Magma

The video explains that magma's viscosity changes based on its composition and temperature, typically ranging from 700 to 1300°C. When magma erupts onto the Earth's surface, it becomes lava, which is commonly found at plate boundaries, hot spots, and volcanoes.

What factors affect the viscosity of magma?

• Pressure and density

• Composition and temperature

• Altitude and humidity

• Color and brightness

At what temperature range does magma typically exist?

• 200 to 500°C

• 1300 to 1800°C

• 500 to 1000°C

• 700 to 1300°C

What is magma called when it erupts onto the Earth's surface?

• Pumice

• Ash

• Basalt

• Lava

Where is lava most likely to be found?

• Mountains

• Plate boundaries, hot spots, and volcanoes

• Oceans

• Deserts

Which of the following is NOT a common location for lava occurrence?

• Volcanoes

• Forests

• Hot spots

• Plate boundaries