Types of rock
Please tell the difference between lava and magma.
Magma is inside the Earth. Lava is outside the Earth.
This rock forms from cooled magma and is often found near volcanoes, like granite.
Igneous rock
Name one intrusive igneous rock
granite
What is the process where rocks break down into smaller pieces?
Weathering
Igneous rock
Metamorphic rock
Sedimentary rock
Sand and shells pressed together over time create this type of rock, such as sandstone.
Sedimentary rock
Name the two extrusive igneous rock and one intrusive igneous rock
Extrusive: Basalt, pumice
Intrusive: Granite
What type of rock can be changed into metamorphic rock by heat and pressure?
Any type of rock (igneous, sedimentary, or metamorphic)
1.This type of rocks is also called a fire rock
2.This rock sometimes has fossils inside it.
Igneous rock
Sedimentary rock
What are small pieces of rock and sand called that form sedimentary rocks?
Sediments
Which rock can float on the water, and is full of holes because it forms from foamy lava?
Pumice
What is the difference between weathering and erosion?
Weathering:rocks break into smaller pieces
Erosion:when water, ice or wind moves rock pieces to new places
What are the two types of igneous rock, and what is the difference between them?
The two types of igneous rock are intrusive and extrusive. Intrusive rocks form when magma cools slowly inside the Earth. Extrusive rocks form when lava cools quickly on the surface.
What metamorphic rock forms from limestone?
Marble
name one sedimentary rock and one metamorphic rock
limestone, sandstone
Marble, Slate
Why do we say, “Today’s igneous rock could be tomorrow’s sedimentary rock”?
Igneous rocks erode into sediment to form new sedimentary rocks.
Diamonds form from which type of rock?
Metamorphic rock
Which rock is called the "writing stone" because ancient people carved messages on it?
A.片岩（Schist）
B.板岩（Slate）
C. 滑石（Talc）
Which rock was used by ancient humans to start fires because it sparks when struck?
A. Obsidian
B.Basalt
C. Flint
C
Why does the rock cycle have "no true beginning or end"?
All rock types can transform into each other endlessly.