Question

natural events and climate
multiple choice: write the letter of the correct answer in the blank.

1. how can a large meteor impact influence the earth’s climate?

a. by creating large waves in the ocean
b. by releasing greenhouse gases into the atmosphere
c. by throwing dust and particles into the atmosphere, which can block sunlight
d. by increasing the earth’s rotation speed

1. what is the role of greenhouse gases in the earth’s climate?

a. they help keep the earth’s temperature stable by trapping heat.
b. they reflect sunlight away from the earth, causing cooling.
c. they are released only during volcanic eruptions.
d. they react in the atmosphere to distribute nutrients and warmer climates throughout earth.

1. how can changes in ocean currents influence climate?

a. they cause volcanic eruptions.
b. they have no impact on the climate.
c. they only affect the weather in coastal areas.
d. they can change temperature patterns, making some areas warmer and others cooler.

1. how does the release of sulfur dioxide during a volcanic eruption affect the climate?

a. it makes the oceans warmer.
b. it has no effect on the earth’s climate.
c. it causes the earth to warm by absorbing more sunlight.

Explanation:

1. A large meteor impact blasts dust and particles into the upper atmosphere, which reflect and block incoming sunlight, cooling the planet and altering climate.
2. Greenhouse gases (like CO₂, methane) trap infrared heat radiated from Earth's surface, maintaining stable temperatures suitable for life.
3. Ocean currents act as global heat redistributors: warm currents transfer heat to cooler regions, while cold currents bring cooling to warmer areas, creating regional climate differences.
4. Sulfur dioxide from volcanic eruptions reacts in the atmosphere to form sulfate aerosols. These aerosols reflect sunlight back into space, causing a temporary cooling effect on Earth's climate. (Note: Option C is partially visible but incorrect; the correct cooling effect aligns with the mechanism of blocking sunlight, which is the standard volcanic SO₂ climate impact.)

Answer:

1. C. by throwing dust and particles into the atmosphere, which can block sunlight
2. A. They help keep the Earth's temperature stable by trapping heat.
3. D. They can change temperature patterns, making some areas warmer and others cooler.
4. (The correct mechanism is cooling; assuming the full unlisted correct option matches this, but based on standard science, the answer aligns with the sunlight-blocking cooling effect. For the visible options, the intended correct answer would follow the aerosol cooling mechanism.)