1. Which single piece of apparatus would be the best to use if you wished to find the volume of glass in a glass stopper

2. Jane has two bowls on her bench.
One contains fine brown sugar. The other contains sand.
To find out which was which she stirred each into some warm water. Which will dissolve?

3. You have four substances which you label A, B, C and D.
One is a mixture, one a metallic element one a non-metallic element and one a compound.

They have the following properties:

A	A yellow, crumbly solid that burns to form a single, colourless gas which turns universal indicator red.
B	A grey, malleable solid that burns to form a single, white, alkaline oxide.
C	A colourless liquid. The liquid is warmed in a shallow dish and after a few minutes a white residue is seen.
D	A green solid that decomposes when heated to form a colourless gas and leave a black powder.

Which of the substances is likely to be a compound ?

4. Word equations for 4 different reactions are shown.
Which of them is an example of a displacement reaction?

5. If a bar of chocolate is left in the sun what will happen to it?

6. Name a chemical that decomposes to release carbon dioxide when it is heated

7. What is the word equation for the reaction between copper and oxygen

8. Peter has three coloured felt pens which he labelled A, B and C.
He used the apparatus below to separate the dyes used to make colours from each of the pens.

What is the name of the process being carried out? 

9. What colour is magnesium oxide?

10. A liquid with a pH of 6 would be described as .....

11. Which of the below is a fossil fuel?

12. About 20cm of magnesium ribbon is chopped up into 1cm lengths and placed in a crucible which is then weighed along with its lid.

The crucible is heated strongly and the lid gently raised avery few seconds.

When the reaction is over the crucible + contents + lid are all re-weighed

These are his results:

• Mass of empty crucible + lid  = 51.2g
• Mass of crucible + lid + magnesium (before heating) = 54.3g
• Mass of crucible + lid + contents (after heating) = 54.7g

 

The lid is important in this experiment.
If the lid was not used how would this effect the results? 

13. About 20cm of magnesium ribbon is chopped up into 1cm lengths and placed in a crucible which is then weighed along with its lid.

The crucible is heated strongly and the lid gently raised avery few seconds.
When the lid was raised a bright glow was seen to spread through the mixture

When the reaction is over the crucible + contents + lid are all re-weighed.
A white ash remains in the crucible.

These are his results:

• Mass of empty crucible + lid  = 51.2g
• Mass of crucible + lid + magnesium (before heating) = 54.3g
• Mass of crucible + lid + contents (after heating) = 54.7g

 

What evidence is there that a chemical change is taking place?
(read all options before answering) 

14. What solid is formed when limestone is heated?

15. Substances can be obtained from the ground and purified in a variety of ways.

Which common metal is exctracted by heating its ore to a high temperature with coke (carbon) in a blast furnace.

16. Crude oil can be separated into different substances using what method of separation?

17. Some plastic is bio readable.

What does biodegradable mean?

18. What colour is sulphur?

19. Is water an element compound or mixture?