Science year 8

Question 1

What is the definition of absorb

Answer 1

Diffusion of particles into the body

Question 2

What is the definition of amylase

Answer 2

Enzyme found in saliva that breaks down carbohydrate

Question 3

What are amino acids

Answer 3

Product of digestion of protein

Question 4

What is bile

Answer 4

Alkaline brownish yellow fluid that is secreted by the liver, stored in the gald bladder. It is used to emulsify fats

Question 5

carbohydrase

Answer 5

Enzyme that breaks down carbohydrate into glucose

Question 6

Carbohydrates

Answer 6

Nutrients needed in a balanced diet e.g bread

Question 7

Denature

Answer 7

Process where the shape of the enzyme is changed and no longer works

Question 8

What is digestion

Answer 8

The process where food is converted into smaller substances that can be absorbed by the body

Question 9

Emulsify

Answer 9

Break a large droplet into loads of smaller ones (usually fats and oils)

Question 10

Enzyme

Answer 10

Substance in the body that chemically breaks up food into smaller substances. Each type of nutrient needs a specific enzyme

Question 11

Fatty acids

Answer 11

Product of digestion of lipids

Question 12

Fibre

Answer 12

Nutrient needed in a balanced diet

Question 13

Glucose

Answer 13

Sugar

Question 14

Glycerol

Answer 14

Product of digestion of lipids

Question 15

Gut

Answer 15

The entire length of tubing between the mouth and the anus

Question 16

Hydrochloric acid

Answer 16

Acid found in the stomach to kill bacteria

Question 17

Large intestine

Answer 17

Part of the digestive system that absorbs water

Question 18

Lipase

Answer 18

Enzyme that breaks down fat

Question 19

Iodine test

Answer 19

Test for starch

Question 20

Lipids

Answer 20

Fats

Question 21

Liver

Answer 21

Part of the digestive system that removes toxins and produces bile

Question 22

microvilli

Answer 22

Tiny spikes in the vili to provide a larger surface area for absorbing nutrients

Question 23

Oesophagus

Answer 23

Tube from mouth to stomach

Question 24

Pancreas

Answer 24

Part of the digestive system that produces most enzymes

Question 25

Peristalsis

Answer 25

A wavelike contraction of muscle to help move food down the oesophagus

Question 26

Protease

Answer 26

An enzyme that breaks down protein

Question 27

Proteins

Answer 27

Nutrient needed in a balanced diet E.G meat

Question 28

Saliva

Answer 28

Fluid produced by mouth. Contains amylase to start chemical digestion

Question 29

Small intestine

Answer 29

Part of the digestive system that absorbs broken down nutrients

Question 30

Starch

Answer 30

Type of carbohydrate

Question 31

Stomach

Answer 31

Part of the digestive system that churns up food

Question 32

Villi

Answer 32

Tiny spikes on the small intestine to provide a larger surface area for absorbing nutrients

Question 33

Name some foods with Carbohydrates

Answer 33

Bread, beans, milk, popcorn, potatoes, cookies, spaghetti, soft drinks, corn and cherry pie

Question 34

Fatty foods

Answer 34

Meat products, butter, cheese, cream and biscuits

Question 35

What do we need in a balanced diet

Answer 35

Fruits, vegetables, pulses, beans, dairy products, rice and chappati

Question 36

Where is villi found

Answer 36

Inside the small intestine

Question 37

Describe the villi

Answer 37

They have very thin walls so that nutrients so that nutrients from digestive food can diffuse

Question 38

Absorb

Answer 38

Taken into a material

Question 39

Angle of incidence

Answer 39

The angle between the incident ray and the normal line

Question 40

Angle of reflection

Answer 40

The angle between the reflected ray and the normal line

Question 41

Brain

Answer 41

The organ in the human body that processes signals from receptors

Question 42

Cornea

Answer 42

The transparent layer at the front of the eye

Question 43

Dispersion

Answer 43

The splitting up a ray of light of mixed wavelength by refraction into its components

Question 44

Emit

Answer 44

To give out

Question 45

Eye

Answer 45

Organ of sight, which focuses and detects

Question 46

Filter

Answer 46

A piece of material that allows some radiation (color) through but absorbs the rest

Question 47

Frequency

Answer 47

The number of complete waves or vibration complete waves or vibrations produced in one second

Question 48

Lens

Answer 48

A device made from shaped glass that focuses light rays from objects to form an image

Question 49

Photoreceptors

Answer 49

Specialized cells that are sensitive to light

Question 50

Luminous

Answer 50

Gives out light

Question 51

Non luminous

Answer 51

Objects that no longer give light

Question 52

Optic nerve

Answer 52

A paired sensory nerve that runs from each eye to the brain

Question 53

Normal

Answer 53

An imaginary line at right angles to a surface where a light ray strikes it.

Question 54

Plane

Answer 54

A mirror with a flat reflective surface

Question 55

Primary colors

Answer 55

Red, blue and green

Question 56

Prism

Answer 56

A triangular shaped piece of glass

Question 57

Pupil

Answer 57

The whole in the front of your eye where the light goes in

Question 58

Reflect

Answer 58

Bounce off

Question 59

Reflected ray

Answer 59

The ray that is reflected from the surface

Question 60

Refraction

Answer 60

The change in direction of a ray or wave as a result in its change of speed

Question 61

Retina

Answer 61

The layer of light sensitive cells at the back of the eye

Question 62

Secondary color

Answer 62

Colors that can be made by mixing the primary colors

Question 63

Spectrum

Answer 63

A band of colors produced when light is spread out by a prism

Question 64

Translucent

Answer 64

Objects that transmit light but diffusing the light as it passes through

Question 65

Transmit

Answer 65

When light or other radiation passes through an object

Question 66

Transparent

Answer 66

Objects that transmit light and you can see through them

Question 67

Vacuum

Answer 67

A space where there is no matter