Answer:
false Metamorphic rocks can only form from pre-existing rocks. Metamorphic rocks only form as a result of metamorphism of igneous or sedimentary rocks. Rock melting to form magma defines the upper limit of metamorphic processes. The oldest rock exposed to Earth's surface is a metamorphic rock.
Explanation:
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Answer:
Mariana trench is the deepest trench in the world. Now there is a difference of gravitational force between that of the earth surface and the trench. The reason is that the trench depth is about 10.9 Km and the radius measured from the surface to the center of the Earth is about 6,371 km.
So the trench is more deeper then the surface of earth and the pull of gravity will be different due to that reason inside that region.
Explanation:
Now, we can just subtract the depth of the trench from the radius "r" given, we get:
6,371×10³-10.9×10³ m = 6360.1 km,
Now simplifying the numbers (gravitational constant times mass of earth divided by that radius (6360100 m) squared.
We will get 9.8473 m/s².
The value of gravitational force will be 9.8473 m/s² inside Mariana trench
- <em>We are provided by the Newton's Gravitational</em>
Geologists use a tiltmeter to measure the titling of the ground along a fault line. A tiltmeter is a very sensitive instrument known as a inclinometer which is designed to measure very minor changes in the angle of ground or buildings/structures.
A pattern of stars in a particular region of the night sky is know as a constellation.
