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Something that does not have a fixed shape or volume, and is easy to squash.
Something with a fixed volume but no fixed shape.
A description of how a material behaves and what it is like. Hardness is a property of some solids.
Something with a fixed shape and volume.
A word that describes, or gives information about a noun.
A type of adjective that compares two things or people.
A type of adjective that compares one thing or person within a group of things or people.
Rainwater that is more acidic than usual due to air pollution.
Substances that attack metals, stonework and skin are called corrosive.
To be squeezed into a smaller volume.
A unit used for measuring volume.
Easily set on fire.
Move and change shape smoothly.
Fuel formed from once living material over millions of years, e.g. coal, oil or natural gas.
Something that could cause harm.
States of matter
There are three different forms that a substance can be in: solid, liquid or gas. These are the three states of matter.
The amount of room something takes up. Often measured in cubic centimetres (cm3).
Observations collected in experiments.
Information that is used to support a hypothesis or theory.
An idea which explains how or why something happens.
What you think will happen in an experiment.
A way scientists use observations, hypotheses, predictions and experiments to produce theories to explain the things they see around them.
A hypothesis or set of hypothesis that explains how and why something happens. The predictions made using a theory should have been tested on several occasions and always found to work.
Something that you see happening.
Theory used to explain the different properties and observations of solids, liquids and gases.
The tiny pieces that everything is made out of.
Having no regular pattern.
Erratic movement of small specks of matter caused by being hit by the moving particles that make up liquids or gases.
unit of length: 1 nanometre = 0.000 000 001 metre
Scale for measuring very small particles:1 nanometre (nm) = 0.000 000 001 metre (m)
When particles spread and mix with each other without anything moving them.
The force on a certain area caused by air molecules hitting it.
A completely empty space, containing no particles.
Leaving dead plant material to rot.
The act of burning something. Used as a method of dealing with waste.