Science- 6th Grade

Question 1

Atom

Answer 1

Basic unit of matter

Question 2

Different atoms are called

Answer 2

Chemical elements

Question 3

Atoms are made up of three kinds of smaller particles called;

Answer 3

• protons
• neutrons
• electrons

Question 4

Atoms join together to make;

Answer 4

Molecules

Question 5

Protons

Answer 5

Are positively charged (+)

Question 6

Neutrons

Answer 6

Have no charge

Question 7

Electrons

Answer 7

Negatively charged (-)

Question 8

Protons and neutrons

Answer 8

Found in the nucleus

Question 9

1kg

Answer 9

1000g

Question 10

Conduction

Answer 10

Transfer of heat by direct contact

Question 11

Convection

Answer 11

Transfer of heat by movement of fluids

Question 12

Radiaton

Answer 12

Transfer of heat by waves through the air

Question 13

The three states of matter

Answer 13

• solid
• gas
• liquid

Question 14

Solid to liquid

Answer 14

Melting

Question 15

Liquid to gas

Answer 15

Evaporation

Question 16

Liquid to solid

Answer 16

Freezing

Question 17

Gas to liquid

Answer 17

Condensation

Question 18

Solution

Answer 18

A mixture in which the particles of different kinds of matter are mixed evenly with each other

Question 19

Liquid

Answer 19

Matter that takes up the shape of its container and takes up a definite amount of space

Question 20

Chemical Reaction

Answer 20

Another term for chemical change

Question 21

Solubility

Answer 21

A measure of the amount of a material that will dissolve in another material

Question 22

Mass

Answer 22

The amount of matter in an object

Question 23

Gas

Answer 23

Matter that has no definite shape and takes up no definite amount of space

Question 24

Density

Answer 24

The property of matter that compares the amount of matter to the space taken up.

Density=Mass/Volume ( D=M/V)

Question 25

Solid

Answer 25

Matter that has a definite shape and takes up a definite amount of space

Question 26

Dissolves

Answer 26

When one material forms a solution with another material

Question 27

Chemical change/chemical reaction

Answer 27

A change that produces one or more new substances and may release energy. Example;
2H+ O=H2O

The chemical substances on the left are called reactants,while the chemical substances on the right are called products.

Question 28

Matter

Answer 28

Matter is anything that has mass and takes up space and has volume. Objects are matter.Matter is made up of molecules.

Question 29

Pure substance

Answer 29

A pure substance has the same composition throughout. Two examples of pure substances are elements and compounds.

Examples of pure substances; table salt, sugar

Question 30

Elements

Answer 30

Cannot be broken down

Question 31

Compounds

Answer 31

Formed from the chemical combination of two or more elements.

Question 32

Mixture

Answer 32

Formed when two or more substances ( solids,liquids, or gases) are physically combined.

-The parts of a mixture can be separated from one another.

Ex. Mixed nuts, salad

Question 33

How do you find the volume of a given cube?

Answer 33

Volume=length x width x height

Question 34

What are molecules made up of?

Answer 34

Molecules are made up of atoms

Question 35

Ecosystem

Answer 35

a place where living and nonliving things interact