Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Y8 T1 > Science > Flashcards

Science Flashcards

1
Q

Photosynthesis

A

The process that plants and algae turn water and carbon dioxide into glucose and oxygen,using light energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Biomass

A

The material that is made of living cells and tissues

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Chlorophyll

A

The green pigment in leaves that captures energy from light

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Waxy layer

A

The layer that stops the leaf from drying out

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Upper and lower epidermis

A

Protects the cells inside the leaf

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Palisade layer

A

Contains cells that do most of the photosynthesis process

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Spongy layer

A

Has a lot of air spaces that allow rapid diffusion of gases and does a small amount of photosynthesis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Stoma

A

Tiny holes in the lower epidermis that allow carbon dioxide from the aiir to get into the leaf

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Veins

A

Carry water and food to the cells of the leaf

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Root hairs

A

A root cell with a long extension and larger surface area that can absorb water and minerals quickly

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Xylem vessels

A

Long, hollow tubes that carry water and minerals upwards from the root to the leaves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Phloem

A

Carry food, mainly sugars to the parts of the plant either upwards or downwards

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the chemical formula for photosynthesis?

A

6CO² + 6H²O + light energy => C⁶H¹²O⁶ + 6O²

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the word equation for photosynthesis?

A

Carbon dioxide + water + light energy => glucose + oxygen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

How did the ‘ photosynthesis ‘ name came about?

A

Photo = light and synthesis = making so making with light = photosynthesis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

The energy is passed from one organism to another in a _______ ________

A

Food chain

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Name the parts of a leaf

A

Petiole, leaf blade, midrib, margin, veins, tip (apex)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

How is the leaf adapted to photosynthesis?

A

The leaf stalk is attached to the leaf
Veins carry water to the cells
The leaf contains chlorophyll for photosynthesis
They are very thin so that sunlight can get into them

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Name all the parts of the leaf inside

A

Waxy layer, upper and lower epidermis, palisade layer, spongy layer, stoma, veins

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Why is chlorophyll essential for photosynthesis?

A

Because it absorbs light energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

How can we test if a leaf is photosynthesising?

A

By checking if it’s releasing oxygen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What factors affect the rate of photosynthesis?

A

Light intensity, wave length, carbon dioxide concentration, temperature, water supply, chlorophyll concentration, pollution

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

How does light intensity change the rate of photosynthesis?

A

The closer the source of light is the higher the rate of photosynthesis is and the farther it is the loser the rate of photosynthesis is

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

What are the functions of the root?

A

Absorb water and minerals
Anchor the plant firmly in the ground
Some plants store food in the roots
Sometimes the above ground parts get cut off and later grow again because of the roots

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

What are the 2 types of roots?

A

Tap root and fibrous root

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

Why are some plant root swollen?

A

Because they are storing food in the roots

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

How do plants get what they need for photosynthesis?

A

Water from the soil
Carbon dioxide through the stoma
Light energy from the sun

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

Photosynthesis converts _______ energy to ________ energy

A

Light energy to chemical energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

Chlorophyll is in the _______________

A

Chloroplast

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

How do roots absorb minerals?

A

The minerals usually dissolve in the water, so when water is absorbed minerals are also absorbed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

Describe the position of the xylem vessels in roots, stem and leaves

A

They are in a circle shape on the middle of the root
They are on the side of the stem
They are inside the veins in the leaves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

What are the 7 types of nutrients?

A

Protein, carbohydrates, fats, vitamins, minerals, fiber, water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

What nutrients are macronutrients and micronutrients?

A

Macronutrients- protein, carbohydrates and fats
Micronutrients- vitamins and minerals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

Nutrients

A

Substances in food that the body uses for energy and to make cells for the body

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

Protein

A

Use for making new cells and important chemicals for the body
E.g chicken, turkey,eggs,milk, yougurt

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

Carbohydrates

A

They are 2 types: Starch and sugar and they are used to provide energy
E.g. Pasta, bread, brown rice, honey, sweets

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q

Fat

A

Used to provide energy, makes new cell membranes and it can be stored in the body for insulation
E.g. Butter, cheese, avocado, coconut oil, olive oil

38
Q

Vitamins and minerals

A

They don’t o not provide energy
E.g. vitamin A, B, C, D, E, K
Iron, calcium, sodium, potassium, magnesium, zinc

39
Q

Fiber

A

They can’t be digested because they are used to keep the digestion system moving smoothly
E.g. beans, brown rice, apples, oranges, carrots

40
Q

Water

A

It is sometimes considered a nutrient because 60% to 70% of our body is made up of water

41
Q

How can we found out if a specific food has starch?

A

By testing it with iodine solution

42
Q

How can we found out if a specific food has sugar?

A

By testing it with Benedict’s solution

43
Q

What colour does iodine solution turn when the food has or doesn’t have starch?

A

Orange/brown = no starch while blue/black = starch

44
Q

What colour does Benedict’s solution turn when the food has or doesn’t have sugar?

A

Blue = no sugar while brown = sugar

45
Q

What solution is needed to be boiled before testing?

A

Benedict’s solution

46
Q

Balanced diet

A

A diet that provides the right amount of energy and a variety of nutrients

47
Q

A nutritional deficiency disease

A

When a person doesn’t eat enough of a specific nutrient

48
Q

Why should we not eat alot of fat and carbs?

A

Because we would give our body more energy each day than we need which stores in the body as fat which can increase the risk of developing heart disease and diabetes

49
Q

Why should we not eat too much fast food?

A

Because they often contain alot of fat and very few vitamins and minerals

50
Q

Why should we eat plenty of fruits and vegetables?

A

They contain fibre and vitamins

51
Q

How can we get scurvy?

A

By not eating enough vitamin C

52
Q

Digestion

A

The breakdown of large food molecules into smaller ones so that they can be absorbed

53
Q

What is haemoglobin?

A

Something in our body that helps us carry oxygen in the blood

54
Q

What deficiency do we get when we don’t eat enough vitamin D?

A

Rickets

55
Q

Name 3 types of deficiency disease.

A

Scurvy, rickets, anaemia

56
Q

Name 6 types of minerals.

A

Zinc, potassium, calcium, iron, magnesium, sodium

57
Q

Absorption

A

When the digestion food particles get moved from the alimentary canal into the blood/absorbed

58
Q

Alimentary canal

A

The tube that food travels through, starting at the mouth and ending at the anus

59
Q

How does the visking tubing experiment work?

A

We put starch and sugar in the tubing and put it in water the starch is going to stay in because it is large molecules while the sugar will leave it’s small molecules which can leave through the hole in the visking tubing. It can be shown by iodine solution, if we put it in the water it will turn orange/brown because of sugar and it will be blue/black in the visking tubing because of starch.

60
Q

Name all the parts in the digestive system

A

Mouth, salivary glands, oesophagus, liver, gall bladder, pancreas, stomach, small intestine, large intestine, appendix, anus

61
Q

Mouth

A

Chess the food into smaller pieces while the salvia starts the breaking down of starch into sugar

62
Q

Oesophagus

A

Passes the food from the mouth to the stomach without changing

63
Q

Stomach

A

Hydrochloride acid kill micro-organisms in the food while the stomach juices start the digestion of protein

64
Q

Liver

A

Produces bile that is stored and in the gall bladder for the small intestine to help with fat digestion

65
Q

Pancreas

A

Makes pancreatic enzymes for the small intestine to digest protein, carbs and fat

66
Q

Small intestine

A

The pancreatic enzymes and bile is used here to digest protein, carbs and fat and is absorbed by the blood including water, vitamins and minerals

67
Q

Large intestine

A

All the food that couldn’t be digested passes through here (faeces) and water is absorbed here

68
Q

What are the 4 types of teeth?

A

Incisors, canine, premolars and molars

69
Q

Incisors

A

The front teeth with a sharp edge used for bitting off small pieces of food

70
Q

Canine

A

Teeth that are a little more pointed than incisors, that are used to bit of small pieces of food

71
Q

Premolars

A

They have broad surfaces and are used for grinding and crushing food

72
Q

Molars

A

They are a little bigger than premolars and are also used for crushing and grinding food

73
Q

Describe the parts of the tooth

A

Crown, root, enamel, dentine, pulp cavity, fibres, blood supply, gum, jawbone

74
Q

Enamel

A

The covering for the tooth that contains calcium

75
Q

Dentine

A

The layer containing living cells

76
Q

Pulp cavity

A

Contains blood vessels and nerves

77
Q

Fibres

A

Help to hold the tooth in the jawbone

78
Q

How can we care for our tooth

A

By not drinking fizzy drinks or eating sugary food
Clean your teeth after breakfast and before bed
Using a toothpaste containing fluoride

79
Q

Canine means _______

A

Dog tooth

80
Q

Enzymes

A

Biological catalysts that speed up chemical reactions without changing themselves

81
Q

Nam 3 types of enzymes.

A

Amylase (starch to sugar), Protease (protein to amino acids), Lipase (fatty acids to glycerol)

82
Q

Enzymes stop working at what degree?

A

0 degree and over 40 degrees

83
Q

Enzymes work best at what temperature?

A

25-35 degrees

84
Q

Speed

A

How fast something is moving

85
Q

Distance

A

How far 2 things are

86
Q

Time

A

How long something is or how long something takes

87
Q

Light gates

A

2 detector strips that are used in a laboratory to calculate speed as they can measure less than a second intervals

88
Q

What is the formula for speed?

A

Speed = Distance / time

89
Q

What is the formula for distance?

A

Distance = speed x time

90
Q

What is the formula for time?

A

Time = distance / speed

91
Q

What does it mean when the space intervals increase?

A

It’s speeding up

92
Q

What does it mean when the space intervals decrease?

A

It’s slowing down

Y8 T1 (5 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions