Matter Basics
What is matter
Anything that has mass and takes up space.
What is a physical change?
A change in size, shape, or state that does NOT form a new substance
What is a chemical change?
A change that forms a new substance
__________ occurs when a solid changes into a liquid.
Melting
When an object is cooled, it…
Loses thermal energy
Which of the following is NOT matter:
a.) Water
b.) Light
c.) A rock
d.) Air
B.) Light
Which is a physical change: melting butter, burning paper, rusting metal, or baking bread?
Melting butter
Which is a chemical change: burning wood, breaking glass, boiling water, or freezing water?
Burning wood
__________ occurs when a liquid changes into a gas.
Evaporation
Which state of matter has particles closely packed together?
Solid
Which state of matter has a definite state and volume?
a.) Gas
b.) Solid
c.) Plasma
d.)Liquid
b.) Solid
What happens to particles when a solid melts?
They move faster and spread apart
What is one sign that a chemical change has happened?
A colour change (other acceptable answers: gas production, temperature change, new substance)
__________ occurs when a gas changes into a solid.
Deposition
What happens to particles when thermal energy is added?
They move faster
What do we call the tiny particles that make up all matter?
Atoms
Is cutting paper a physical or chemical change?
Physical change
Why is rusting a chemical change?
It forms a new substance (iron oxide)
__________ occurs when a solid changes into a gas.
Sublimation
Why does a metal spoon feel colder than a wooden spoon at the same temperature?
Metal conducts heat away faster
Which state of matter has particles that move the fastest?
Gas
Why is dissolving sugar in water a physical change?
The sugar can be recovered; no new substance forms
Why is baking a cake a chemical change?
New substances form when ingredients react
__________ occurs when a gas changes into a liquid.
Condensation
How does thermal energy affect particle speed?
More thermal energy makes particles move faster