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2026 7th grade science first quiz
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Matter
anything that has mass and takes up a space (volume)
Atom
A basic unit of matter.
Element
A substance made of one type of atom
Property
A characteristic of a substance
molecule
A particle made of multiple atoms
Density
The amount of mass packed into a given volume
Solid
Particles are packed closely together in an arrangement (Ex: Ice)
Liquid
Particles are close together but can slide past each other (Ex: Water)
Gas
Particles are far apart and fill their container (Ex: Water Vapor)
Structure affects properties
The way atom are arranged can affect the properties of a substance.
What are the differences between Diamond and graphite
The atom structure ,and graphite is soft and diamond is hard, diamond has a higher density