1. Chemical Reactions Quiz

2. Q1: What temperature water would increases the number of molecular collisions?
A: Hot Water

3. Q 2: What were some indicators of the reaction in the MgO lab?
A: Bright light, smoke, corrosion, white color of MgO

4. Q 3: Photosynthesis happens when plants convert energy from the sun into ________ energy in the Glucose.
A: chemical
(use the two skateboards & p

5. Q 4: An exothermic reaction is when chemical bonds ________ energy, so it gives off heat.
A: Release

6. Q 5: Endothermic reactions are when new chemical bonds absorb heat energy, so the surroundings get _______.
A: Colder

7. Q 6: Reactants or Products are the molecules going in to a reaction?
A: Reactants
Product

8. A: carbon dioxide and water.
Q 7: When you light a candle, the wick oxidizes (combusts) producing heat, light, carbon dioxide and water. What are the products?
A: carbon dioxide and water.

9. A: Created or destroyed
Q 8: The law of conservation of matter states that matter cannot be ________ or __________ in a chemical reaction.
A: Created or destroyed

10. Q 9: Does temperature increase or decrease in an exothermic reaction?
A: Increase

11. Q 10: In the Transparent Gas lab, how did we test for carbon dioxide?
A: checked to see if it would put out a flame

12. Q 11: List 4 ways to speed up a chemical reaction:
A: Add heat, stirring/shaking, increase surface area, increase concentration

13. Q 12: List three general indicators that a chemical reaction has happened? Think about what you have observed in your labs
A: Light, Fizzing, Change of temperature, New smell, New color, Rust, Fire (explosion), etc…