The difference between lava flows and fissures

The video explains the nature of lava flows during effusive eruptions, highlighting their varying sizes and speeds based on viscosity. It discusses how topography confines these flows and introduces volcanic fissures as linear vents for lava. Despite understanding magma flow directions underground, predicting the exact timing and location of fissure appearances remains challenging.

What factors determine the predictability of lava flow paths?

• The temperature of the eruption

• The color of the lava

• The time of day

• The viscosity of the lava

How are lava flows typically confined?

• By the speed of the eruption

• By the color of the lava

• By topography

• By the time of year

What are volcanic fissures?

• Small craters on the surface

• Linear vents for lava

• Circular openings in the ground

• Underground magma chambers

What is a challenge scientists face regarding volcanic fissures?

• Predicting when and where fissures will appear

• Measuring the speed of lava flow

• Determining the temperature of the eruption

• Predicting the color of the lava

What do scientists know about magma flow underground?

• The color of the magma

• The general direction of the flow

• The temperature of the magma

• The exact speed of the flow