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science 7g

What is the meaning of estimated? predicting something without being sure of it
What is a landfill site? large area where rubbish is left
Name three states of matter? Solid, liquid, gas
Describes 2 properties of a liquid? Liquids dont change their volume- they cannot be squashed. liquids are quite dense but usually less dense than solids.
what can happen if a gas cylinder is heated? it can explode
Are solids often dense yes
What state of matter does not flow? solid
why are gases stored in cylinders? so the gas cannot escape
What are gases less dense than? they are less dense than liquids
What is data? observations from experiments
What is a prediction? is when you think something is going to happen
What is a theory? if an idea has been tested and still works, it is called a theory
can gases be squashed? yes
What is a liquid? something with a fixed volume but no fixed shape
What is a gas? Something that does not have a fixed shape or volume, and is easy to squash
What is a solid? Something with a fixed shape and volume
Created by: nkruimer