Rocks: Rocks From Melting

The video tutorial explains the differences between solid and molten rock, highlighting that molten rock, known as lava when above ground and magma when inside Earth, can reach temperatures of 1200 degrees Celsius. It describes the formation of igneous rocks from cooling lava, particularly basalt, which is abundant in Earth's crust. The texture of rocks, whether fine-grained or coarse-grained, depends on their formation location. The video concludes with how geologists classify igneous rocks based on these characteristics.

What is the primary difference between lava and magma?

• Lava is found inside the Earth, while magma is found above ground.

• Lava is a solid rock, while magma is a liquid.

• Lava is molten rock above ground, while magma is molten rock inside the Earth.

• Lava is cooler than magma.

What type of rock is most commonly found in the Earth's crust?

• Sandstone

• Granite

• Pegmatite

• Basalt

Where are igneous rocks typically found?

• In the ocean

• In deserts

• In and around volcanoes

• In riverbeds

What texture is associated with rocks that form on the Earth's surface?

• Smooth

• Fine-grained

• Rough

• Coarse-grained

Which rock is an example of one that forms inside the Earth?

• Sandstone

• Granite

• Basalt

• Limestone