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