Answer:
150 million years old
Explanation:
If we have an isotope that has a half-life of 50 million years, we need just need to divide the numbers in order to get to one eight of the full number, than multiply it by 50 million in order to get the result.
If one half is 50 million years, than dividing one more half, which will gives one fourth of the total, will brings us to 100 million. Dividing the one fourth by two will leads to the one eight of the full number, and adding 50 million more years, we get 150 million years. So the rock in question has 150 million years of age.
Answer:
c) Magma C
Explanation:
The magma marked with C, is a felsic (rhyolitic) magma. This type of magma has high content of silica, making it highly viscous, and it also has high content of gases. The high content of gases comes from the high viscosity, as the gases are trapped inside the magma and can not get out of it. This results in eruptions of explosive or effusive type. When the magma rises, the temperature and pressure change, with results in explosion of the trapped gases in the highly viscous magma. Through this explosion, lot of pyroclastic material is shot out of the volcano in the surrounding area, making it very dangerous for everything in its surrounding area.
<u>Answer:</u>
A geothermal power plant is the alternative energy generation technology that requires burning fossil fuels to start generating electricity.
<u>Explanation:</u>
- A geothermal power plant derives its energy from the steam or from the heated up water that is present deep inside the surface of the Earth at some locations.
- The presence of steam or hot water at such locations is due to the heat available in the interiors of Earth.
- This heat is partially generated from the burning of fossil fuels that are present deep inside the Earth.
For what
There's no choices
