Y9 PC1 Revision

Question 1

What is an element?

Answer 1

A pure substance which is made from only one type of atom. Elements are listed on the periodic table.

Question 2

What is a compound?

Answer 2

A pure substance made from two or more elements which are chemically bonded.

Question 3

What is a mixture?

Answer 3

Two ore more types of atoms or compounds not chemically bonded.

Question 4

What is reflection?

Answer 4

When light bounces off a surface back to the medium it came from.

Question 5

What is refraction?

Answer 5

When the speed of light changes as it moves from one medium to another causing a change in direction.

Question 6

What does a balanced diet include?

Answer 6

Carbohydrates,
Lipids and Fats,
Proteins,
Vitamins,
Minerals,
Fibre,
Water.

Question 7

Name all of the organs that food passes through.

Answer 7

Mouth,
Oesophagus,
Stomach,
Small Intestine,
Large Intestine,
Rectum,
Anus.

Question 8

What is malnutrition?

Answer 8

Lacking in a specific nutrient.

Question 9

What is the ph level of an acid

Answer 9

1-6 Red, Orange, Yellow

Question 10

What is the ph level of an alkali

Answer 10

8-14 Blue, Purple

Question 11

What is the ph level of a neutral

Answer 11

7 Green

Question 12

What is an indicator?

Answer 12

A substance that will change colour at a specific ph value.

Question 13

Name all of the planets.

Answer 13

Mercury,
Venus,
Earth,
Mars,
Jupiter,
Saturn,
Uranus,
Neptune.

Question 14

What is mass?

Answer 14

The amount of matter in an object.

Question 15

What is weight?

Answer 15

The force of gravity acting on a mass.

Question 16

Is gravity a contact or non-contact force?

Answer 16

Gravity is a non contact force.

Question 17

What is the difference between aerobic and anaerobic respiration?

Answer 17

Anaerobic respiration is the process of releasing energy from food into the body without using oxygen, aerobic occurs with oxygen.

Question 18

What is the equation for photosynthesis?

Answer 18

Carbon Dioxide + Water a Glucose + Oxygen

Question 19

What is physical weathering?

Answer 19

A process that causes the disintegration of rocks, minerals and soils without chemical change.

Question 20

What is chemical weathering?

Answer 20

The interaction of rock with mineral solution’s to change the composition of rocks.

Question 21

What are the 3 types of rocks?

Answer 21

Igneous,
Sedimentary,
Metamorphic.

Question 22

How are igneous rocks formed?

Answer 22

They are formed from the cooling of magma or lava.

Question 23

How are sedimentary rocks formed?

Answer 23

They are formed when layers of sediments are compacted and cemented over time.

Question 24

How are metamorphic rocks formed?

Answer 24

They are formed when igneous or sedimentary rock is changed due to extreme heat or pressure over a long period of time.

Question 25

What is current?

Answer 25

The rate of flow of charge.

Question 26

What is voltage?

Answer 26

The amount of energy transferred to the charges.

Question 27

What is resistance?

Answer 27

Opposing the flow of an electric charge.

Question 28

What is a parallel circuit?

Answer 28

A closed circuit in which the current divides into two or more paths before recombining to complete the action.

Question 29

What is a series circuit?

Answer 29

A type of circuit where the current passes through each component in turn.

Question 30

What is a Eukaryotic Cell?

Answer 30

Any cell or organism that possesses a clearly defined nucleus.

Question 31

What are the different parts of a plant cell?

Answer 31

Cell Wall, Nucleus, Chloroplast, Cell Membrane, Mitochondria, Vacuole, Cytoplasm.

Question 32

What are the different parts of an animal cell?

Answer 32

Cytoplasm, Mitochondria, Cell Membrane, Ribosome, Nucleus.

Question 33

What is an organelle?

Answer 33

A subcellular structure that has one or more specific jobs to perform.

Question 34

What is a specialised cell?

Answer 34

They have a structure that allows them to complete a specific funtion.

Question 35

What is diffusion?

Answer 35

Diffusion is the movement of particles from a higher concentration to a lower concentration in a liquid or gas.

Question 36

What are the three states of matter?

Answer 36

Solid, Liquid, Gas.

Question 37

What happens when particles are heated?

Answer 37

They gain energy

Question 38

What are enzymes?

Answer 38

Biological catalysts that breakdown food that is insoluble.