States of Matter
What are the three states of matter?
Solid, liquid, and gas
What happens to particles in a solid when it melts?
They move faster and spread out more
Which is an example of a physical change: ice melting or wood burning?
Ice melting
What do we use to measure temperature?
→ A thermometer
Which layer of the Earth do we live on?
→ The crust
Which state of matter has a definite shape and volume?
Solid
When water freezes, what state of matter does it become?
Solid
Which is a chemical change: cutting paper or baking bread?
Baking bread
What happens when thermal energy is added to matter?
→ Particles move faster
What are the four main layers of the Earth from the outside to the inside?
→ Crust, mantle, outer core, inner core
Which state of matter takes the shape of its container but has a definite volume?
Liquid
What happens during freezing?
A liquid changes to a solid
Which is NOT a physical change: folding paper or an apple turning brown?
→ An apple turning brown
What happens to water particles when water boils?
→ They speed up and move far apart
The inner core is mostly made of what?
→ Metal (iron and nickel)
Which state of matter has no definite shape or volume?
Gas
What is melting?
When a solid changes to a liquid
When bread toasts and turns brown, what type of change is it?
→ Chemical change
Which describes particles in a gas?
→ They move quickly and are far apart
What is the name of the hot, melted rock inside a volcano?
→ Magma
What is matter?
Anything that has weight and takes up space
What is solidification?
When a liquid turns into a solid
What is a substance?
→ A specific type of matter with the same properties throughout
When ice cream melts, what causes this change?
→ The ice cream gains heat
What are the large pieces of Earth's crust called?
→ Tectonic plates