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qaws [65]
3 years ago
8

How do we know plate tectonics exist (list 4-5 pieces of evidence) and why are there different boundaries?

Geography
1 answer:
Vanyuwa [196]3 years ago
6 0
Continent jig-saw shapes when puzzled and combined together, formed one big continent - Pangea, and was separated by drifts. Fossil comparisons of different species were discovered into two different, separated continents in which when you combine them, they were one in the past. Seismic, volcanic, and geothermal activity are found along imagined plate boundaries.  Plates were actually rubbing against each other as evidence is seen on the formed mountain ranges. Paleomagnetism, magnetic field placement in the layers of the rock are present. <span> </span>
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A(n) is a bend in a steep narrow bedrock valley. 2. The lowest level to which a stream can erode is called . 3. A(n) is the remn
borishaifa [10]

Answer:

1. Incised meander.

2. Base level.

3. Terrace.

4. Lake

5. Meander.

6. Floodplain.

Explanation:

Erosion can be defined as a geological process which typically involves the wearing out of earthen (soil) materials and the transportation of these materials by natural forces like water, wind, etc. Soil erosion is greatest when the soil is steep.

The steepness of a body such as river or stream refers to the downward slope or gradient of the body of water.

Generally, the steepness of a body affects the rate at which other materials would flow or move around. Thus, the steeper a river or stream, the greater would be its rate of erosion.

Some of the characteristics of an erosion include the following;

1. An incised meander is a bend in a steep narrow bedrock valley. It avails a river large amount of vertical erosion power and as such enabling a downcut.

2. The lowest level to which a stream can erode is called a base level. Some examples are dam, waterfall, lake, stream, etc.

3. A terrace is the remnant of a former floodplain.

4. Examples of local base level include a stream or a lake.

5. A sweeping bend of a stream which is migrating laterally in a wide, flat valley is called a meander.

6. The flat, broad area surrounding a stream is referred to as a floodplain.

3 0
3 years ago
What region on Earth produces 20% of the planet’s oxygen?
nexus9112 [7]

Answer:

The Amazon Rainforest

Explanation:

3 0
2 years ago
Give me Questions about NGO (non-governmental organization)
Monica [59]

Answer:

ok

Explanation:

Does the NGO support the long- term vision and strategy of the company?

Will it engage and inspire employees at all levels ?

hope this helps

7 0
2 years ago
How many countries are there in earth?
a_sh-v [17]
There is a grand total of 196 countries in the world. Hope this helped.
3 0
3 years ago
Read 2 more answers
Bowen’s continuous reaction series describes the crystallization behavior of a singlemineral (with variable chemical composition
FromTheMoon [43]

Answer:

C. plagioclase

Explanation:

From the magma silicate crystals are formed successively when the magma temperature reaches the typical melting temperature for each type of crystal. The first crystals formed at high temperatures can then change their composition or dissolve again. In this way the crystals already formed contribute their ions, molecules and atoms to magma and combine again forming new crystals whose melting temperature is lower than that of the first crystals formed. The new crystals are said to be stable at the lowest temperatures set now. These processes of change are called reactions. As several successive reactions occur as the magma temperature decreases the ordered series of reactions is called the BOWEN series in honor of the Canadian scientist who formulated this concept. There are two types of reactions, the continuous reaction and the discontinuous reaction.

<u> By continuous reaction a crystal formed at high temperatures such as a plagioclase rich in the Ca2 +</u> component gradually varies its composition by replacing a portion of the Ca2 + ions with the Na + ions and a portion of the Al3 + ions with the Si4 + ions. To maintain its neutrality, the replacement of Ca2 + by Na + is coupled with the replacement of Al3 + by Si4 +. The series of continuous reaction starts from the plagioclase rich in Ca2 +, passes through several plagioclase of intermediate composition towards the plagioclase rich in Na +

5 0
3 years ago
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