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science 7g
Question | Answer |
---|---|
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 |