heavier objects need more force to move.
Hint: F = ma sounds like “fast mouse accelerates” — Force, Mass, Acceleration.

Newtons 3rd Law

Action and Reaction
For every action, there is an equal and opposite reaction.
Hint: Act → React — when you push something, it pushes back.

What are the stages of mitosis and what is it used for?

Mitosis stages are Interphase, Prophase, Metaphase, Anaphase, Telophase, and Cytokinesis. Mitosis is used for growth, repair, replacing old cells, and making identical body cells.

What are the stages of meiosis and what is it used for?

Meiosis stages are Interphase, Prophase I, Metaphase I, Anaphase I, Telophase I, Cytokinesis, then Prophase II, Metaphase II, Anaphase II, Telophase II, and Cytokinesis. Meiosis is used to make sex cells, which are sperm and egg cells with half the normal number of chromosomes.

What happens in interphase?

The cell grows, does its normal jobs, and copies its DNA so it is ready to divide.

What happens in prophase?

The DNA coils up into visible chromosomes, and the nucleus starts to break down.

What happens in metaphase?

The chromosomes line up in the middle of the cell.

What happens in anaphase?

The chromosomes are pulled apart to opposite sides of the cell. By spindle fibres

What happens in telophase?

New nuclei form around the chromosomes at each side of the cell.

What happens in cytokinesis?

The cell splits into new cells. In mitosis, it makes 2 identical cells. In meiosis, it eventually makes 4 different sex cells.