Hierarchy of the Universe Quiz

Submit

2. A _______ is composed of gas that is so massive and dense that it has achieved nuclear fusion.

A star is composed of gas that is so massive and dense that it has achieved nuclear fusion. The fusion of hydrogen atoms in the core of a star releases an enormous amount of energy, causing the star to emit light and heat. The sun, which is the closest star to Earth, is also composed of gas and undergoes nuclear fusion in its core, generating energy that sustains life on our planet.

Explanation

A star is composed of gas that is so massive and dense that it has achieved nuclear fusion. The fusion of hydrogen atoms in the core of a star releases an enormous amount of energy, causing the star to emit light and heat. The sun, which is the closest star to Earth, is also composed of gas and undergoes nuclear fusion in its core, generating energy that sustains life on our planet.

Submit

3. Match up the cosmic objects by size. 1 is the biggest, 6 is the smallest.

1 (Biggest)

2

3

4

5

6 (smallest)

Submit

4. This is the unit of measurement used to describe the distances between objects in the universe, like the distance between one galaxy and another.

Lightyear

Astronomical Unit

Light Minute

Kilometers

The correct answer is Astronomical Unit. An Astronomical Unit (AU) is a unit of measurement used in astronomy to describe the distances between objects in the universe. It is defined as the average distance between the Earth and the Sun, which is approximately 93 million miles or 150 million kilometers. It is commonly used to measure distances within our solar system, such as the distance between planets, and is especially useful for measuring the vast distances between celestial objects like galaxies.

Explanation

The correct answer is Astronomical Unit. An Astronomical Unit (AU) is a unit of measurement used in astronomy to describe the distances between objects in the universe. It is defined as the average distance between the Earth and the Sun, which is approximately 93 million miles or 150 million kilometers. It is commonly used to measure distances within our solar system, such as the distance between planets, and is especially useful for measuring the vast distances between celestial objects like galaxies.

5. Choose all the items that can be found in a solar system.

Galaxies

Planets

Dust

Black Holes

Moons

Asteroids

Meteors

The universe

Star(s)

The items that can be found in a solar system are planets, dust, moons, asteroids, meteors, and star(s). Galaxies and black holes are not part of a solar system, as they are much larger structures that contain multiple solar systems. The universe is also not part of a solar system, as it refers to the entirety of space and all its contents.

Explanation

The items that can be found in a solar system are planets, dust, moons, asteroids, meteors, and star(s). Galaxies and black holes are not part of a solar system, as they are much larger structures that contain multiple solar systems. The universe is also not part of a solar system, as it refers to the entirety of space and all its contents.

Submit

Hierarchy Of The Universe Quiz