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NST Evan Grade 4 > Space > Flashcards

Space Flashcards

1
Q

What is the function of the atmosphere?

A
  • Protects earth from the Sun’s harmful rays
  • Allows us to breath
  • Keeps the earth warm (right temperature for living things to survive)
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2
Q

What is our nearest star?

A

The Sun

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3
Q

What is the difference between an ocean and a sea?

A

Ocean is much larger.

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4
Q

What is the atmosphere?

A

The letter of air (gases) that surround the earth

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5
Q

What is earth’s atmosphere made up of?

A

Many gases such as:
* Oxygen
* Nitrogen
* Carbon dioxide

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6
Q

Is earth a terrestrial or gaseous planet?

A

Terrestrial

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7
Q

How much of the earth’s surface is covered with water?

A

71%

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8
Q

What shape is the earth?

A

Sphere

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9
Q

What are the features of earth?

A

Is the 3rd planet from the sun.
It is a spherical shape, made up of rock which is solid except for the inner core (which is hot molten).
Covered with water (71%)
Covered with a layer of gases (oxygen, nitrogen, carbon dioxide) called the atmosphere.

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10
Q

What is the difference between sand and soil?

A

Soil is sand with dead and rotten material (plants and animals) in it.
Sand is just eroded rock

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11
Q

What color does earth appear from space? Why?

A

Blue
Because it is morally covered in water

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12
Q

List the continents

A

Europe
North America
South America
Africa
Australia
Antarctica
Asia

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13
Q

How far above the earth’s surface does the atmosphere extend?

A

600km

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14
Q

What is a habitat? Give some examples

A

The place where something lives.
Eg.
* a lake (for fish etc)
* a Savannah (for lions etc)
* a desert (for camel)

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15
Q

What is the nearest object to Earth in space?

A

Moon

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16
Q

What is a planet ?

A

A large object that orbits a star.

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17
Q

What kind of energy does the sun emit?

A

Light and heat

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18
Q

How many times bigger is the Sun’s diameter than earth’s?

A

110 times bigger

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19
Q

How far away from the sun is earth?

A

About 150 million kilometers

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20
Q

What is an orbit?

A

The pathway that a planet goes around a star or a satellite goes around a planet.

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21
Q

What is the solar system?

A

The sun and all the objects that orbit it

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22
Q

What is the pathway that earth moves around the sun called?

A

An orbit

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23
Q

What direction does the earth travel around the sun?

A

Anticlockwise

24
Q

What is at the center of the solar system?

A

The sun

25
Q

What is the word for sun in Latin?

A

Sol

26
Q

How many stars in the solar system?

A

One (the sun)

27
Q

How does the sun support life on earth?

A

By providing light and heat energy

28
Q

What starts all energy chains on earth?

A

The sun’s light

29
Q

What do seeds need warmth for?

A

To grow

30
Q

What do animals need rest for?

A

To maintain their life processes

31
Q

What are the seven life processes?

A

Respiration
Consuming
Growth
Movement
Sensitivity
Excreting
Reproduction

32
Q

What are the defining characteristics of a planet? (What makes a planet a planet?)

A

A large sphere that
orbits the around the sun,
Which dominates its orbit.

33
Q

What is a crater?

A

A round hole made by an asteroid hitting a body of rock

34
Q

What is the moon made of?

A

Rock

35
Q

Describe the surface of the moon

A

Not smooth.
Dusty.
Covered with pieces of broken rock.
Has large holes called craters.
Has no proper soil.

36
Q

What have astronauts discovered about moon rocks?

A

They are similar to earth rocks

37
Q

Why can the moon not support life?

A

There is no air and
There is no liquid water
It is never the right temperature

38
Q

Where do scientists think there might be water on the moon?

A

As ice in shaded craters where it is cold

39
Q

What is the distance from the moon to the earth, in kilometers?

A

384 400km

40
Q

How long does it take light to travel to the earth from the sun?

A

8 min

41
Q

How long does it take light to travel to the earth from the moon?

A

1.5 seconds

42
Q

What is the closest body in space to earth?

A

The moon

43
Q

In general, what are phases of the moon?

A

The different shapes of the moon due to the changing pattern of sunlight on the moon

44
Q

How does the moon appear bright?

A

Sunlight reflecting from the surface of the moon. Moon does not produce its own light

45
Q

Why does the moon not always look fully round?

A

Because the sun cannot shines on all of the moon at the same time. Only the part that the sunlight hits is lit

46
Q

Name the phases of the moon

A

New moon
Waxing crescent
First quarter
Waxing gibbous
Full moon
Waning gibbous
Last quarter
New moon

47
Q

If it is a new moon now, how long until it is a new moon again?

A

29.5 days

48
Q

What is a rocket?

A

Long tall structure that can be launched into space.

49
Q

What does it mean to launch?

A

To send a space craft into space

50
Q

What is gravity?

A

The force that keeps things on earth.

51
Q

What is a payload?

A

The people, equipment or other space craft carried by a rocket

52
Q

What is a vehicle?

A

A machine that is used to transport things and/or people from one place to another

53
Q

What does it mean to propel?

A

To move something forward

54
Q

What makes a rocket a system?

A
  • It uses multiple parts that work together to make it launch.
  • It has an energy input of fuel
  • it has an energy output (big flames out of the bottom of it propelling it upwards)
55
Q

Why does a rocket need energy?

A

To propel it fast enough to
* escape earth’s gravity and
* push through earth’s atmosphere
and get into space

NST Evan Grade 4 (4 decks)

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