1
Proposed by Alfred Wegener, a theory that our continents were once a large piece of land called Pangea. It explained why there are similar animal and plant fossils across the sea.
2
They are the boundaries of the plate tectonics. There are three types: divergent, convergent and transform.
3
It is the contamination in bodies of water, such as lakes, oceans, rivers, aquifers and groundwater. It is caused by human action: dumping industrial waste, climate change which decreases oxygen level in waters, or deforestation.
4
It is a theory that explains the movement of the Earth’s surface, in which the earth is split into seven plates.
5
It is the presence of artificial light in the night environment. It is caused by unnecessary use of artificial light, which alters natural conditions.
6
A layer of the atmosphere. Protects us from solar radiation. The temperature increase going upwards in this layer because heat is being absorbed. This layer gets most of its heat from the sun.
7
It is the excessive amount of particles released into the Earth’s atmosphere. There are multiple causes of air pollution: factories, emission from vehicles, volcanos, etc.
8
A layer of the atmosphere. Absorbs the solar heat, causing the temperature to go up. This is where we see aurora.
9
An interior part of the Earth between the upper mantle and outer core. Consists of iron, oxygen, silicon, magnesium and aluminum. (Solid)
10
A layer of the atmosphere. It’s where all the weather happen due to the turning of the atmosphere. Temperature falls with height.
11
An interior part of the Earth between the crust and lower mantle. Consists of hot, silicate rocks. (Solid and liquid)
12
Caused by the movement of the Earth’s crust or volcanic action.
13
It travels beneath ground level, trapped in aquifers. The water there can be pumped above ground for irrigation and drinking.
14
Artificial lakes that are used to as a water supply source.
15
2.5% of all useable water on Earth. We use it to fulfill our basic needs for water: drinking, showering, laundry, watering plants etc.
16
A layer of the atmosphere. Temperature cools again because there are no particles that holds on the heat. This is where the the meteors burn up. Its heat comes from the stratosphere.
17
Not exactly a visible layer of the atmosphere. This is where the satellites orbit.
18
The innermost layer of the Earth, consists iron and nickel. (Solid)
19
An interior part of the Earth, just below the lower mantle. Consists of iron, nickel, sulphur and oxygen. (Liquid)
20
The rocks underground that transmits groundwater.
21
In water distribution, glaciers take up 69.5 percent of the freshwater on Earth.
22
A topographically high area that separates a landscape into different water valleys.
23
The outermost layer of the Earth. There are two types: continental and oceanic. (Solid)
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