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100

Another word for burning 

combustion

100

reflection

bouncing back of light

100

temperature at which liquid becomes a solid 

freezing point

100

temperature at which liquid becomes a gas

boiling point

100

temperature at which a solid becomes a liquid

melting point 

200

plant eating animals

herbivores

200

what does fuel need in order to burn?

oxygen

200

objects that makes its own light

luminous

200

refraction

bending of light

200

animal that eats mostly meat

carnivore

300

does not let light pass through 

opaque

300

amount of matter in any object 

mass

300

nymph

immature insect that looks like an adult

300

attraction that exists between any pair of objects 

gravity

300

geode

looks like a mudball

400

uranium

source of nuclear power 

400

mercury 

liquid at room temperature 

400

force that causes electrically charged objects to either attract or repel each other 

electricity 

400

wing-footed

pinniped 

400

blending in to surroundings 

camouflage

500

largest flying bird

wandering albatross 

500

when one object gives some or all of its energy to another objects, what takes place?

a transfer of energy

500

what are reefs made from?

coral polyps 

500

the higher the octane number of gas, the better the ? quality?

anti-knock

500

mammal that looks like a fish 

whale