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7th Grade Social Studies > Earth and Space > Flashcards

Earth and Space Flashcards

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1
Q

How many planets are in our solar system?

A

8

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2
Q

How long does it take the earth to rotate on its axis?

A

24 hrs

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3
Q

How long does it take the earth to revolve around the sun?

A

365 1/4

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4
Q

The inner planets are? Name the inner planets?

A

small and solid. Mercury,Venus, Earth, Mars

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5
Q

The Outer planets are? Name the outer planets>

A

Large and gassy. Jupiter, Saturn,Uranus and Neptune.

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6
Q

Every—–year we have an extra day in February to make up for the 1/4 day that is added on each year when we revolve around the sun. This is called Leap Year. What day does it occur on?

A

4th February 29th

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7
Q

We do not feel the earth move because of?

A

the atmosphere

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8
Q

At what degrees is the earth tilted on its Axis?

A

23 1/2

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9
Q

We have——–because of the earths tilt o its axis?

A

Seasons

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10
Q

Geography is

A

the study of its earth and its people

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11
Q

What are the 5 themes of geography?

A

location,place,human enviroment interaction,movement and region

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12
Q

Name the Earths 4 layers

A

inner core,outer core,mantle,crust

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13
Q

What does the theory of plate tectonics explain?

A

How the continents were formed and why they move.

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14
Q

South America and Africa were once one gigantic landmass named?

A

Pangaea

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15
Q

When plates collide what can be formed?

A

Mountains.

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16
Q

Name a mountain range that was created when plates collided?

A

Himalaya

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17
Q

The——were formed when continental plates and oceanic plates slide underneath a thick coninental plate causing magma to erupt.

A

Andes

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18
Q

The——–of fire is located in the Pacific Ocean because so many earthquakes and volcanoes are located there.

A

Ring Of Fire

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19
Q

What is it called when water and ice, chemicals and even plants wear away rocks into smaller pieces?

A

weathering

20
Q

———is where weathered rock is moved by water, ice or wind

A

Erosion

21
Q

——–are the highest landforms and are huge towers of rock.

A

Mountain

22
Q

Deep cuts in the ocean are called?

A

trenches

23
Q

What is the deepest trench in the world? Where is it located?

A

Mariana Pacific ocean.

24
Q

Earth is called the?

A

water planet

25
Q

The earth is made up of——– water?

A

70%

26
Q

How much of the earths water is fresh?

A

3%

27
Q

most of earths water is?

A

frozen in the polar regions

28
Q

What changes water from a liquid to a gas?

A

evaporation

29
Q

What takes place when water changes from gas back to a liquid?

A

condensation

30
Q

Precipitation can be?

A

rain sleet or hail.

31
Q

Weather refers to the————at the present time.

A

temperature

32
Q

———–is the weather over a period of years>

A

climate

33
Q

Name 2 storms where heavy rain falls?

A

El Nino and La Nina

34
Q

———can cause problems for interior regions because moisture and sun can not reach interior regions.

A

Rain Shadow

35
Q

How many world climate zones are there?

A

five

36
Q

What is acid rain?

A

Chemicals in air pollution combined with precipitation.

37
Q

What is the greenhouse effect?

A

Gases in the atmosphere trap the suns warmth

38
Q

Be able to give your opinion about global warming.

A

Your opinion

39
Q

Crop rotation-

A

changing what has been planted each year to save soil

40
Q

Deforestation-

A

cutting down trees without replanting

41
Q

conservation-

A

careful use of resources

42
Q

Irrigation-

A

process in which water is collected and distributed to crops.

43
Q

4 days in the year are significant. What day is the earths North Pole tilted towards the sun?What is this called? This is the day with the most sunlight.

A

June 21st Summer Solstice

44
Q

On——–the North Pole is tilted away from the sun. This is the day with the least amount of sunlight.

A

December22

45
Q

when is the spring equinox?

A

March 21

46
Q

When is the fall equinox?

A

September 23

7th Grade Social Studies (32 decks)

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