Absorb

Amplitude

Axis

Boiling Point

Celsius Scale

Convection Current

Crater

Density

Frequency

Heat Energy (Heat)

Hemisphere

Hertz

Metal

Normal

Oscillate

Oscilloscope

Penumbra

Phases

Pitch

Planet

Pressure

Prism

Radiation

Reflect

Reflected

Refraction

Rock Planet

Scatter

Season

Signal Generator

Solar Eclipse

Lunar Eclipse

Image

Incident

Infra-red Radiation

Lens

Sound Insulation

Sound Wave

Sound-level Meter

Spectrum

Speed of Light

Star

Supernova

Temperature

Thermal Conductor

Thermal Insulator

Thermometer

Transmit

Umbra

Upthrust

Vibrate

Decibel

Energy