Science Topic Test - Water

Solvent

The substance that dissolves another substance, like water in lemonade.

polar molecule

a molecule with a positive and negative end, like a magnet.

surface tension

the tight 'skin on the surface of a liquid caused by molecules sticking together.

adhesion

when different substances stick together, like water sticking to glass

Solute

The substance that is dissolved in a solvent, like sugar in lemonade.

solution

A mixture where a solute is evenly dissolved in a solvent.

density

How much mass is in a given volume, like how heavy a rock is for its size.

cohesion

When molecules of the same substance stick together, like water molecules sticking to each other.

atom

The basic unit of matter, like a tiny building block of everything around us.

Proton

A positively charged particle in the center of an atom.

Neutron

A neutral particle in the center of an atom that has no charge.

Electron

A negatively charged particle that orbits around the center of an atom.

molecule

A group of atoms bonded together, like a water molecule (H2O).

Diffuse

When something spreads out evenly, like ink spreading in water.

Indicator

A substance that changes color to show the presence of another substance, like a pH test strip.

Nucleus

The central part of an atom where protons and neutrons are found.

Residue

The remaining substance left after a process, like leftover sugar after dissolving.

Precipitation

Any form of water falling from the sky, like rain or snow.

I-C
D-M
C-S

independent-change
dependent-measure
Controlled-keep the same