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Gr4 NST > nst term 4 > Flashcards

nst term 4 Flashcards

1
Q

what are features?

A

interesting or noticeable parts of something

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2
Q

what is a sphere?

A

a round shape like a ball
all planets are spheres

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3
Q

what is the surface?

A

the outside part or top layer of something

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4
Q

what is soil?

A

sand that is mixed with dead or rotting material

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5
Q

what is earth’s water surface?

A

large areas of water that cover earth’s rocky surface where it is
hollowed

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6
Q

what are oceans?

A

the largest of earth’s water surfaces, which are salty seawater

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7
Q

what are seas?

A

smaller water surfaces, that are parts of the ocean so are also salty seawater

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8
Q

what are continents?

A

one of seven large pieces of earth’s surface

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9
Q

what is an island

A

a piece of land that is smaller than a continent and surrounded by seas

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10
Q

what are lakes?

A

large areas of water than have land all around them

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11
Q

what is the atmosphere?

A

the layer of thin air that surrounds earth

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12
Q

what shape is earth?

A

a sphere

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13
Q

what is earth made of?

A

rock

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14
Q

is the earth solid or liquid?

A

both - the surface is hard solid rock but the centre is so hot that the rock has melted to liquid

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15
Q

why is Earth called the blue planet?

A

all the water on earth’s surface (on 71% of the surface) makes it look blue from space

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16
Q

what are Earth’s land surfaces?

A

the parts of Earth’s that are not covered by water. These are either continents or islands

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17
Q

how high above Earth’s surface does the atmosphere go?

A

About 600km

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18
Q

why is the so atmosphere important?

A
  1. It contains the gases that all living things need to BREATH
  2. It acts like a BLANKETS to keep Earth’s surface warm enough for living things to survive
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19
Q

what is a planet?

A

a large object that moves around a star

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20
Q

what are stars?

A

objects in space that give off their own light

21
Q

what is the sun?

A

a very bright star that gives light and warmth to planet Earth

22
Q

what is the moon?

A

a cold round object that always moves around Earth

23
Q

How many planets does the Sun have?

A

8

24
Q

what is space?

A

the never-ending darkness that is above the Earth’s atmosphere

25
Q

what is in space?

A

stars, planets, and many other objects as well as gas and dust

26
Q

what are astronauts?

A

people that travel to space

27
Q

when can we see the sun?

A

in the daytime, when our half of the Earth is facing toward the sun

28
Q

what is the nearest object in space to the earth?

A

the moon

29
Q

where are the stars during the day?

A

in the same place in the sky in space but you just can’t see them because the sun’s light is much brighter

30
Q

how many stars are there?

A

Millions (but we can’t actually count them all because we can only see some of them)

31
Q

what does orbit mean

A

the pathway along which the Earth moves around the sun

32
Q

what is the solar system

A

the sun and all the objects that move around it

33
Q

what type of planet is the Earth?

A

a terrestrial planet

34
Q

What is a year on earth?

A

365.25 days
the time it takes for the Earth to do a full orbit of the sun.

34
Q

What features does Earth have that other planets do not?

A

Earth is the only planet with LIFE on it and no other planet has liquid WATER

35
Q

How many planets is the Earth from the Sun?

A

Earth is the 3rd planet from the Sun

36
Q

What is the sun made of?

A

very hot burning gases

37
Q

Why is the Sun so important for life on Earth?

A

life need the Sun’s heat and light energy
without the sun it would be dark and freezing cold, so plants and animals would not survive

38
Q

How big is the Sun?

A

The Sun is 110 times the diameter of Earth

39
Q

How far away from Earth is the sun?

A

about 150 million kilometres

40
Q

Is the sun a bright star?

A

No, it just seems that way because it is so much closer to Earth than any other stars

41
Q

what direction does the Earth travel around the sun?

A

anticlockwise

42
Q

what is the centre of the solar system?

A

the sun
(solar system literally means the sun’s system)

43
Q

What does life on Earth need to survive in addition to the Sun’s energy?

A

water

44
Q

What starts the energy chain?

A

light from the Sun

45
Q

what happens to plants and animals when they get too or too little heat?

A

they die

46
Q

why do seeds need warmth?

A

to grow

47
Q

why do animals need warmth?

A

to maintain their life processes

48
Q
A

Gr4 NST (6 decks)

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