Y8 Synoptic Revision

Question 1

Name 5 Food Groups

Answer 1

Carbohydrates, Fats, Proteins, Minerals, Vitamins

Question 2

Which organ system breaks down food and absorbs it into the blood?

Answer 2

Digestive System

Question 3

Name 3 organs in the digestive that food passes through

Answer 3

Mouth, Oesophagus, Stomach, Small Intestine, Large intestine

Question 4

Name 2 organs that are part of the digestive system that food does not pass through

Answer 4

Pancreas, Liver, Gall Bladder

Question 5

Describe what role enzymes play in digestion

Answer 5

They break down large molecules such as starch into smaller molecules so that they can be absorbed into the bloodstream.

Question 6

Why is protein important in a healthy diet?

Answer 6

Proteins are used for growth and repair

Question 7

Arteries carry blood __________ from the heart

Answer 7

Away

Question 8

Veins carry blood __________ the heart

Answer 8

Towards

Question 9

The body system that delivers oxygen and glucose to your cells is called the …………………………. system

Answer 9

Circulatory

Question 10

What is the word equation for aerobic respiration?

Answer 10

Glucose+Oxygen —> Carbon dioxide+ Water + ‘Energy’

Question 11

What substance, produced during anaerobic respiration can cause cramp?

Answer 11

Lactic acid

Question 12

Put these organs into the order in which air passes through them during breathing in: Alveoli, Nose, Bronchi, Trachea, Bronchioles

Answer 12

Nose, Trachea, Bronchi, Bronchioles, Alveoli

Question 13

Name 3 harmful substances in cigarette smoke.

Answer 13

Tar, Nicotine, Carbon monoxide

Question 14

The male sex cell (gamete) is called ……………

Answer 14

Sperm

Question 15

The female sex cell (gamete) is called ………………

Answer 15

Egg or Ovum

Question 16

When the nucleus of a sperm cell joins with the nucleus of an egg cell this is called……………………

Answer 16

Fertilisation

Question 17

After fertilisation the fertilized egg divides to become a ball of cells called the ………………………….

Answer 17

Embryo

Question 18

The organ that attaches the foetus to the uterus lining is called ………………………..

Answer 18

The placenta

Question 19

An average human pregnancy lasts………..

Answer 19

9 months

Question 20

The 3 states of matter are…….

Answer 20

Solids, Liquids & Gases

Question 21

What is the name given to the way that heat travels through solids (especially metals)?

Answer 21

Conduction

Question 22

Which method of heat transfer involves a hot liquid or gas becoming less dense and rising?

Answer 22

Convection

Question 23

Materials which do not allow heat energy to travel through them easily are called …………………………..

Answer 23

Thermal insulators

Question 24

What is an element?

Answer 24

An element is a substance that only contains one type of atom.

Question 25

What is the difference between a mixture and a compound?

Answer 25

In a compound the different types of atom are chemically joined, whereas in a mixture they are not.

Question 26

Air is an example of a

Answer 26

Mixture

Question 27

Sodium Chloride is an example of a

Answer 27

Compound

Question 28

The _________________ lists all the elements in order of atomic number

Answer 28

Periodic Table

Question 29

Sand and water are best separated by which method?

Answer 29

Filtering

Question 30

Salt can be obtained from sea water by which method?

Answer 30

Evaporation

Question 31

Pure water can be obtained from sea water by which process?

Answer 31

Distillation

Question 32

Coloured dyes can best be separated using which process?

Answer 32

Chromatography

Question 33

An acid has a pH that is

Answer 33

Lower than 7

Question 34

An alkali has a pH that is

Answer 34

Higher than 7

Question 35

An object that produces light is called ..............

Answer 35

Luminous

Question 36

An object that does not allow light to pass through it is called ............

Answer 36

Opaque

Question 37

An object which allows light through so that a clear image can be seen is called .............

Answer 37

Transparent

Question 38

An object which allows some light through it such as tissue paper is called ..........

Answer 38

Translucent

Question 39

Angle of incidence =

Answer 39

Angle of reflection

Question 40

When light bends when it enters a denser material this is called ..........

Answer 40

Refraction

Question 41

White light ...........

Answer 41

Is a mixture of colours

Question 42

The order of the colours in the spectrum is .......

Answer 42

Red, Orange, Yellow, Green, Blue, Indigo, Violet

Question 43

A red object appears red because it ......

Answer 43

Reflects red light but absorbs all the other colours

Question 44

The three primary colours for light are .......

Answer 44

Red, Green and Blue

Question 45

A green filter only lets ................. light to pass through

Answer 45

Green

Question 46

A red shirt will appear what colour in green light?

Answer 46

Black

Question 47

Which travels faster, light or sound?

Answer 47

Light travels about a million times faster than sound

Question 48

The part of the eye that detects light and sends an electrical signal to the brain is the .........

Answer 48

Retina

Question 49

What is the closest value to the speed of sound in air? 30m/s, 300m/s, or 3,000m/s

Answer 49

300m/s

Question 50

The range of human hearing is from about 20Hz to about what higher frequency? 200Hz, 2,000Hz, or 20,000Hz

Answer 50

20,000Hz

Question 51

What are very high frequency sounds that humans cannot hear called?

Answer 51

Ultrasound

Question 52

A device that turns sound energy into electrical energy is called a ..............

Answer 52

Microphone

Question 53

An object which turns electrical energy into sound is called a ..............

Answer 53

Speaker

Question 54

The part of the ear that first converts sound into vibrations is the ............

Answer 54

Ear drum

Question 55

Which part of the ear turns vibrations into an electrical signal?

Answer 55

Cochlea

Question 56

A high pitched sound as a .................. Wavelength

Answer 56

Short

Question 57

A low pitched sound has a ................ frequency

Answer 57

Low

Question 58

In an experiment results are usually repeated to increase .........

Answer 58

Reliability