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Science
Definitions 2nd year (IRELAND)
Term | Definition |
---|---|
Energy | The ability to work |
Metabolism | All the chemical relations that occur in the cells of an organism |
Enzyme | Biological catalyst (chemical in every living thing that cause a reaction) |
Photosynthesis | The way that green plants make their food |
Producers | Organisms that make their own food |
Respiration | The release of energy from food |
Scalar quantities | Have a magnitude (size) and do not take place in any direction |
Vector quantities | Have magnitude and direction |
Displacement | The distance an object travels in a certain direction |
Velocity | The speed of an object and the direction it is travelling in |
Collision theory | Before a chemical reaction happens the particles in the reactant must collide with each other |
Acids | Substance which turns blue litmus red |
Bass | Substance which turns red litmus blue |
Alkali | A base that dissolves in water |