Volcanic Eruptions and the Earth's Surface

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What is the main cause of a volcanic eruption?

The release of dangerous gases
The buildup of magma in a chamber beneath the volcano (correct)
The dissolution of gases in magma
The emission of water vapor

What is the primary result of the magma reaching the breaking point?

Dissolution of gases in magma
Lava flow onto the earth's surface (correct)
Release of dangerous gases
Emission of water vapor

What are the components of a volcanic eruption?

Lava only
Lava and various gases (correct)
Lava and water vapor
Carbon dioxide and sulfur dioxide only

What are the potential health effects of inhaling volcanic gases?

Serious health problems for animals and humans (C) Signup and view all the answers

Which statement about volcanic gases is true?

Gases are first brought to the surface by being dissolved in magma (C) Signup and view all the answers

What is the primary cause of pressure buildup before a volcanic eruption?

Rise in magma levels in the chambers below volcanic vents (D) Signup and view all the answers

What is the side effect of volcanic eruptions apart from the emission of lava?

Release of dangerous gases (B) Signup and view all the answers

What is the most abundant gas during a volcanic eruption?

Water vapor (B) Signup and view all the answers

How does water vapor contribute to the warming of Earth's surface?

By trapping heat in the atmosphere (C) Signup and view all the answers

Which gas is known for reflecting sunlight from the sun back into space?

Sulfur dioxide (D) Signup and view all the answers

What is a characteristic of carbon dioxide expelled through volcanic eruptions?

It is noncombustible (C) Signup and view all the answers

How does sulfur dioxide contribute to acid rain?

By decreasing the pH of rainwater (A) Signup and view all the answers

What is an effect of breathing in highly concentrated carbon dioxide?

Fatal to humans (B) Signup and view all the answers

Which gas contributes to irritation of the eyes and damage to the respiratory system when inhaled?

Hydrogen sulfide (B) Signup and view all the answers

What is a method to avoid inhaling dangerous volcanic gases?

Disable all ventilation systems near a volcano (C) Signup and view all the answers

How is volume measured?

By taking measurements of each side of the object and multiplying them (D) Signup and view all the answers

What is a simple way to measure volume?

Using measuring cups (D) Signup and view all the answers

What do two shapes with the same volume mean?

They would hold the same amount of water (B) Signup and view all the answers

What is the relationship between the appearance and volume of objects?

Objects with different appearances can have the same volume (B) Signup and view all the answers

What is NOT a valid method for measuring volume?

Estimating based on the appearance of the object (B) Signup and view all the answers