Common Entrance Revision: Includes more advanced questions
30 questions suitable for scholarship               KS3 Levels 5 and 6

1. The diagram shows a human embryo.
Which label represents the placenta?
 
 
 
 
2. A solar eclipse happens when
 
 
 
 
3. Exactly enough sodium hydroxide solution is added to hydrochloric acid to make a neutral solution.
How can salt (sodium chloride crystals) be obtained from the resulting solution?
 
 
 
 
4. The circuit below shows 3 lamps (P, Q and R) and 4 ammeters (A1, A2, A3 and A4)
The lamps are all similar to each other.

ammetersA1 reads 0.3A
If A2 reads 0.2amps what will be the reading on A3?
 
 
 
 
5. What atoms is diamond made out of?
 
 
 
 
6. The diagram shows a distance time graph for a model car.
How fast was the car travelling during section A of the journey?
 
 
 
 
7. 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) 
 
 
 
 
8. The diagram shows a roller coaster car moving downwards quite fast.

Which force is making the car speed up (X or Y)?
 
 
9. Which of the energy changes below represents that which takes place in an electric motor?
 
 
 
 
10. measuring cylinder2This diagram shows a measuring cylinder being used to measure the volume of some water.

What volume of water is being measured?
 
 
 
 
11. What biological process releases oxygen into the atmosphere?
 
 
 
 
12. Sucrose is the chemical name for which common substance?
 
 
 
 
13. What chemical change will happen to copper foil when it is heated?
 
 
 
 
14. What sort of energy is produced by an electric motor?
 
 
 
 
15. 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.

Which pen has an ink made from 4 dyes mixed together?Chromatography_tank2
 
 
 
16. Taking cuttings, budding and forming runners are all examples of what process?
 
 
 
 
17. Cells reproduce by a process called binary fission.

Is binary fission an example of sexual or asexual reproduction?
 
 
18. Fill in the missing word from the equation shown below:
Acid + alkali     →    …………    +   water
 
 
 
 
19. forcesThe diagram shows a blue ball hanging from a string.

Which red force arrow best represents the force of gravity on the ball?
 
 
 
 
20. Name a non-metallic element that conducts electricity
 
 
 
 
21. C is the symbol for which chemical element
 
 
 
 
22. Pick an neutral oxide from the list
 
 
 
 
23. Why does iron go a pinky-brown when it touches copper sulphate solution?
 
 
 
24. An alloy of Copper and tin is called
 
 
 
 
25. 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
 

Did the magnesium gain mass, loose mass or not change in mass?
 
 
 
 
26. Complete the word equation for potosynthesis:Carbon dioxide + water   (+ sunlight)  → ………………..   ……………………..(put two ticks to indicate the two missing substances)
 
 
 
 
27. 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.

Chromatography_tank2What is the name of the process being carried out? 
 
 
 
 
28. How far does sound travel in 1 second
 
 
 
 
29. Fill in the missing word from the equation shown below:
Acid + metal    →  salt   +   …………
 
 
 
 
30. Why is the mineral Iron important in our diet?