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Comets, asteroids, and meteoroids may be responsible for delivering a significant fraction of the current supply of ___ to Earth. a. mass b. water c. oxygen d. carbon

Short Answer

Expert verified
b. water

Step by step solution

01

- Understand the Question

The question asks what comets, asteroids, and meteoroids might have delivered significantly to Earth.
02

- Analyze Answer Choices

Review the answer choices: a) mass, b) water, c) oxygen, d) carbon.
03

- Scientific Knowledge

Consider the scientific consensus: Comets are known to contain ice, and asteroids sometimes contain hydrated minerals. This suggests they could have delivered water to Earth.
04

- Eliminate Incorrect Options

Mass (a) is too vague, oxygen (c) is a minor component of cometary composition, and carbon (d) is also possible but not as significant in terms of overall delivery compared to water.
05

- Select the Best Answer

Given the evidence, the most accurate answer is b) water.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Water Delivery
The idea that space objects like comets, asteroids, and meteoroids could have delivered water to Earth is both fascinating and scientifically supported. Comets, for instance, contain a considerable amount of ice. When they travel through space and occasionally collide with planets, this ice can be delivered to the planet’s surface. Asteroids, though mostly rocky, can also carry hydrated minerals. These minerals contain water molecules that could have been released upon impacting Earth.

Such collisions were more frequent in the early solar system, a period known as the Late Heavy Bombardment. During this time, many space objects hit the Earth, potentially delivering substantial amounts of water. This water could have then contributed to Earth's oceans and other bodies of water. Scientists continue to study these processes to better understand how vital resources like water arrived on our planet.
Space Objects
Space objects, particularly comets and asteroids, hold a treasure trove of information about the early solar system. Comets are often described as 'dirty snowballs' because they are composed of ice, dust, and other organic compounds. When these objects come close to the Sun, they can develop spectacular tails, adding to their intrigue.

Asteroids, on the other hand, are mainly composed of rock and metal. Found predominantly in the asteroid belt between Mars and Jupiter, these remnants from the solar system's formation offer insights into the building blocks that formed planets. Some asteroids also contain ice or hydrated minerals, indicating they, too, could have delivered water to Earth. By studying comets and asteroids, scientists can gain a deeper understanding of the materials that were available during the early stages of our planet’s development.
Earth's 91Ó°ÊÓ
Earth's resources, such as water, minerals, and organic compounds, may have originated from space objects. During the formative years of our solar system, Earth was bombarded by numerous comets and asteroids. These impacts brought various elements that are essential for life.

The delivery of water by comets and asteroids could have been crucial in creating the conditions necessary for life to develop. Other space objects might have brought organic compounds, which are the building blocks of life. Minerals delivered by asteroids could have also contributed to Earth's geological diversity.

Understanding the role of these space objects in shaping Earth's resources can provide insights into the origins of life and the formation of our planet's ecosystems. Continuous research and space missions aim to gather more data to unravel these mysteries further.

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Most popular questions from this chapter

What are the differences between a comet and a meteor in terms of their size, distance, and how long they remain visible?

Comets have two types of tails. Describe them and explain why they sometimes point in different directions.

Kuiper Belt objects (KBOs) are actually comet nuclei. Why do they not display comae and tails? a. Most of the material has already been stripped from the objects. b. They are too far from the Sun. c. They are too close to the Sun. d. The comae and tails are pointing away from Earth, behind the object.

Citizen science projects: a. Go to Asteroid Zoo (http://www.asteroidzoo.org/). What are the science goals of this project? Click on "Classify" and read through the Tutorial and Guide. Classify some frames, and save a copy for your homework. b. Go to cosmoquest (https://cosmoquest.org), and click on Asteroid Mappers. What are the science goals? Read through the FAQ and the Tutorial. If you don't already have an account (from Moon Mappers), create one. Log in and get some images, and mark some craters. Do they have data on Ceres? If so, analyze some of those images too.

Earth's Moon has a diameter of \(3,474 \mathrm{km}\) and orbits at an average distance of \(384,400 \mathrm{km}\). At this distance. it subtends an angle just slightly larger than half a degree in Earth's sky. Pluto's moon Charon has a diameter of \(1,186 \mathrm{km}\) and orbits at a distance of \(19,600 \mathrm{km}\) from the dwarf planet. a. Compare the appearance of Charon in Pluto's skies with the Moon in Earth's skies. b. Describe where in the sky Charon would appear as seen from various locations on Pluto.

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