| QuestionWhat | Answer |
|---|---|
| What's a catalyst ? | a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change. |
| Why is energy needed to do things in living things ? | They need power to stay alive. They need energy to perform functions such as growth, maintaining balance, repair, reproduction, movement and defense. |
| What are the properties of water ? | Boiling Point and Freezing Point.Surface Tension, Heat of Vaporization, and Vapor Pressure.Viscosity and Cohesion.Solid State.Liquid State.Gas State. |
| Why does diffusion occur ? | The way that cell diffusion happens is by molecules moving from an area of high concentration to an area of low concentration. |
| What is diffusion ? | The movement of molecules from a region of higher concentration to a region of lower concentration. |
| What is the function of an enzyme ? | They lower activation energy and increase the rate of chemical reactions. |
| What are enzymes ? | Catalysts for chemical reactions in living things. |
| Whats the lock and key model ? | Only one substrate (key) fits in the active site (key hole) which is the enzyme (lock). |
| What is a chemical reaction ? | a process that involves rearrangement of the molecular or ionic structure of a substance, as opposed to a change in physical form or a nuclear reaction. |
| Why do reactions occur ? | Reactions occur when two or more molecules interact and the molecules change. Bonds between atoms are broken and created to form new molecules. |
| Why are enzymes needed important in our bodies ? | Enzymes are proteins that control the speed of chemical reactions in your body. |
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