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science term 4 (forces) > forces > Flashcards

forces Flashcards

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1
Q

what are forces

A

push or pull between two objects

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2
Q

what is a contact force

A

contact between two different objects

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3
Q

what is a non contact force

A

attraction or repulsion between two
objects

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4
Q

what are contact forces

A

push, twist, pulling,

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5
Q

gravitational force =

A

non contact force

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6
Q

is gravity a force

A

no

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7
Q

what are some non contact forces

A

Magnetism, electrostatic,

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8
Q

what do we measure forces in

A

newtons (N)

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9
Q

how do we represent a fore

A

arrows

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10
Q

Measuring the magnitude of a force

A

spring balance

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11
Q

balanced force

A

forces acting on an object are balanced perfect there is no resultant force

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12
Q

unbalanced force

A

unbalanced, or resultant, force is acting on an object, its motion will be changing (accelerate in the
direction of the net force)

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13
Q

If an object has no resultant force acting on it …

A

object will remain at rest or continue a constant speed, in a straight line

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14
Q

what is friction

A

opposes the movement between
two objects in contact.

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15
Q

Friction increases with ….

A

surface area

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16
Q

what is air resistance ( drag )

A

force that acts in the opposite direction to an object moving through the air

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17
Q

what is gravity

A

non-contact force that pulls objects towards the centre of the
Earth.

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18
Q

larger the mass of the objects…

A

stronger the force of gravity

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19
Q

what is mass

A

Mass is the amount of matter

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20
Q

what is weight

A

Weight is the force of gravity on a mass

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21
Q

what do we measure mass in

A

grames (G)

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22
Q

what do we measure weight in

A

newtons (N)

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23
Q

measure mass and weight

A

w = m x g
weight = mass x gravity

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24
Q

what is terminal velocity

A

reached mass

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25
Q

what is a cohesive force

A

force of attraction between
molecules of the same substance

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26
Q

what is an adhesive force

A

force of attraction between
molecules of different substances

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27
Q

what has the strongest surface tension of any liquid

A

water

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28
Q

what is Buoyancy

A

the tendency of an object to float in a fluid

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29
Q

what is surface tension

A

property of the surface of a liquid that allows it to resist an external force due to water molecules

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30
Q

3 field forces

A

gravitational, magnetic, electric

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31
Q

what are atoms made of

A

protones, newtons, electrons

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32
Q

`mrs gren:

A

movement, respiration, sensitivity, growth, reproduction, excretion, nutrition

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33
Q

taxonomic ranking:

A

classification of different things

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34
Q

7 levels of classification: ( dear kate…)

A

Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species

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35
Q

the five kingdoms:

A

bacteria, animal, plant, protist, fungi

36
Q

dichromatic key

A

mr men, choclate thing

37
Q

invertebrate:

A

animal without a backbone

38
Q

vertebrate:

A

animal with a backbone

39
Q

amthibian:

A

live on land and water, lay eggs in water ( frog, fish )

40
Q

reptiles;

A

live onland, lay hard eggs on land ( lizard, snake )

41
Q

ectotherm:

A

an animal that depends on the wheather for heat and coldness

42
Q

endotherm:

A

has its own body heat and uses that

43
Q

mammal

A

gets pregnant like a human

44
Q

placental:

A

gets pregnant (us, whales, foxes etc

45
Q

monotremes:

A

lay eggs ( only platypus and echidna )

46
Q

marsupials;

A

gives birth and then it climbs into pouch ( grotty kangarro )

47
Q

abiotic:

A

non living ( air, soil, rain )

48
Q

biotic

A

living ( plants, anaimals protists)

49
Q

food chain:

A

shows the flow of enrgy

50
Q

food web:

A

who eats who

51
Q

apex predators

A

the top of the food chain

52
Q

autotrophs

A

make their own food

53
Q

hetrotrophs

A

dont make their own food ( first consumers )

54
Q

herbivore

A

eats plants

55
Q

carnivore

A

eats meat ( usually second or higher in the food chain )

56
Q

omnivore

A

eats plants and meat

57
Q

food web order:

A

producers, primary consumers, secondary consumers, tertiary consumers

58
Q

where are tertiary consumers:

A

at the top of the food chain

59
Q

intraspecific competition:

A

cometition of the same species

60
Q

interspecific competition;

A

cometition of different species

61
Q

symbiosis:

A

living together

62
Q

parasitism:

A

one good and one bad

63
Q

mutalism

A

good, good

64
Q

commensalism

A

one good and one dosent care

65
Q

the three adaptions are:

A

structural, behavioural, physiological

66
Q

solar system consists of;

A

stars, planets, dawrf planets, comets and astroids

67
Q

is our solar system part of the milky way?

A

yes

68
Q

what are the order of planets freom the closest to the sun?

A

mercury, venus, earth, mars, jupitar,saturn, uranus, neptune

69
Q

what are stars made out of?

A

gas that give out light

70
Q

terrestrial planets:

A

the 4 closeset planets from the sun, merucry, venus, earth, mars

71
Q

dawrf planets:

A

plamets that are too big to be astroids and too small to be planets

72
Q

what is a satilite ?

A

A satellite is a moon, planet or machine that orbits a planet or star.

73
Q

what is the astroid belt?

A

of space between Mars and Jupiter where most of the asteroids in our Solar System are found orbiting the Sun.

74
Q

what is the goldilocks zone?

A

planets in the zone that arent too hot or too cold

75
Q

the hottest planet?

A

venus

76
Q

the earths axis is tilted….

A

23.5 degrees to the vertical

77
Q

the earths axis roates to the..

A

left ( anticlockwise )

78
Q

what is a solar eclipse

A

when the Moon passes between the Earth and the Sun (blocking out
the Sun’s light partially or entirely)

79
Q

what is a luna eclipse

A

when the Earth comes between the Sun and the Moon ( causing Earth’s shadow to be cast on the Moon)

80
Q

how many days does it take for the earth to rotate around the sun in eliptical orbit?

A

365 and a quarter

81
Q

the heliocentric theroy was proposed by who?

A

Aristarchus

82
Q

who showed more evidence for the sun being revolved around the earth?

A

copernicus

83
Q

what did Erastosthenes do?

A

he was the first person to accurately measure the circumference of the Earth

84
Q

what did Aryabhatta do?

A

he figured out how it takes the earth to revolve around the sun ( a year )

85
Q

what did Johannes Kepler do?

A

he realised that the planets were oval, not round

86
Q

what did Galileo Gallilei do?

A

created the teliscope

87
Q

issac newton is famous for

A

gravity theroy

science term 4 (forces) (1 decks)

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