SCIENCE 1.1-1.4 VOCAB

Question 0

Property

Answer 0

a characteristic that belongs to a person or thing

Question 1

Matter

Answer 1

anything that has mass and takes up space.

Question 2

Substance

Answer 2

A single kind of matter that is pure and has a specific set of properties.

Question 3

Physical property

Answer 3

a characteristic of a pure substance that can be observed without changing it.

Question 4

Chemical Property

Answer 4

A characteristic of a substance that decreases its ability to change into different substances.

Question 5

Element

Answer 5

a pure substance that cannot be broken down into other substances by chemical or physical means

Question 6

Atom

Answer 6

the basic particle from which elements are made. The smallest particle of an element

Question 7

Chemical bond

Answer 7

the force of attraction that holds two atoms together

Question 8

Molecule

Answer 8

A neutral group of two or more atoms held together by covalent bonds.

Question 9

Compound

Answer 9

A substance made of two or more elements chemically combined in a set ratio.

Question 10

Mixture

Answer 10

two or more substances that are together in the same place but their atom are not chemically bonded.

Question 11

Heterogeneous mixtures

Answer 11

the parts of the mixtures are noticeably different from one another

Question 12

Homogeneous mixture

Answer 12

the substances are so evenly distributed that it is difficult to distinguish one substance in the mixture from one another

Question 13

Suspension

Answer 13

a heterogeneous mixture that separates into layers over time

Question 14

Solution

Answer 14

When substances dissolve and form a homogeneous mixture

Question 15

Colloid

Answer 15

Contains medium sized particles that are intermediate in size between the small particles in a solution and the large particles in a suspension

Question 16

Solvent

Answer 16

the dissolving medium

Question 17

Solute

Answer 17

the “stuff” getting dissolved

Question 18

Tyndall effect

Answer 18

dispersed colloid particles scatter light allowing us to differentiate between colloids and solutions

Question 19

Liquids can be separated from each other by heating them up to the temperature at which one of the liquids boil.

Answer 19

Distillation

Question 20

Evaporation

Answer 20

When left open in the air, liquid solutions can change to gas leaving solids behind.

Question 21

Filtration

Answer 21

Solids can be separated from liquids by pouring the mixture through a filter.

Question 22

Magnetic attraction

Answer 22

Iron objects can be separated from a mixture using a magnet

Question 23

Weight

Answer 23

a measure of force of gravity acting on object.

Question 24

Mass

Answer 24

amount of matter in an object

Question 25

International system of units

Answer 25

A system of units used by scientists to measure the properties of matter

Question 26

Volume

Answer 26

the amount of space matter occupies.

Question 27

Density

Answer 27

The measurement of how much mass of a substance is contained in a given volume.

Question 28

Physical change

Answer 28

a change that alters the form or appearance of a material but doesn’t the material into another substance.

Question 29

Chemical change

Answer 29

A change in which one or more substances combine or break apart to form new substance.

Question 30

Law of conservation of mass

Answer 30

The principle that the total amount of matter is neither created nor destroyed during any physical or chemical change

Question 31

temperature

Answer 31

How hot or cold something is

Question 32

endothermic change

Answer 32

a change in which energy is absorbed

Question 33

exothermic change

Answer 33

a change in which energy is released

Question 34

Chemical energy

Answer 34

A form of potential energy that is stored in chemical bonds between atoms.

Question 35

energy

Answer 35

the ability to do work or cause change.

Question 36

the total energy of the motion of all the particles in an object

Answer 36

Thermal energy