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ReactionsTestYr9
| Question | Answer |
|---|---|
| What are some examples of a chemical reaction? | -cooking -explosions -burning -blood clotting etc. |
| Do exothermic reactions give out or use energy? | Give out energy |
| What are three things that can increase molecular collisions? | 1. Higher Temperature 2. Higher Concentration 3. More Surface Area |
| If the temperature is higher the reaction rate is? | Faster. |
| What are the 3 states of matter? | -Solid -Liquid -Gas |
| What is a chemical reaction? | A chemical reaction is a reaction that forms new substances. |
| As the concentration goes lower the reaction rate gets? | Slower. |
| What is the law of conservation of mass? | The total mass of the reactants is always equal to the total mass of the products. |
| If there is more surface area, the rate of the reaction would be? | Faster. |
| What type of energy is released during an exothermic reaction? | Usually heat but also light, sound and electrical energy. |
| What type of reaction depends on energy to happen? | an Endothermic reaction for example photosynthesis or baking bread. |
| what are the two main types of reactions? | Physical and Chemical. |
| WHat are some examples of a physical reaction? | -Melting Ice -freezing ice -blending -crushing something like fruit or ice -evaporation |
| what is a physical reaction? | a reaction that can generally be reversed. it doesn't form any new substances. |
Created by:
Acaruso
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