Plate tectonic is a scientific theory that says the Earth’s lithosphere is divided into several plates. The plates glide over the mantle. In early 20th century, this theoretical model builds on the concept of continental drift. It was first proposed by the scientist Alfred Wegener in 1912. After seafloor spreading was validated, the theory was accepted by the geoscientific community.
Answer:
volcano
A volcano is most commonly a conical hill or mountain built around a vent that connects with reservoirs of molten rock below the surface of the Earth. The term volcano also refers to the opening or vent through which the molten rock and associated gases are expelled.
Explanation:
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The Presidential election in Nigeria in 1999 was significant
because it is the first election after the 1993 coup and it is the first
election of the Nigerian republic. In this election, Olusegun Obasanjo won over
Olu Falae. 62.78% of votes was casted under Obasanjo.
Some examples of a hydrosphere are:
- Seas – the Black Sea, Caspian Sea, Persian Gulf, Adriatic Sea, Mediterranean Sea, and the Red Sea.
- Glaciers,
- Lakes.
- Rivers.
- Streams.
- Clouds.
<h3>What is a Hydrosphere?</h3>
This refers to the total amount of water on a planet and includes water that is on the surface of the planet, underground, and in the air.
Hence, we can see that some of the components of a hydrosphere are liquid and frozen surface waters, groundwater held in soil and rock, and atmospheric water vapor.
Therefore, Some examples of a hydrosphere are:
- Seas – the Black Sea, Caspian Sea, Persian Gulf, Adriatic Sea, Mediterranean Sea, and the Red Sea.
- Glaciers,
- Lakes.
- Rivers.
- Streams.
- Clouds.
Read more about hydrosphere here:
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