Exploring Volcanic Eruptions and Effects (almost entire lesson 7

What is the primary component of lava that affects its viscosity?

• Water

• Silica

• Carbon dioxide

• Sulfur

Which of the following is a real-life example of a volcanic eruption that created new landforms?

• Mount Everest

• Mount Saint Helens

• Krakatau

• Grand Canyon

Explain how temperature affects the flow of lava.

• Higher temperatures make lava flow slower.

• Higher temperatures make lava flow faster.

• Temperature has no effect on lava flow.

• Lower temperatures make lava flow faster.

What is the Volcanic Explosivity Index (VEI) used for?

• Measuring the temperature of lava

• Predicting the frequency of earthquakes

• Predicting volcanic eruptions and their severity

• Measuring the depth of the ocean

Describe one way in which underwater volcanoes differ from volcanoes on land.

• Underwater volcanoes do not produce lava.

• Underwater volcanoes are always larger than land volcanoes.

• Underwater volcanoes can create islands.

• Underwater volcanoes are not affected by temperature.

How does the viscosity of lava affect the shape of the volcano it forms?

• High viscosity lava forms steep-sided volcanoes.

• Low viscosity lava forms steep-sided volcanoes.

• Viscosity has no effect on the shape of the volcano.

• High viscosity lava forms flat volcanoes.

Plan a simple experiment to demonstrate the effect of viscosity on lava flow using household materials.

• Use water and oil to show how different liquids flow.

• Use sand and gravel to show how different solids move.

• Use vinegar and baking soda to create a reaction.

• Use ice and salt to demonstrate melting.

What role do volcanic eruptions play in shaping Earth's surface?

• They only destroy existing landforms.

• They create new landforms and modify existing ones.

• They have no impact on Earth's surface.

• They only affect the atmosphere.

Compare the effects of ash fall from a volcanic eruption to the effects of lava flow.

• Ash fall is less widespread than lava flow.

• Ash fall can affect areas far from the volcano, while lava flow is more localized.

• Lava flow affects the atmosphere more than ash fall.

• Ash fall and lava flow have the same effects.

What is one method scientists use to predict volcanic eruptions?

• Measuring the height of the volcano

• Observing animal behavior

• Monitoring seismic activity

• Counting the number of trees nearby