Rocks Quiz #1

Some magma cools and hardens while it’s still underground. Liquid magma can also be spewed onto the surface through volcanic activity. At Earth’s surface, whether it is in open air or underwater, the magma cools and hardens into new rocks.

What type of rock is this about?

Loose sediment moves downhill, usually into a low place where there’s water, like a lake or the ocean. Layers of sediment begin to build up in the water. Over time, all those layers press on the layers below, compacting the sediment at the bottom. Minerals in the water also create a kind of “glue” that holds the compacted sediment together in a process called cementation. Together, the compaction of many layers and the mineral “glue” transform sediment into new layers of rock. What type of rock is this about?

Which claim do you think is correct?

What kind of rock was that? Look back to read the card if you need to.

What kind of rock was that? Look back to read the card if you need to.