Light
This is a form of energy that allows us to see objects around us.
Light
This is energy that we can hear.
Sound
Which produces light but not heat?
Phone or tablet
Everything around us that has mass and takes up space is called this.
Matter
A change where a substance changes form but stays the same substance.
Physical Change
Name one natural source of light.
Sun, fireflies, lightning, stars
Sound is made when objects do this back-and-forth motion.
Vibrations
The speed of light is approximately this fast.
300,000 km/second
Matter is made of tiny particles called these.
Atoms
A change that creates a new substance.
Chemical change
Name one artificial source of light.
Light bulb, flashlight, tablet, phone
This word describes how loud or soft a sound is.
Loudness
Which is a natural source of light? Sun or flashlight?
Sun
This state of matter has particles packed very closely together.
A solid
When a solid changes into a liquid, it is called this.
Melting
Light bouncing off the surface of a material is called this.
Reflection
This device helps protect your ears from hearing damage.
Ear plugs
Which change is a chemical change? Cutting paper or burning wood?
Burning wood
When water reaches this temperature, it boils.
100 degrees c
When a liquid changes into a gas, it is called this.
Evaporating
Light passing through an object and bending is called this.
Refraction
Which is a higher pitch sound? Whistle or Thunder?
Whistle
Which state of matter has particles far apart? Solid, liquid or gas?
Gas
This state of matter spreads out to fill the entire container.
Gas
Water vapour cooling and turning into liquid water is called this.
Condensation