A strong shiny material, like iron or gold
Metal
One of a kind, special
Unique
Like something else
Similar
Very interesting and exciting
Fascinating
The air around the Earth that we breathe
Atmosphere
To turn around
Spin
The outside, the top of something
Surface
Something that lasts forever
Permanently
Or person or thing that carries a message
Messenger
Empty spaces or holes
Hollows
A vehicle that travels in space
Spacecraft
Staying alive
Survival
The best or most important
Ultimate
A process where gases in Earth’s atmosphere trap heat
Greenhouse effect
A gas that people and animals breathe out
Carbon dioxide
