Geography Grade 7 Flashcards

Study key terms (98 cards)

1
Q

What are the seven continents?

A

Africa, Asia, Europe, North America, South America, Australia, Antarctica

These continents are fundamental geographical units of the Earth.

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2
Q

List the five major oceans.

A

Pacific Ocean, Atlantic Ocean, Indian Ocean, Southern Ocean, Arctic Ocean

Oceans cover a significant portion of the Earth’s surface.

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3
Q

What is a Point Symbol?

A

Symbols that represent specific, individual locations or features on a map

Examples include hospitals, schools, and police stations.

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4
Q

Give two examples of Point Symbols found on a map.

A

Hospitals, Police Stations

These symbols help identify important services in a community.

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5
Q

What is a Line Symbol?

A

Symbols that represent linear features, such as roads or rivers

Examples include major roads and railway lines.

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6
Q

Provide two examples of Line Symbols.

A

Major Roads, Railway Lines

These symbols are crucial for understanding transportation routes.

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7
Q

Define Area Symbols.

A

Symbols that represent larger areas with specific characteristics

Examples include parks and residential areas.

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8
Q

Identify two examples of Area Symbols.

A

Parks, Residential Areas

Area symbols convey information about land use.

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9
Q

What is a scale on a map?

A

A scale shows the relationship between the distance on the map and the real distance on the ground

It helps measure distances without visiting the locations.

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10
Q

What is a Line Scale?

A

A straight line divided into equal parts, each representing a certain distance in real life

For example, 1cm = 1km.

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11
Q

What is a Word Scale?

A

A scale that uses words to explain the scale, such as ‘1cm represents 5km’

This provides a clear understanding of distances represented on the map.

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12
Q

What is the difference between Small-Scale Maps and Large-Scale Maps?

A

Small-Scale Maps show large areas with less detail; Large-Scale Maps show smaller areas with more detail

Example: A map of South Africa is small-scale; a town map is large-scale.

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13
Q

What is Direct Distance?

A

A straight line from one place to another (‘as the crow flies’)

This is measured with a ruler.

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14
Q

What is Indirect Distance?

A

A path that follows roads or curved lines

Measured using a piece of string or paper.

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15
Q

What is the purpose of a Compass Rose?

A

Shows all directions on a map

It includes cardinal and sub-cardinal points.

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16
Q

Name the four cardinal points.

A

North, South, East, West

These are the primary directions used for navigation.

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17
Q

What is an Earthquake?

A

A sudden shaking of the ground caused by movements in the Earth’s crust

It can cause significant damage and is measured using the Richter scale.

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18
Q

What is a Volcano?

A

A geological formation where magma rises through cracks in the Earth’s crust and erupts

Types include active, dormant, and extinct.

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19
Q

What is the difference between Lava and Magma?

A

Magma is molten rock inside the Earth; lava is magma that reaches the surface

This distinction is crucial in volcanology.

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20
Q

What causes floods?

A

Too much rain and rivers overflowing, or blocked drainage

Floods can lead to severe human and environmental impacts.

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21
Q

What is a Disaster Management Plan?

A

A plan to help communities prepare for and respond to natural disasters

This includes education and early warning systems.

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22
Q

What is a Grid on a map?

A

A system of horizontal and vertical lines that helps locate places

Grids make navigation easier.

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23
Q

What is an Epicentre?

A

The point on the Earth’s surface directly above the origin of an earthquake

It is crucial for understanding the impact area of an earthquake.

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24
Q

Fill in the blank: A _______ is a tool that shows directions using a needle that points north.

A

Magnetic Compass

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25
True or False: A dormant volcano is one that is currently erupting.
False ## Footnote Dormant volcanoes have not erupted in a long time but may erupt again.
26
What is the definition of Detect?
To find out or discover something, often using special tools or instruments.
27
What is a Disaster Management Plan?
A plan to help communities prepare for and respond to natural disasters like floods or earthquakes.
28
What is a Dormant volcano?
A volcano that is not currently erupting but has the potential to erupt in the future.
29
Define Earthquake.
A sudden shaking of the ground caused by movements in the Earth's crust.
30
What is an Earthquake Zone?
An area where earthquakes are most likely to happen due to tectonic plate movement.
31
What is the Epicentre of an earthquake?
The point on the Earth's surface directly above the origin of an earthquake.
32
Define Erupt.
When a volcano releases lava, ash, and gases from the Earth's interior.
33
What is a Fault Line?
A crack or break in the Earth's crust where tectonic plates meet and where earthquakes can happen.
34
What is a Flash Flood?
A sudden and rapid flood that happens due to heavy rainfall or other causes, often in areas with poor drainage.
35
What is a Flood?
An overflow of water onto normally dry land, often caused by heavy rainfall or melting snow.
36
Define Floodplain.
A flat area of land near a river or stream that is prone to flooding.
37
What is Food Security?
Having reliable access to enough nutritious food to live a healthy life.
38
What is a Fracture?
A break or crack in something, especially the Earth's crust or a rock.
39
What does Global Warming refer to?
The increase in Earth's average temperature due to pollution and human activity.
40
Define Hazard.
A potential source of harm or danger, like an earthquake, flood, or wildfire.
41
What is a Hot Spot in volcanic terms?
A place where volcanic activity is concentrated, usually far from tectonic plate boundaries.
42
Define Hypocentre.
The point inside the Earth where an earthquake originates, also known as the focus.
43
What is Lava?
Molten rock that erupts from a volcano, cooling to form solid rock.
44
Define Lithosphere.
The outer part of the Earth, including the crust and upper mantle, which is broken into tectonic plates.
45
What is Magma?
Molten rock inside the Earth that can erupt as lava from a volcano.
46
Define Magma Chamber.
The underground reservoir of magma beneath a volcano, where magma collects before it erupts.
47
What does Magnitude measure?
A measure of the size or power of an earthquake.
48
What is Map Scale?
A system on a map that shows how the distance on the map compares to the real distance on the ground.
49
Define Map Symbols.
Small pictures or shapes used on a map to represent things like cities, roads, or rivers.
50
What is a Magnetic Compass?
A tool used for navigation, showing directions based on Earth's magnetic field.
51
What is a Map Key (Legend)?
A guide on a map that explains the meaning of symbols and colours.
52
Define Ocean Basin.
The large, deep areas of the ocean floor between the continents.
53
What is Oceanic Crust?
The thinner part of Earth's crust that forms the ocean floor.
54
What does Semi-Molten mean?
Partially melted, like the hot, thick material found in the Earth’s mantle.
55
Define Seismic Activity.
Movements in the Earth's crust, such as earthquakes or volcanic eruptions, caused by the shifting of tectonic plates.
56
What does Silt Up refer to?
When small particles of soil, sand, and organic material build up in a body of water, often reducing water flow.
57
Define Soil Erosion.
The process by which soil is worn away by wind, water, or human activity.
58
What are Sub-Cardinal Points?
The directions in between the cardinal points: northeast, southeast, southwest, and northwest.
59
Define Tectonic Plate.
A large, rigid piece of Earth's lithosphere that moves on the Earth's surface, causing earthquakes, volcanoes, and mountain building.
60
What is a Vent in volcanic terms?
An opening in the Earth's crust through which gases, ash, and lava can escape.
61
Define Variable.
Something that can change or vary.
62
What is a Volcano?
A mountain or hill that opens up to allow molten rock, gases, and ash to escape from beneath the Earth's surface.
63
What is the Water Table?
The level below the Earth's surface where the ground is completely filled with water.
64
Define Wetland.
An area of land that is flooded with water for part or all of the year, such as swamps or marshes.
65
Fill in the blank: A __________ is a bowl-shaped opening at the top of a volcano.
Crater
66
Fill in the blank: A __________ is where very hot magma rises through the Earth’s crust.
Hot spot
67
Fill in the blank: __________ is melted rock that flows on the Earth's surface.
Lava
68
Fill in the blank: __________ is melted rock stored underground.
Magma
69
Fill in the blank: The __________ is where magma collects under a volcano.
Magma chamber
70
Fill in the blank: A __________ is a hole where lava and gases escape.
Vent
71
Fill in the blank: A __________ is a mountain made from lava and ash.
Volcano
72
Fill in the blank: To __________ means lava and gases come out of a volcano.
Erupt
73
Fill in the blank: A volcano that might erupt again is called __________.
Active volcano
74
Fill in the blank: The __________ shows the strength of an earthquake.
Richter scale
75
Fill in the blank: __________ is the power level of an earthquake.
Magnitude
76
Fill in the blank: An __________ is an area where earthquakes happen often.
Earthquake zone
77
Fill in the blank: A __________ is a crack in the Earth’s surface.
Fracture
78
Fill in the blank: The __________ is the place underground where the earthquake begins.
Hypocentre
79
Fill in the blank: The __________ is directly above the earthquake’s start on the surface.
Epicentre
80
Fill in the blank: __________ means the movement of rocks from their original place.
Displacement
81
Fill in the blank: A __________ is something that can cause harm or danger.
Hazard
82
Fill in the blank: A __________ collects rainwater that flows to rivers or dams.
Catchment area
83
Fill in the blank: A __________ is a fast and strong flood after heavy rain.
Flash flood
84
Fill in the blank: A __________ happens when water covers dry land.
Flood
85
Fill in the blank: A __________ is flat land that floods easily near rivers.
Floodplain
86
Fill in the blank: __________ means everyone has enough healthy food.
Food security
87
Fill in the blank: __________ is when Earth's temperature rises due to pollution.
Global warming
88
Fill in the blank: __________ is rainwater that flows across the land.
Runoff
89
Fill in the blank: When rivers slow down due to sand or soil, they __________.
Silt up
90
Fill in the blank: __________ is when topsoil is washed or blown away.
Soil erosion
91
Fill in the blank: A __________ is a system that drains rainwater away.
Stormwater system
92
Fill in the blank: The __________ is the top layer of underground water.
Water table
93
Fill in the blank: A __________ is an area with wet soil, like a swamp.
Wetland
94
Fill in the blank: If water covers land, it __________ it.
Submerges
95
Fill in the blank: To __________ means to survive or manage during a flood.
Cope
96
Fill in the blank: __________ diseases are caused by dirty water.
Waterborne
97
Fill in the blank: __________ are sand piles in rivers that can cause floods.
Sand banks
98
Fill in the blank: __________ is dirty water from toilets and drains.
Sewage