1. Which of the following is NOT caused by bacteria

2. After filtering a mixture what do we call the liquid that drips through the filter paper?

3. The diagram shows a roller coaster car moving downwards quite fast.

Which force is making the car speed up (X or Y)?

4. A ball is held in place at the top of a slope at position X
When the ball is released it rolls down the slope, eventually coming to rest at position Z

Accoding to the law of conservation of energy, energy can never be created or destroyed so in what form does the energy exist at postion Z?
 

 

5. What is the heart for?

6. In which of the circuits shown will the bulb (or bulbs) be the brightest?

7.  

The diagram shows a parachute falling at a steady speed.

There are two forces on the parachute represented by red arrows

Which force is bigger?

8. What gas is used up by plants during photosynthesis

9. 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 non-metallic element ?

10. The diagram shows a parachute falling.

What is the name of the force labelled X?

11. What type of animal is a 'Portuguese Man of War'?

12. Where are seeds made in a flowering plant?

13. Which of the following is NOT a metal

14. What gas is produced when calcium carbonate is added to dilute hydrochloric acid?

15. Burning magnesium will react with carbon dioxide to produce a white smoke and leave small black specks of carbon.

What would be the products of the reaction between magnesium and carbon dioxide gas?

16. What is the name of the force which causes a moving car to slow down?

17. 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?
 

18. A change of electrical energy into kinetic (speed) energy could be produced by

19. Sam notices drops of water forming on the mirror when he was having a bath.

What name best describes these droplets?

20. What will iodine do when heated in an open test tube?