Exploring Magma and Volcanic Activity

What are the primary conditions necessary for magma formation?

• Low temperature and low pressure

• High temperature and high pressure

• Low temperature and high pressure

• High temperature and low pressure

Tags

NGSS.HS-ESS2-3

Which of the following gases is commonly dissolved in magma?

• Oxygen

• Nitrogen

• Carbon dioxide

• Helium

What is the primary factor that affects the viscosity of magma?

• Temperature

• Color

• Density

• Volume

Tags

NGSS.MS-PS1-4

Which type of magma is characterized by low viscosity and high fluidity?

• Andesitic magma

• Basaltic magma

• Rhyolitic magma

• Granitic magma

What is tephra?

• A type of volcanic rock

• A type of volcanic gas

• Fragmented material ejected by a volcanic eruption

• A type of lava flow

Which of the following best describes a pyroclastic flow?

• A slow-moving lava flow

• A fast-moving current of hot gas and volcanic matter

• A type of volcanic ash

• A type of volcanic rock

Tags

NGSS.MS-ESS3-2

What is the effect of high silica content on magma viscosity?

• Decreases viscosity

• Increases viscosity

• No effect on viscosity

• Makes it more fluid

Which of the following is NOT a component of magma?

• Liquid rock

• Dissolved gases

• Solid crystals

• Ice

What is the primary cause of a pyroclastic flow?

• Earthquake activity

• Collapse of a volcanic dome

• Oceanic currents

• Wind erosion

Tags

NGSS.MS-ESS3-2

Which of the following best describes the texture of tephra?

• Smooth and glassy

• Coarse and angular

• Fine and powdery

• Soft and spongy