First Six Weeks Vocabulary List 1

Matter Anything that has mass and takes up space Can be divided into three categories: Solid Liquid Gas

Solid Matter that has a definite shape and definite volume

Liquid Matter that has a definite volume but no definite shape

Gas Matter that has no definite shape or volume

Reacts How something acts or behaves; responds Example: You give a dog a bone every time he sits. Every time you ask him to sit, he thinks you are going to give him a bone.

Response Answer Example: You responded correctly on the test on every question, so you got a 100!

Evaporation Liquid changes into a gas by adding heat; particles escape from a non-boiling liquid and become a gas

Condensation Gas changing to a liquid by taking away/removing heat

Melting A solid changes to liquid by adding heat Salvador Dali’s “Melting Clocks”

Boiling A liquid changes to gas by adding heat

Freezing A liquid changes into a solid by taking away/removing heat

Melting point of ice 0 degrees Celsius

Boiling point of pure water 100 degrees Celsius

Freezing point of pure water 0 degrees Celsius

Melting point (of anything) Temperature at which it changes from a solid to a liquid Example: The melting point of gold is 1063.43 degrees Celsius

Boiling point (of anything) Temperature at which it changes from liquid to gas Example: The boiling point of sulfuric acid is 327 degrees Celsius

Freezing Point The temperature at which a liquid changes to a solid The freezing point of vinegar is -2 degrees Celsius

Mass Amount of matter in an object; measured with a balance

Weight Measure of the pull of gravity on an object; amount of matter in an object’s volume Ex: Astronauts weigh more on Earth than on the Moon because the Moon has less gravity than Earth.

Volume Amount of space that an object takes up

Density Concentration of matter in an object; amount of matter in an object’s volume In this picture, the solid is denser than the liquid, and the liquid is denser than the gas.

Safety Precaution taken to be free from danger

Precaution Things you do to be careful/safe

Fray Torn, coming apart

Hazard Dangerous thing that could happen or has happened

Wafting A safe way to smell in science lab; put what you are trying to smell about six inches away from nose and gently push air with your other hand toward your nose

Fire triangle Fuel, oxygen, and heat; what is needed to create and sustain fire

Vinegar Mild acid that causes some powders to changes Strong smell Clear liquid Smelled it in our wafting lab Smells like pickles

Solubility Ability to be dissolved Sugar can be dissolved in water

Displaces Takes the place of

Mixture Two or more things put together; two or more different kinds of matter where each keeps its own physical properties

Solution Type of mixture where particles are mixed evenly; cannot be easily separated

Dissolve Mix evenly with water NOT disappeared

Substances Materials

Goggles, Aprons, and Gloves Goggles – safety gear for the eyes Aprons- safety gear for the torso Gloves – safety gear for the hands

Hand Lens magnifying glass to be held in the hand

Triple Beam Balance an instrument used for measuring mass

Graduate Cylinder container with a scale used for measuring liquids

Eyedropper short glass/plastic tube fitted with a rubber bulb and used to measure liquids by drops

Physical Properties characteristics that can be observed or measured

Observations What we see

Measure use a tool to find exact physical characteristics