Y8 Science midyear review

2. A very standard piece of chemistry equipment. Holds liquids.
3. (2Words) You must keep these constant during an experiment.
4. (2Words) Small narrow glass container used for small samples in chemistry.
5. _____ law. When the force applied to a an object is proportional to the extension.
9. Test for carbon dioxide, turns milky if CO2 is present.
10. The units for energy.
12. Degrees ______, the units for temperature.
17. Increasing this usually speeds up a reaction.
18. Biological catalysts.
19. A reaction when a substance is burnt in a presence of oxygen to produce carbon dioxide and water.
20. A force that always acts in the opposite direction to the motion. Solid against solid.

1. Thermal ______. When metal carbonates are heated, reaction produces a metal oxide and CO2.
6. A shape which is good at "cutting through" a fluid with reduced drag.
7. The units for force.
8. Measures force.
11. A reaction where heat is taken in from the surroundings because the energy of the products is higher than the reactants.
13. A reaction where heat is released to the surroundings because the energy of the products is lower than the reactants.
14. Something that causes a reaction to speed up without being used up in a reaction.
15. Interact to become products.
16. A force due to fluid particles hitting an object as it passes through. Only present when there is motion.