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scienece 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
what is fair test
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.
26
variable
Any factor that can be changed in an experiment
27
steps of writing
aim, hypothesis, equipment, method, results discussion
28
when a solid turns into a gas it is
sublimation
29
when a gas turns into a liqud it is
condensating
30
when a gas turns into a solid it is
deposistion
31
liqud to gas
evaporation
32
diffusion is
the movement of particles from high to low concentration until they are spread out evenly
33
cohesion is
the attractive forces between particles in a substance
34
Oh ooh woah wo oh yeah eaeaaaeeey
jess is cool
35
solution is
a mixture where one substance desolves into another
36
stuff that desolves is
the solvent
37
dilute solution
not enought milo
38
concentrated solution
perfect amount of milo
39
saturated solution
too much milo
40
colliod
where an insoluble mixture dosent settle nor float but stays spread out in the liqud
41
if the solid all together seprates from the liqud it is
suspension
42
density(kg m3 ⁄ ) = mass (kg) divided by volume (m3)
mass = volume × density volume = mass divided by density
43
compound
a substance made from two or more different elements that have been chemically joined.
44
heterogeneous
a mixture in which the composition is not uniform throughout the mixture. ( dose not mix )
45
homogeneous
opposite of heterogeneous
46
nucleus
controls what happens in the cell. Contains DNA
47
cell membrane
surrounds the cell and allows nutrients to enter and waste products to leave
48
cytoplasm
a jelly like substance whish the nuclear recation takes place
49
mitochondria
the power house of the cell ( makes energy )
50
cell wall
outer structure of plant cells and gives it structure
51
vacuole
storage organ in plants thats contain saps ( water, sugars, fruits )
52
chloroplast
contains chlorophyll and are the site of photosynthesis in plants
53
ribosome
produces protein
54
cellular respiration made out of
glucose + oxygen + water + carbon dioxide + energy
55
what is photosynthesis
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
cells with higher demand for energy will have more mitochondria e.g muscle cellss
57
for photosynthesis plants make excess glucose during the day and store it as starch in their roots
at night when glucose runs out they convert starch back into glucose to use for cellular respiration
58
plants:
make their own food, chloroplasts are the site of photosynthesis
59
animals:
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
carbon dioxide ( plants and animals )
animals want to get rid of it plants use it for photosynthesis
61
water ( plants and animals )
plants use it for photosynthesis, used in all cells, moisten tissues in eyes, nose and mouth
62
sperm cell:
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
egg cell:
produces off spring, found in ovaries, contaions yolk which provides portien for the new cell being formed
64
palisade cell
it stops water getting out of plant and organisms getting in, packed with chloroplasts to help make photosynthesis
65
ciliated cell
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
root hair cell:
allows plant to absorb more water, thin cell wall makes it easy for water to pass through
67
nerve cell:
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
red blood cell:
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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