1. 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

 

What mass of oxygen did the magnesium react with? 

2. 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

 

What is the word equation for the reaction that takes place?
 

3. Taking cuttings, budding and forming runners are all examples of what process?

4. A car is travelling at 60km/h
How far will it travel between 9.00am and 10.00am?

5. Methane is a gas produced when rubbish rots.

Why is it bad to release lots of methane into our atmosphere?

6. What organ in our body contains valves?

7. If you were suffering from hypothermia what would be wrong with you?

8. Which of the below is not an example of a chemical change?

9. Which part of our body removes soluble waste and excess water from the blood

10. Which of the following would not be found in the nucleus of an atom?