unit 2 lesson 4

The formation of igneous rock is related to magma.  How is magma different from lava?

• Lava is magma that erupts onto Earth's surface.
• Lava is hot, liquid rock and magma is solidified lava.
• Lava forms intrusive rocks and magma forms extrusive rocks.
• Lava forms foliated rocks and magma forms nonfoliated rock.

Clastic sedimentary rock and organic sedimentary rocks are both kinds of sedimentary rocks.  What do they have in common?

• They are made up of the same kinds of minerals.
• They are formed when melted rock cools and hardens.
• They are made up of the remains of plants and animals.
• They are formed from layers of sediment.

Which of the following best describes how sedimentary rock forms?

• molten rock beneath the surface of the Earth cools and becomes solid
• layers of material become compressed to form rock
• chemical processes or changes in pressure or temperature change the texture and composition of a rock
• molten rock reaches Earth's surface and cools to become solid rock

A volcanic eruption took place about 2 billion years ago and released lava onto Earth's surface.  The lava cooled to form basalt.  Which processes will be needed to transform the basalt into sedimentary rock?

• sifting and floating
• heating and cooling
• uplift and subsidence
• erosion and deposition

What are the two methods used to classify rocks? 

• composition and texture
• texture and liquid
• solid and gas
• color and minerals

The three main categories of rock are

• minerals, magma and lava
• igneous, sedimentary and metamorphic
• coal, natural gas and oil
• igneous, magma, sedimentary

This forms when magma beneath Earth's surface and lava flowing across Earth's surface cool and solidify

• igneous rock
• metamorphic rock
• sedimentary rock
• magma

This rock forms when magma cools and solidifies beneath Earth's surface

• extrusive igneous rock
• intrusive igneous rock
• sedimentary rock
• magma

This rock forms when magma lava cools and solidifies at Earth's surface

• extrusive igneous rock
• intrusive igneous rock
• sedimentary rock
• magma

This rock forms when sediment is deposited and compressed

• igneous rock
• sedimentary rock
• metamorphic rock
• magma