Answer:
The photoelectric effect
Explanation: hope it helps
You have to start listing from the bottom :
3. Secondary Consumers
2. Primary Consumers
1. Producer
An independent variable<span> is the </span>variable<span> that is changed or controlled in a scientific </span>experiment<span> to test the effects on the </span>dependent variable<span>. </span>
NH₄Cl → NH₄⁺ + Cl⁻
NH₄⁺ (the ammonium cation)
List of different types of forces:
Gravity
Push
Pull
Friction
Magnetism
Net force
Momentum