Brainscape's Knowledge GenomeTM

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


See full index

Science Yr 8 > End Of Year Exams Yr 8 > Flashcards

End Of Year Exams Yr 8 Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

Ecosystem

A

The interaction between plants, animals and their habitat in a particular location

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

Community

A

The collection of the different types of organisms present in an ecosystem

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

Habitat

A

The area of land where organisms live and it has all the resources that an organism needs to live

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

Niche

A

A particular place or role that an organisms has in an ecosystem

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

What is protein needed for

A

Growth and repair

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

What is needed for warmth and insulation and energy

A

Lipids

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

What is carbohydrates

A

They are needed for energy

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

Vitamins are needed for ….

A

Preventing deficiency diseases

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

What are minerals used for

A

Key chemicals in your body

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

What happens if you lack vitamin D ?

A

Rickets

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

What happens if you lack vitamin C

A

Scurvy

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

What happens if you lack calcium

A

Bone and tooth decay

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

What is bile?

A

Bile is made in the liver and stored in the gall bladder it helps to break down stomach acid and emulsify lipids

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

Why does the small intestine have a large surface area?

A

This is because of the villi, they provide a large surface area for maximum absorption of nutrients into the blood stream

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

What does smoking do to you

A

It damages your lungs with tar and weakens the alveoli which leads to ling cancer

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

What can smoking do to your heart?

A

It can block arteries which can cause death

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

What does carbon monoxide do in a cigarette

A

It stops the blood from carrying oxygen, instead it clings to them

18
Q

What does a depressant do

A

It slows down your reaction time and relaxes you, an example is alcohol

19
Q

What does a stimulant do

A

It helps your reaction time and keeps you awake, an example it coffee or cocaine

20
Q

What do hallucinogens do

A

They make you hear, see and think things that aren’t really there, an example is marijuana or LSD

21
Q

What do pain killers do

A

They help stop or relieve pain from someone, an example is heroine and aspirin

22
Q

What do enzymes do

A

Enzymes are special molecules that break down large molecules of nutrients into smaller ones so they can be digested more easily

23
Q

Explain the journey that food takes from the mouth to the anus

A

Mouth, oesophagus, stomach, small intestine, large intestine, rectum, anus

24
Q

What is the rectum

A

The last place where the faeces is stored

25
Q

What happens in the large intestine

A

Only the food that cannot be digested is here, all the water is removed and goes back into the body leaving a solid lump of food called faeces

26
Q

What happens in the stomach

A

The food mixes with digestive juices and hydrochloric acid

27
Q

What happens in the oesophagus

A

Food is pushed through the gullet by contracting muscles

28
Q

What is protease

A

Protease is an enzyme that breaks down protein into amino acids, this happens in the stomach and small intestine

29
Q

What is carbohydrase

A

It is the enzyme that breaks down carbohydrates into sugar molecules called glucose, this happens in the mouth, stomach and small intestine

30
Q

What is lipase

A

Lipase breaks down lipids ( fat ) into fatty acids and glycerol, this happens in the small intestine and is helped by bile

31
Q

What is the reactivity series

A 
Polite- potassium 
Spotted- sodium
Leopards- lithium
Can- calcium
Meet- magnesium
Affectionate- aluminium 
Zebras- zinc
Into- iron
Tender- tin
Loving- lead
Care- copper
Single- silver
Girls- gold
Please- platinum
32
Q

What classes a metal as a metal?

A

Is it a good conductor of heat and electricity, shiny, solid at room temperature (expect mercury), density, strong but maleable, can they be magnetic, they ring when hit

33
Q

Whats the definition of an element?

A

Ask mrs

34
Q

Why do plants need nitrates?

A

Nitrates help growth and repair and without then plants have poor growth, weak stem and upper leafs pail

35
Q

Why is phosphates needed in plants?

A

Respiration and making roots as well as stoping the plant turning purple

36
Q

How does potassium effect plants?

A

Needed for respiration and photosynthesis and leaves with yellow spots

37
Q

Magnesium deficiency

A

Help make chlorofiel without yellow leafs

38
Q

What does co - exist mean

A

Animals that live together

39
Q

What do the guard cells do

A

Open and close the stomata

40
Q

What do the cells in the palisade layer do

A

They are the main site of photosynthesis

41
Q

What does the waxy layer do

A

It reduces the amount of water evaporated

42
Q

What does the stomata do

A

Open to absorb sunlight but close if water levels are low

Science Yr 8 (3 decks)

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