whole chapter 1 science <3

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Observing

Noticing something by using your senses

Substance

Anything that has mass and takes up space

matter

Anything that has mass and takes up space

Properties of a substance

Unique characteristics of a substance

Density

How much matter is packed into a given area

Particle

A small piece of matter

Sound

Energy that is created by vibrations

Sound frequency

The measure of the speed of the vibrations

Pitch

The highness or lowness of a sound, caused by frequency

Wavelength

The distance between one full wave

Amplitude

The height of a wave

Light

A form of energy that travels in waves

Visible spectrum

All colors of light seen with the naked eye

reflect

To bend back light or heat

absorb

To soak up or take in

Atom

Smallest particle of a substance that still has the characteristics of the substance

Molecule

A particle that is made up of atoms

Photosynthesis

The production of glucose and oxygen by plants