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Anna [14]
3 years ago
13

State the name of the radioactive isotope that has a half-life that is approximately the same as the estimated time of the origi

n of Earth.

Geography
1 answer:
jekas [21]3 years ago
4 0
After reviewing the graph you posted above, there is one radioactive isotope that has a half life that is approximate to the same as the estimated time of the origin of Earth. 

The radioactive isotope is called Uranium 238. You can also write this out as U-238 or uranium/u. Any of these are acceptable for the answer. 
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Which of the following organisms would be most likely to be preserved in the geologic record?
morpeh [17]

Answer:

Option (B)

Explanation:

For an organism to get preserve and form fossil, the organism must be comprised of a hard part and they should be immediately buried by the sediments after their death. The body of the organism must be detached from the oxygenated environment so that the body does not get damaged.

Mudflats usually refers to the coastal wetland areas that are commonly formed in the inter-tidal zone. They are also considered as the tidal flats. These mudflats are comprised of fine sediments that are carried from other places and are rich in organic matter and there is low or absence of oxygen. This helps in the preservation of fossils.

For example, clams with calcite shells that lived on the mudflat are most likely to be preserved in geological history.

Hence, the correct answer is option (B).

3 0
3 years ago
Why are there differences and life expectancies for people of different races
dedylja [7]

They have different bodily functions

Explanation:

Someone of different origin may have a different lifestyle which may affect there life expectancy

3 0
3 years ago
Is Jamaica in Africa
4vir4ik [10]
No how is that possible when there different countries?
5 0
3 years ago
Read 2 more answers
Assuming that the long term rate of displacement along the San Andreas Fault (about 3.5 cm/year) remains the same and that the l
Kisachek [45]

Answer:

17.71 years

Explanation:

  • As the crust of the San Andrea is continuously moving due to the tectonic activity and is the main manifest of the tectonic boundary of the North America and the pacific plate. This fault along with the pacific plate will move towards the Los angles and eastern San Francisco as it moves about 3.5 cm per year.
  • As  1 km equals to about 100 000 cm , then the distance of 620 km =  62, 000,000 cm  and 62,000,000 will be divided by 3.5 equal to  17. 71 years to collide with the eastern side.
5 0
3 years ago
Hello:) anyone able to help me with the 3rd point? I don’t understand it :( thank you !
Stels [109]

The two tectonic plates meet at point one. One is moving under the other, shown by the two arrows on the top pointing towards each other. The denser plate (left side) is subducted. This means the denser plate begins to go under the less dense plate. The lithosphere (crust/tectonic plate) is mainly solid rock. As it begins to go into the mantle it will begin to heat up as the mantle is hotter than the surface. The solid surface becomes a molten rock, known as magma. It melts as it goes down.

6 0
4 years ago
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