boiling point

boiling point:  the temperature at which a substance changes from a liquid to a gas 

The BOILING POINT of pure water is 100° Celsius.

conductor

conductor: a material that allows heat energy, electricity, or sound to pass through it easily

Speaker wire CONDUCTS sound.

Copper is a good CONDUCTOR of heat.

Saltwater is a CONDUCTOR of electricity.

density

density: the amount of mass in a known volume of an object or substance

density blocks

density of liquids

dissolve

dissolve:  to form a solution with another substance

Particles of 1 or more substances are evenly distributed in another to form a solution.

The antacid tablet is DISSOLVING in water.

electrical energy

electrical energy: a form of energy that consists of a flow of electric charges through a conductor

freezing point

freezing point:  the temperature at which a substance changes from a liquid to a solid

Metal melts and freezes at a much higher temperature. The FREEZING POINT of iron is 1535° Celsius!

The FREEZING POINT of pure water is 0° Celsius. Water also begins to MELT at 0°.

insulator

insulator: a material that does not let heat energy, electricity, or sound pass through it easily

Styrofoam is a good INSULATOR of heat energy.

magnetism

magnetism:  a force that pulls magnetic materials across a distance

mass

mass: the amount of matter in an object or substance

matter

matter: the material, or "stuff," that everything is made of

MATTER can be classified into three states: solid, liquid, and gas.

mixture

mixture:  a combination of two or more substances that can be separated by physical means

This fruit salad is a MIXTURE of blueberries, raspberries, strawberries, cantaloupe, and honeydew melon.

physical property

physical property: a property that can be observed, measured, or changed without changing the substance itself

PHYSICAL PROPERTIES, or characteristics, of matter can be observed with your five senses.

solubility

solubility:  a measure of how much of one substance will dissolve in another substance

Copper Sulphate powder is SOLUBLE in water.

These plant-based dyes are SOLUBLE in water.

solution

solution:  a mixture with one substance spread out evenly in another substance so that you cannot tell the two substances apart

Soda is a solution made up of water, sugar, flavorings, and gas.

Lemonade is a SOLUTION made up of water, sugar, and lemon juice.

thermal energy

thermal energy: the amount of energy in moving particles of matter; heat

Propane gas burners produce the THERMAL ENERGY that allows hot air balloons to rise.