"Y8 recap": HTML5 Crossword

Across

3. This is common metal - it is used in magnets. It has the symbol 'Fe' (4)
6. This metal is not very reactive, it has the symbol Cu (6)
7. Magnets have a north and south... (4)
8. To show the direction that a light ray travels in your can draw an _____ on the ray (5)
9. A type of acid we use a lot in school, has the symbol HCl (12)
12. We measure 'mass' in this unit (9)
15. The plant at the bottom of a food chain is given the name... (8)
17. On a distance-time graph, the faster an object is moving, the _______ the gradient will be (7)

Down

1. When light reflects, the angle of reflection is the same as the angle of ... (9)
2. When light refracts it changes speed and ... (9)
4. A piece of equipment used to measure the angles of rays (10)
5. This is the unit for 'force' (6)
10. To calculate the speed of an object you divide the distance by... (4)
11. A more reactive metal will ________ a less reactive metal in a reaction (8)
13. This is a reactive, silvery metal, with the symbol Mg (9)
14. On a distance-time graph, a horizontal line means the object has... (7)
16. Some metals react with water and oxygen - this produces brown/orange spots called ... (4)