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scienece Flashcards

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Biology 101 flashcards
1
Q

independent variable is..

A

The variable that is deliberately changed at the START of an
experiment

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2
Q

dependent variable is..

A

the one you measure.

The factor that is observed to change by the END of the
experiment; it is thought to change due to the independent
variable

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3
Q

controlled variable is..

A

the one you keep the same

A variable that is deliberately kept the same DURING an

experiment

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4
Q

how do you start your aim

A

to investigate

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5
Q

hypothesis..

A

your prediction. If…then…

A proposed explanation for a set of observations based on

reason that is being tested in an experiment

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6
Q

equipment..

A

list, drawings

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7
Q

method

A

variables in experiment (indepndent controlled, dependent)

list the procedure

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8
Q

results:

A

table, graph, explain trend, reliable, valid, accurate, errors, improvements.

tgetrvaei

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9
Q

conclusion:

A

link to your hypothesis

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10
Q

reliable…

A

repetition, small range

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11
Q

accuracy..

A

avergae results, removed anomalies, few errors in practise

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12
Q

valid..

A

fair test,

independent variable,

realistic,

have your variable been measured correctly

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13
Q

parrallax errror:

A

not reading at eye level

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14
Q

human relfex error:

A

delayed response

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15
Q

zero error:

A

dont zero the scale before

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16
Q

qualitative

A

words

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17
Q

quantitative

A

numbers

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18
Q

Biology

A

The study of living things

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19
Q

Astronomy

A

The study of objects outside the Earth’s atmosphere

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20
Q

Chemistry

A

The study of substances and how they change

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21
Q

Ecology

A

The study of the community of living things in an environment,
and their interactions

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22
Q

Geology

A

The study of the physical structure and substance of the Earth

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23
Q

Physics

A

The study of forces and energy

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24
Q

Psychology

A

The study of human behaviour

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25
Q

what is fair test

A

An experiment where only ONE independent variable is
changed at the start, and all other variables are controlled; the
dependent variable, therefore, changes because of the
independent variable.

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26
Q

variable

A

Any factor that can be changed in an experiment

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27
Q

steps of writing

A

aim, hypothesis, equipment, method, results discussion

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28
Q

when a solid turns into a gas it is

A

sublimation

29
Q

when a gas turns into a liqud it is

A

condensating

30
Q

when a gas turns into a solid it is

A

deposistion

31
Q

liqud to gas

A

evaporation

32
Q

diffusion is

A

the movement of particles from high to low concentration until they are spread out evenly

33
Q

cohesion is

A

the attractive forces between particles in a substance

34
Q

Oh ooh woah wo oh yeah eaeaaaeeey

A

jess is cool

35
Q

solution is

A

a mixture where one substance desolves into another

36
Q

stuff that desolves is

A

the solvent

37
Q

dilute solution

A

not enought milo

38
Q

concentrated solution

A

perfect amount of milo

39
Q

saturated solution

A

too much milo

40
Q

colliod

A

where an insoluble mixture dosent settle nor float but stays spread out in the liqud

41
Q

if the solid all together seprates from the liqud it is

A

suspension

42
Q

density(kg m3 ⁄ ) =

mass (kg) divided by
volume (m3)

A

mass = volume × density

volume =
mass divided by
density

43
Q

compound

A

a substance made from two or more different elements that have been chemically joined.

44
Q

heterogeneous

A

a mixture in which the composition is not uniform throughout the mixture. ( dose not mix )

45
Q

homogeneous

A

opposite of heterogeneous

46
Q

nucleus

A

controls what happens in the cell. Contains DNA

47
Q

cell membrane

A

surrounds the cell and allows nutrients to enter and waste products to leave

48
Q

cytoplasm

A

a jelly like substance whish the nuclear recation takes place

49
Q

mitochondria

A

the power house of the cell ( makes energy )

50
Q

cell wall

A

outer structure of plant cells and gives it structure

51
Q

vacuole

A

storage organ in plants thats contain saps ( water, sugars, fruits )

52
Q

chloroplast

A

contains chlorophyll and are the site of photosynthesis in plants

53
Q

ribosome

A

produces protein

54
Q

cellular respiration made out of

A

glucose + oxygen + water + carbon dioxide + energy

55
Q

what is photosynthesis

A

the process by which green plants use sunlight to synthesize nutrients from carbon dioxide and water. Photosynthesis in plants generally generates oxygen as a by-product.

56
Q

cells with higher demand for energy will have more mitochondria e.g muscle cellss

A
57
Q

for photosynthesis plants make excess glucose during the day and store it as starch in their roots

A

at night when glucose runs out they convert starch back into glucose to use for cellular respiration

58
Q

plants:

A

make their own food, chloroplasts are the site of photosynthesis

59
Q

animals:

A

get glucose from the food they eat, the glucose diffuses into our blood where it gets transported to all the cells that need it

60
Q

carbon dioxide ( plants and animals )

A

animals want to get rid of it plants use it for photosynthesis

61
Q

water ( plants and animals )

A

plants use it for photosynthesis, used in all cells, moisten tissues in eyes, nose and mouth

62
Q

sperm cell:

A

designed to fertilize eggs, it i round with tail to swim, in male body, contations enzymes which allow it to digest into egg cell and join with it

63
Q

egg cell:

A

produces off spring, found in ovaries, contaions yolk which provides portien for the new cell being formed

64
Q

palisade cell

A

it stops water getting out of plant and organisms getting in, packed with chloroplasts to help make photosynthesis

65
Q

ciliated cell

A

designed to stop inhaled pathogens, they line up all their air passages in the lungs, have tiny hairs called cilia, hairs sweep dust and bacteria bavlk up the throat

66
Q

root hair cell:

A

allows plant to absorb more water, thin cell wall makes it easy for water to pass through

67
Q

nerve cell:

A

they are long, they have dendrite at each end, carries messages through body, their job is to carry nerve movement to different parts of the body

68
Q

red blood cell:

A

designed to carry oxyegn, found in blood, large surface area for oxygen to pass through, contains haemoglobin, which joins with oxygen, has no nuclear

science (7 decks)

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