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

1. A ball sitting at the top of the stairs has what kind of energy:
2. An alloy of Copper and tin is called
3. An animal carries out respiration in order to….
4. ARTHROPODS are animals that have which features?
5. Which of the gases named below is released by bacteria when things decompose and is a powerful greenhouse gas
6. What atoms is diamond made out of?
7. Why is it sensible to put antiseptic on a cut?
8. Which of the below is not an example of a chemical change?
9. Name the organ that supplies the embryo with food and oxygen
10. The diagram shows a human embryo.
Which label represents the placenta?
11. Where are ova (eggs) made in the human body?
12. How is a sperm different to an egg in a human?
13. Which chemical will gain in mass when heated?
14. Why do plants have stomata ?
15. Ca is the symbol for which chemical element
16. Word equations for 4 different reactions are shown.
Which of them shows oxidation and reduction taking place?
17. Akt_anim3  Bkt_anim2Ckt_anim1The blue circles in these diagrams repesent the particles in a substance

Which diagram represents a gas?
18. Bacteria and fungi help plants rot in the soil
True or false?
19. Why does a plant have root hairs on the root
20. Is Mercury metal a solid, liquid or gas?
(at normal room temperature)
21. antPick TWO features that show this animal to be an insect
22. Crude oil can be separated into different substances using what method of separation?
23. The term ‘ CERAMICS’ refers to what group of substances?
24. Why do we need red blood cells?
25. circulation-graphThe graph below shows the heart rate of two boys, X and Y

Their teacher measured their pulse and then asked them to run on a running machine for 2 minutes

When their pulse had returned to normal the experiment was stopped

How long did it take the heart rate of boy Y to return to normal after he stopped running?
26. The base of a brick measures 20cm x 8cm.

When resting on the ground it excerts a pressure of 0.125 N/cm2.

What is the mass of the brick?
(The Earth’s gravity excerts a force of 10 N/kg)
27. A block measures 10cm x 8cm x 5cm
You are told that the block is made out of iron which has a density of 7g/cm³

What is the mass in kg?
28. What do we mean by an animal being cold blooded?
29. Powdered wood charcoal (carbon) is mixed with copper oxide and heated strongly.
A red glow is seen to spread though the mixture. When the mixture has cooled a pink residue is seen.

The reaction above is an example of oxidation and reduction.

During this reaction, which chemical is being oxidised and which is being reduced?
30. 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?