8A3 CHEMISTRY- 23/5/12

1. Write down the fire triangle (fuel, air, and heat supply) from the video you have just seen of a hybrid rocket:

2. What is combustion?

3. What is a fuel? List as many fuels as you can find.

4. Which gas in air is needed for burning?

5. What is an exothermic reaction?

6. Hydrocarbon fuels contain atoms of hydrogen and carbon. When hydrocarbon fuels combust, energy (heat/light), water and a gas is given off. What is this gas?

7. Petrol used in cars is an example of a hydrocarbon fuel. What happens to the petrol in our cars?

8. Methane is the gas fuel we use in our Bunsen burners at school.

a) Where does the fuel come from?

b) Where does the air come from?

c) Complete the equation for the combustion of methane gas.

Methane + oxygen -->

9. Try and write a balanced chemical equation for this combustion reaction. (Hint methane= CH4)

10. Can you balance the equation so both sides have equal atoms of each element?

8A3 CHEMISTRY- 9/5/12

1. What is an element? Give an example

2. What is a compound? Give an example

3. What is a mixture? Give an example

4. Give 3 properties of metal elements?

5. Give 3 properties of non-metal elements?

6. It is important to get chemical symbols correct! CO is the symbol for Carbon Monoxide and Co is the symbol for Cobalt!  What is the correct chemical symbol for magnesium?

 Mg        MG        mG         mg

7. What is the chemical symbol for oxygen?

8. Magnesium and oxygen are the two reactants for the combustion of magnesium. Write down the word equation for this chemical reaction including the reactants and final products.

9. Do you think the mass of magnesium oxide is lighter, the same or heavier after the magnesium is burned? Explain your answer?

10. What does the periodic table represent? Is it a table of elements, compounds or both?

When you have finished the quiz:

Try ACTIVITY for ATOMS AND ELEMENTS and COMPOUNDS AND MIXTURES found at:

http://www.bbc.co.uk/schools/ks3bitesize/science/chemical_material_behaviour/