States of Matter
What are the three main states of matter?
Solid, liquid, gas
What is a physical change?
A change in the form or appearance of matter without changing its composition.
What is a chemical change?
A change that creates a new substance with different properties
What does it mean to conserve matter?
Matter cannot be created or destroyed, only changed in form
What is matter made of?
Atoms
Which state of matter has a definite shape and volume?
Solid
Is melting butter a physical change or a chemical change?
Physical change
What is one sign that a chemical change has happened?
Production of gas, color change, temperature change, or formation of a new substance
What happens to the total mass in a chemical reaction?
It stays the same
What property of matter is measured in grams or kilograms?
Mass
What happens to particles in a liquid when it turns into a gas?
They move faster and spread apart
What happens to the mass of an object when it is broken into pieces?
The mass stays the same
Is rust forming on metal a physical or chemical change?
Chemical change
If you mix two substances and they produce a gas, does the total mass change?
No, the mass stays the same because the gas is still part of the system
What do we call the amount of space an object takes up?
Volume
Name one example of matter that can exist in all three states.
Water (ice, liquid water, steam)
Why is tearing paper a physical change?
Because the paper’s composition does not change; only its size and shape change.
What gas is released when vinegar and baking soda are mixed?
Carbon dioxide
What tool can you use to measure the mass of matter before and after a reaction?
A scale or balance
What state of matter has particles that move the fastest?
Gas
Which state of matter can take the shape of its container but has a definite volume?
Liquid
What type of physical change occurs when water turns into ice?
Freezing
Why is baking a cake an example of a chemical change?
Because new substances are formed, and the process cannot be reversed.
If you burn a piece of paper and it turns into ash and smoke, is matter conserved? Why?
Yes, because the ash and smoke together equal the mass of the original paper.
What is the term for changing from a gas to a liquid?
Condensation