Years 5&6

3. to prevent passage of and cause to change direction
6. the quality of being hot; high temperature
10. many of these compounds are _______________ reactive
11. power derived from the utilization of physical or chemical resources especially to provide light and heat or to work machines.
14. cause (something) to pass on from one person or place to another
15. a thread or a structure or object resembling a thread

1. not able to be seen through
2. the degree or intensity of heat present in a substance or object.
4. allowing light but not detailed shapes, to pass through
5. very quickly; at a great rate
7. a hard, unreactive colourless compound which occurs as the mineral quartz and as a principal constituent of sandstone and other rocks.
8. a loose granular substance
9. relating to heat
12. a substance that flows freely but is of constant volume
13. eliminated or discarded as no longer useful or required