Key stage 3 Science Exercise
1. Particles move from high concentration to low concentration area in __________ .
2. When gas is heated it's particles move _________ .
3. The number of mass does not _______ during chemical reaction.
4. Push or pull can be a ________ .
5. Forces work in _______ .
6. Forces can be balanced or ________ .
7. When two equal size forces acting in opposite direction on an object are called ______ .
8. When two different size of forces acting on an object are called ________ .
9. Forces are measured by a device called _______ .
10. The unit of force is _______ .
11. Speed is how fast somebody is moving in a certain __________ .
12. The most common unit of speed is _________ .
13. Friction is a force that works in __________ direction to movement .
14. Friction slows down The _________ of moving objects .
15. Friction prevents our feet from _________ all over the place.
Answers:1. diffusion 2. quickly 3. change 4. force 5. pairs 6. unbalanced 7. balanced forces 8. unbalanced forces 9. force meter 10. newton 11.time 12. kilometre per hour 13. opposite 14. speed 15. sliding