Changes of State
What occurs when a solid changes into a liquid?
Melting.
What occurs when a gas changes into a liquid?
Condensation
What is matter?
Matter is anything that has mass and takes up space.
List a physical property of water.
Colourless, odourless, tasteless, boils at 100, freezes at 0, not magnetic
What occurs when a liquid changes into a gas?
Evaporation
What is the temperature that water boils at?
100 degrees celsius
Explain what the particles in a liquid are like.
Spread out, moving around
List another physical property of water.
Colourless, odourless, tasteless, boils at 100, freezes at 0, not magnetic
What occurs when a gas changes into a solid?
Deposition
When an object is cooled, does it lose or gain thermal energy?
Loses thermal energy
Explain what the particles in a gas are like.
Moving around quickly in all directions
What is a property of a substance that can be observed without changing its chemical makeup?
Physical property
What occurs when a solid changes into a gas?
Sublimation
Explain what the particles in a solid look like.
Close together, organized
What is a physical change? Give an example.
A physical change is reversible and the chemical composition does not change. i.e. water freezing
What occurs when a liquid changes into a solid?
Freezing
Which state of matter has particles closely packed together?
Solid
What is a chemical change?
A chemical change is irreversible and involves a change in chemical composition. i.e. burning food in a fire