| A | B |
|---|
| particulates | unburnt carbon |
| nitrogen monoxide | pollutant mainly from cars |
| combustion | correct term for burning |
| atom | smallest particle in a reaction |
| hydrocarbon | made from hydrogen and carbon |
| molecule | group of atoms |
| plate tectonics | this drives continental drift |
| galaxy | billions of stars |
| sulphur dioxide | dissolves in rain to make acid rain |
| Big Bang | start of the Universe |
| earthquake | caused by slipping tectonic plates |
| erosion | wearing away of rocks |
| seafloor spreading | key evidence for continental drift |
| asteroid | mini-planet |
| nuclear fusion | how stars release energy |
| hydrogen | main element in star |
| chromosome | most cells have 46 |
| Y chromosome | male chromosome |
| cystic fibrosis | genetic illness |
| recessive | opposite of dominant |
| nucleus | where chromosomes are in cell |
| alleles | versions of same gene |
| gene | our "instructions" |
| bb | genetic make-up of a blue-eyed person |
| clones | genetically identical living things |
