Brainscape's Knowledge GenomeTM

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


See full index

Science Year 08 > Science Y08 Aut1 > Flashcards

Science Y08 Aut1 Flashcards

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

List the 7 parts of a balanced diet.

A

carbohydrate, protein, fat (lipid), vitamins, minerals, fibre, water

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

Why do we need each of these nutrient groups?

A

carbohydrates for energy, protein for growth and repair, fats as an energy store, vitamins and minerals for vital cell processes, fibre keeps digestive system moving and healthy, water for cell function

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

What do we use to test for starch?

A

iodine- changes orange to black

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

Write the sequence of organs in the digestive system from mouth to anus.

A

mouth, oesophagus, stomach, small intestine, large intestine, rectum, anus.

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

What is the purpose of digestion?

A

The purpose of digestion is to break down large food particles into small ones so they can be absorbed into the blood and carried around the body.

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

What does the stomach contain and why?

A

The stomach contains acid (HCl) which destroys harmful bacteria and makes the pH right for digestion of protein.

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

What happens in the small intestine?

A

In the small intestine, small food particles are transferred from the digestive system into the blood.

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

What is an enzyme?

A

An enzyme is biological catalyst.

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

What do enzymes do?

A

A catalyst is something which speeds up chemical reactions, so an enzyme is something which speeds up chemical reactions in living things.

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

Why do we need enzymes?

A

We need enzymes to speed up the breakdown of large food particles into small food particles.

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

Where are enzymes produced?

A

salivary gland, stomach, pancreas, small intestine

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

What are pathogens?

A

disease causing micro-organisms

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

Name three types of pathogen.

A

bacteria, viruses and fungi

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

Define a non-communicable disease.

A

A non-communicable disease is one that is not caused by a pathogen and cannot be spread.

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

What happens in the respiratory system of a person suffering from asthma?

A

If you have asthma, your bronchioles can become inflamed, swollen and constricted (narrowed), and excess mucus is produced.

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

List 3 lifestyle factors that can be bad for health.

A

smoking, drinking alcohol, having an unbalanced diet

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

Classify the following drugs as stimulants or depressants: alcohol, caffeine, heroine, cannabis, cocaine, MDMA.

A

stimulants: caffeine, cocaine, MDMA. Depressants: heroine, cannabis, alcohol

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

Define obesity.

A

Obesity is being very overweight.

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

Describe what happens when the energy you take in as food and drink is more than the energy you use.

A

If your energy intake is more than your energy use, then you will gain weight.

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

What is malnutrition?

A

Malnutrition is not having enough, or having too much, of one or more of nutrients.

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

What is the name for a solid turning into a liquid and a liquid turning into a solid?

A

melting and freezing

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

What is the name for a liquid turning into a gas and a gas turning into a liquid?

A

boiling and condensing

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

What is the name for a solid turning into a gas?

A

sublimation

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

How does heating affect the energy of particles?

A

the energy of the particles increases

25
Q

What happens if particles in a solid have enough energy to overcome the forces holding them together?

A

the particles begin to flow and the solid melts

26
Q

Define “boiling point”

A

the temperature at which a liquid turns into a gas

27
Q

Define “diffusion”

A

the movement of particles from a high concentration to a low concentration

28
Q

Define pressure

A

the force pushing on a particular area

29
Q

What is the formula to calculate pressure?

A

pressure = force ¸ area

30
Q

What is the formula to calculate density?

A

density = mass ¸ volume

31
Q

What is a scientific theory?

A

an idea used to explain events

32
Q

How are theories proved or disproved?

A

by collecting evidence

33
Q

Define a formulation

A

a mixture designed as a useful product

34
Q

Give 2 examples of formulations

A

formula milk and paint

35
Q

Define “composite”

A

a material made from two or more different types of material

36
Q

Give two examples of composites

A

MDF and fibreglass

37
Q

What is a polymer?

A

a very large molecule made from smaller molecules called monomers which are joined together

38
Q

Give examples of polymers

A

polyester, polyethene and polystyrene

39
Q

Other than separating mixtures give another use of chromatography

A

identifying unknowns

40
Q

What property of the spots do we compare to identify unknowns

A

distance travelled compared to the distance travelled by a known substance

41
Q

What is a contact force?

A

one that acts through direct contact between objects

42
Q

What are examples of contact forces?

A

friction, air resistance, tension, normal contact force, upthrust

43
Q

What is a resultant force?

A

a single force that could replace all forces acting on an object

44
Q

What happens when there is NO resultant force on an object?

A

It will remain at rest or move with constant speed in straight line.

45
Q

What happens when there IS a resultant force on an object?

A

It will accelerate or decelerate.

46
Q

How can air resistance and friction be reduced?

A

streamlining (air resistance) and lubrication (friction)

47
Q

What is pressure?

A

a measure of the force exerted on an area

48
Q

What equation links pressure, force and area?

A

pressure = force divided by area ( P=F/A ). The units of pressure are N/m2, also Pascals).

49
Q

What is atmospheric pressure?

A

The pressure caused by the weight of air above a surface.

50
Q

How does pressure vary with the depth of a fluid?

A

It increases with depth.

51
Q

In what direction does pressure in a fluid act?

A

in all directions

52
Q

What is the upwards force on an object in a fluid?

A

upthrust

53
Q

What type of energy is stored due to interaction of magnetic fields?

A

magnetic energy

54
Q

How do magnetic poles interact?

A

like poles repel - unlike poles attract

55
Q

What direction are the arrows on magnetic field lines?

A

north to south (the direction a north pole would move)

56
Q

What are the four magnetic materials?

A

iron, steel, cobalt, nickel

57
Q

What is a permanent magnet?

A

material that has a permanent magnetic field

58
Q

What is an induced magnet?

A

material that has a temporary magnetic field

59
Q

How does a compass work?

A

the north end of the compass needle points to geographic north (a magnetic south pole)

Science Year 08 (5 decks)

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