Which phenomenon leads to the formation of metamorphic rocks?
a. cooling of magma
b. deposition of sediments
c. heat and pressure
d. melting of rocks
e. minerals dissolving in water

The correct answer is C) heat and pressure.

The phenomenon that leads to the formation of metamorphic rocks.

Chemical alteration by heat and pressure create metamorphic rocks. Rocks on planet Eart are deformed and warped due to the action of plate tectonics, stress, and compression over many years. These rocks are then compacted so they are denser than their original material and there are not as sensitive to erosion.

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

a: 45.9 meters

b: 4.29 seconds

step-by-step explanation:

a: h(t)=1/2(-9.8)(3)^2+0(3)+90

h(t)=-4.9(3)^2+90

h(t)=-44.1+90

h(t)=45.9 meters

b: 0=1/2(-9.8)(t^2)+0t+90

0=-4.9t^2+90

-90=-4.9t^2

18.37=t^2

t=4.29 seconds

in the second question, the numbers aren't exact, but they're a close approximation.