Matter Basics
Anything that has mass and occupies space is called this.
Matter
This state of matter has a definite shape and a definite volume.
Solid
A solid changes into a liquid.
Melting
Gold is an example of this type of pure substance.
Element
This instrument measures mass.
Balance or digital scale
This is an example of matter found inside a balloon.
Air
This state has a definite volume but takes the shape of its container.
Liquid
A liquid changes into a solid.
Freezing
Water, H₂O, is classified as this because hydrogen and oxygen are chemically combined.
Compound
An object has a mass of 24 g and a volume of 8 cm³. Find its density.
3 g/cm³
This property measures the amount of matter in an object.
Mass
This state expands to fill all the available space in a container.
Gas
A liquid changes into a gas.
Evaporation or vaporization
Salt completely dissolved in water forms this type of mixture.
Homogeneous mixture
Water rises from 30 mL to 42 mL when an object is submerged. Find the object's volume.
12 mL
This is the difference between a physical change and a chemical change.
A physical change does not create a new substance; a chemical change does.
Name the three common states of matter.
Solid, Liquid, Gas
A gas changes into a liquid.
Condensation
Sand mixed with water forms this type of mixture.
Heterogeneous mixture
State the formula used to calculate density.
Density = mass ÷ volume
Ice melts into liquid water. Explain why this is a physical change.
The substance remains water; only its state changes.
Explain why a gas can fill a closed container while a solid keeps its shape.
Gas particles move freely and spread out; solid particles remain in fixed positions and vibrate.
A solid changes directly into a gas without becoming a liquid first.
Sublimation
Explain the difference between an element and a compound.
An element contains one type of atom; a compound contains two or more elements chemically combined.
Compare mass and weight, including what each measures and their commonly used SI units.
Mass measures the amount of matter in kilograms (kg); weight measures gravitational force in newtons (N).