Match each type of rock with how it forms question 3 options: metamorphic igneous sedimentary 1. cooling of hot melted rock 2. changing from a rock that already exists through heat and pressure 3. hardening and cementing of fragments of rocks, plants or animal remains, and chemicals in lakes and oceans

Metamorphic : changing from a rock that already exists through heat and pressure.

Igneous : cooling of hot melted rock

Sedimentary : hardening and cementing of fragments of rocks, plants or animal remains, and chemicals in lakes and oceans

Explanation:

A rock cycle is a cycle is the cyclic rotation of the rocks in the geologic history of the earth and the rocks undergo changes form the primary to the second to the tertiary rock types as the first rock as the igneous rocks that are formed by the magmas and the lavas that heat the rocks and their melting process creates the igneous rocks. The metamorphic rocks are formed by the already existing rocks and are formed by the heat and pressure that lead to their formation and hence are get converted. The sedimentary rocks are thus formed by the hardening and cementation of the sedimentation as they tend to solidify form the remains of the plant and the animals and thus formed in the lake and the oceans.

Migration people get up and go cause they feel it is best for them 

Geothermic gradient is the rate of increasing temperature with respect to increasing the depth in the earths interior. away from tech tonic plates boundaries, it is about 25-40 c/km (72-87 degrees f/mi) of depth near the surface in most of the world.