NS Flashcards

1
Q

how is light energy transferred to us from the sun

A

by radiation

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2
Q

how many DEGREES HOT IS THE SUN

A

5 500 Degrees

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3
Q

how does the earth get hot

A

the infrared radiation coming from the sun which if absorbed by gases and objects on the earth warming them up

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4
Q

what is the imaginary ling that goes through the earth called

A

the earths axis( its tilted at an angle of 23,5)

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5
Q

what is the spinning movement around the axis called

A

a rotation

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6
Q

how do we get different seasons

A

because different intensities of light reach the Northern and Southern hemispheres at different times of the year

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7
Q

what do all living things need in order to make energy

A

food

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8
Q

what do plants use in the process of photosynthesis

A

sunlight from the sun
carbon dioxide from the atmosphere
water from soil

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9
Q

animals that get food by eating plants

A

herbivores

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10
Q

animals that eat other animals

A

carnivores

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11
Q

animals that eat plants and animals

A

omnivores

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12
Q

what does the radiation of the sun allow

A

it allows gases and objects on the earth to heat up

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13
Q

what does the water cycle depend on

A

on the energy of the sun

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14
Q

fossil fuels

A

coal, oil and gas

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15
Q

what type of energy is stored in these fossil fuels

A

chemical energy

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16
Q

why do we burn fossil fuels

A

for heat and electricity. Today we are very dependent on fossil fuels

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17
Q

why does our moon look bright in the night sky

A

it reflects the light from the sun

18
Q

which way does the moon revolve

A

anticlockwise

19
Q

what is gravity

A

the tendency of an object to attract or pull other bodies towards it due to its mass

20
Q

what are celestial bodies

A

large bodies in space

21
Q

what does the pull of gravity that two objects exert on each other depend on

A

the mass and how far away they are from eachother

22
Q

what is mass

A

the amount of matter in an object

23
Q

what is the largest object in the solar system

A

the sun

24
Q

what is a tide?

A

the rise and fall of the level of the seas and oceans. It is predictable and repeated

25
Q

what causes a tide?

A

The gravitational pull of the moon

26
Q

what are the two factors that affect gravity

A

mass and distance

27
Q

what is the antipodal tide caused by?

A

the centrifugal force created by the earth’s rotation

28
Q

what are spring tides

A

when the sun only impacts the tides when it is in certain positions relative to the earth

29
Q

when do spring tides occur

A

they occur when the earth, the sun and the moon are all aligned with each other every 14 days

30
Q

what is the intertidal zone

A

an area exposed to the air at low tide and submerged in water at high tide

31
Q

which sea animals do u see during a high tide zone

A

barnacles, limpets, anemones as well as crabs and green algae

32
Q

which fish species r in a low tide zone

A

abalone, hydroids, sea sponges and sea stars

33
Q

what is shale

A

a type of rock

34
Q

in which countries is fracking happening in

A

USA, Australia, and China

35
Q

in which two countries is fracking banned from

A

Canada and France

36
Q

what happens in the fracking process

A

involves drilling deep holes underground, up to 4 km deep after that, water and chemicals will be pumped underground to crack the shale rock and release the gas

37
Q
A
38
Q
A
39
Q
A
40
Q
A