chemistry

Question 1

Safety glasses

Answer 1

Eye protection to protect eyes from the impact of foreign objects or chemicals.

Question 2

Laboratory

Answer 2

A place where scientific experiments occur.

Question 3

Bunsen burner

Answer 3

A piece of lab equipment used to heat substances

Question 4

Apparatus

Answer 4

A set of equipment needed for a particular purpose

Question 5

Parallax error

Answer 5

Error caused by not having your eye directly in line with the measurement

Question 6

Matter

Answer 6

Anything that has mass and takes up space

Question 7

Compressibility

Answer 7

the measure of how much a given volume of matter decreases when placed under pressure

Question 8

Condensation

Answer 8

The change of state from a gas to a liquid

Question 9

Vaporisation

Answer 9

the changing of a liquid to a gas

Question 10

Melting

Answer 10

The change in state from a solid to a liquid

Question 11

Sublimation

Answer 11

A change directly from the solid to the gaseous state without becoming liquid

Question 12

Deposition

Answer 12

Change from a gas directly to a solid without becoming a liquid

Question 13

Expansion

Answer 13

the act of increasing the size or volume of a substance

Question 14

Contraction

Answer 14

the act of decreasing the size or volume of a substance

Question 15

Kinetic Theory of Matter

Answer 15

states that all of the particles that make up matter are constantly in motion

Question 16

Atom

Answer 16

Basic unit of matter

Question 17

Molecule

Answer 17

A group of atoms bonded together

Question 18

Proton

Answer 18

A subatomic particle that has a positive charge and that is found in the nucleus of an atom

Question 19

Neutron

Answer 19

A subatomic particle that has no charge and that is found in the nucleus of an atom

Question 20

Electron

Answer 20

A subatomic particle that has a negative charge

Question 21

Element

Answer 21

A pure substance made of only one kind of atom

Question 22

Periodic Table

Answer 22

A chart of the elements showing the repeating pattern of their properties

Question 23

Atomic Number

Answer 23

the number of protons and electrons in the nucleus of an atom

Question 24

Mass Number

Answer 24

the total number of protons and neutrons in the nucleus of an atom

Question 25

Nucleus

Answer 25

The centre of an atom that contains the protons and neutrons

Question 26

Compounds

Answer 26

2 or more elements chemically combined

Question 27

Mixtures

Answer 27

A combination of two or more substances that are not chemically combined

Question 28

Homogeneous

Answer 28

A type of mixture that is of uniform concentration throughout

Question 29

Heterogeneous

Answer 29

A type of mixture that is not of uniform concentration throughout.

Question 30

Chemical formula

Answer 30

Symbols that show the elements in a compound and the ratio of atoms