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Science > Christmas Test Prep 2024 > Flashcards

Christmas Test Prep 2024 Flashcards

1
Q

Whats the function of the cell membrane?

A

Controls what exits and enters the cell

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2
Q

Whats the function of the nucleus?

A

Carrie genes that control cell activities

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3
Q

What is the function of cytoplasm?

A

Watery fluid where parts of the cell float and chemical reactions take place

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4
Q

What is the definition of a hypothesis

A

An educated guess

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5
Q

What’s an independent variable?

A

A factor you change in an experiment to see what happens

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6
Q

What’s a dependent variable?

A

A factor you measure in response to the change you made

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7
Q

If one variable affects the other, then do they have?

A

A relationship.

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8
Q

What’s the control of an experiment?

A

The group where a variable isn’t being tested.

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9
Q

What’s a fair test?

A

An experiment that only changes one variable at a time.

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10
Q

How many times should you repeat and experiment for reliable results?

A

You should repeat it three times.

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11
Q

What are ethical considerations in an experiment?

A

Moral choices

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12
Q

What is quantitative data?

A

A quantity that can be measured eg. Distance

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13
Q

What is qualitative data?

A

A record of the qualities of something, eg. Flavour

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14
Q

What is SALT for a graph?

A

S- scale…is the scale suitable?
A- axis…are the intervals equal?
L- label…are the axes labeled, is there a unit of measurement?
T-title…what is the graph’s purpouse?

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15
Q

Which axis on a graph does the dependent variable go on?

A

The Y axis (vertical)

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16
Q

Which axis on a graph does the independent variable go on?

A

The X axis (horizontal)

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17
Q

What’s a zero error?

A

When a measuring instrument doesn’t start at zero.

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18
Q

What’s a parallax error?

A

When a scale is read from the wrong angle.

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19
Q

What measurement instrument would you use to measure a small curved line?

A

An opisometer

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20
Q

What measurement instrument would you use to measure something like the diameter of a ring?

A

Vernier Callipers

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21
Q

What is temperature?

A

The measurement of how hot or cold an object is.

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22
Q

What is mass?

A

Mass is the amount of matter in an object?

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23
Q

What is volume?

A

The measurement of how much space an object takes up

24
Q

If your reading volume from a graduated cylinder, what do you need to do?

A

You need to become eye level with the meniscus and read it from there.

25
Q

What is the formula to calculate the volume of a cuboid?

A

The length x width x height

26
Q

How do you calculate density?

A

The mass divided by the volume

27
Q

How do you calculate volume?

A

The mass divided by the density.

28
Q

How do you calculate mass?

A

Density times volume

29
Q

Will an object sink in a liquid it is denser than?

A

Yes, it will sink.

30
Q

What are the seven characteristics of a living thing?

A
  1. Movement
    2.respiration
    3.sensitivity

4.nutrition
5.Excretion
6.reproduction
7. Growth

31
Q

What is respiration?

A

Release of energy from food

32
Q

What is excretion?

A

Release of waste

33
Q

What is a group of cells called?

A

A tissue

34
Q

What is a group of tissue called?

A

An organ

35
Q

Whats a group of organs called?

A
36
Q

What’s a group of systems called?

A

An organism

37
Q

What’s an organism?

A

A living thing

38
Q

What is the function of cytoplasm?

A

A watery fluid in which the parts of the cell float, also where chemical reactions take place.

39
Q

That’s the function of mitochondria?

A

Releases energy from respiration

40
Q

What’s the function of ribosome?

A

Makes proteins eg.hormones

41
Q

What’s the function of chloroplast?

A

Contains a green pigment called chlorophyll this is where photosynthesis occurs.

42
Q

What’s the function of the cell wall?

A

Provides protection, shape and structure.

43
Q

What’s the large vacuole used for?

A

Storing food and water

44
Q

Do plant cells contain the same ribosomes as animal cells?

A

Yes

45
Q

What are the parts of the animal cell?

A
  1. Cytoplasm
    2.nucleus
    3.cell membrane
    4.ribosomes
    5.mitochondria
46
Q

What are the parts of a plant cell?

A
  1. Nucleus
  2. Cytoplasm
    3.cell membrane
    4.mitochondria
    5.ribosomes
    6.chloroplasts
    7.large vacuole
    8.cell wall
47
Q

What are the steps of creating a slide?

A
  1. Clean the slide
  2. Out a drop of iodine on top
    3.peel a piece of onion, and put it flat on the slide
    4.place the coverslip on top at 45 degree angle for no bubbles
48
Q

What would you stain a cheek cell with?

A

Methylene Blue

49
Q

What are the three types of matter?

A
  1. Gas
  2. Liquid
  3. Solid
50
Q

Does air have a mass?

A

Yeeeeeesssssssss

51
Q

What’s an atom?

A

The smallest part of a chemical element

52
Q

What’s an element?

A

A substance that contains only one type of atom

53
Q

What’s a molecule?

A

A group of atoms joined together

54
Q

When writing an element which of the letters is capitalised?

A

The first

55
Q

What is a chemical change?

A

When atoms change in a different way to give us a new substance called a compound

56
Q

What is a physical change?

A

When atoms form in a new way to give us a mixture, but not a new substance

57
Q

What is a mixture?

A

A mixture is two or more different substances that are physically mixed and the change can be easily reversed

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