A rock that formed from magma has very large crystals. How did it cool?

When coal is exposed to extremely high temperatures, it changes into a hard rock called

anthracite without melting.

Anthracite is most likely ______________

On a trip to the Southwest, Mario went on a nature walk. He found a rock that looked like

it was made of grains of sand. There were layers of different color in the rock in shades of

red and orange.

Mario's rock is most likely a(n) _____________

Greywacke is a rock commonly found in New Zealand. Muddy sand breaks into sediment

that is eroded by rivers. After it is deposited in deep water, that sediment is compressed

and sticks together, forming the gray rock known as Greywacke.

Greywacke is most likely a (n) __________

Rhyolite is a rock that can form from magma that cools. The rock can have large and small

crystals. Rhyolite forms more often from continental, or land-based, volcanic eruptions

than from eruptions in the ocean.

Rhyolite is most likely a(n)

Which type of rock was the first to exist on the planet?

Which type of rock forms when an existing rock changes under extreme pressure and intense heat?

Which type of rock forms through weathering, erosion and deposition?

Which of the following would be a clue that a rock is igneous?

Which of the following would be a clue that a rock is sedimentary?

Which of the following would be a clue that a rock is metamorphic?

Coquina is a rock made of small pieces of broken shells. Ocean waves break seashells into smaller pieces. Over time, these pieces are moved and deposited. When they stick together, they form coquina. Coquina is most likely a(n) ________.

Diorite is a rock with crystals. It can form when molten lava cools down in the Earth’s crust. Diorite is most likely a(n) ________ rock.

Quartzite is a rock that can form at the boundaries of tectonic plates. Over time, sandstone buried at the boundary is folded and changed by pressure and heat. The sandstone becomes quartzite. Quartzite is most likely a(n) ________ rock.

Pumice is a rock that forms during volcanic eruptions from lava that cools very quickly. Pumice is most likely a(n) ________ rock.

What did the metamorphic rock say during the test?