States of Matter
What are the three common states of matter?
Solid, liquid, gas.
What change of state happens when ice turns into water?
Melting
What is the main natural source of light for Earth?
The sun
Sound is made by objects that are doing what?
Vibrating
Why do we see ourselves in a mirror?
Because light reflects off the mirror.
Which state of matter has a definite shape and definite volume?
Solid
What change of state happens when water turns into ice?
Freezing
What happens when light bounces off a surface?
Reflection
What travels through the air to carry sound to our ears?
Sound waves
Why do we hear thunder after seeing lightning?
Light travels faster than sound.
In which state of matter do particles move around freely and fill the entire container?
Gas
What change happens when liquid water turns into water vapour?
Evaporation
What do we call materials that allow light to pass through clearly?
Transparent
What part of the ear vibrates when sound waves hit it?
The eardrum
Why does a straw look bent in a glass of water?
Refraction
What state of matter has a definite volume but takes the shape of its container?
Liquid
What is it called when water vapour turns back into liquid water?
Condensation
What happens to light when it bends as it passes through water or glass?
Refraction
What happens to the pitch of a sound when vibrations are faster?
The pitch is higher
Why do soundproof rooms have foam on the walls?
The foam absorbs sound.
What do we call the tiny particles that make up all matter?
Atoms, molecules or particles
Is melting butter a physical change or a chemical change?
Physical Change
What type of object produces its own light?
A light source (e.g., Sun, flashlight, light bulb).
What do we call something that blocks or absorbs sound?
A sound barrier or sound absorber (e.g., foam, carpet).
Why does a drum make sound when you hit it?
The drum surface vibrates.