Astronomy Final Exam Review -1

What is the primary component of the sun's core?

• Helium undergoing nuclear fusion.

• Hydrogen undergoing nuclear fusion.

• Carbon undergoing nuclear fusion.

• Oxygen undergoing nuclear fusion.

How did the solar system form according to scientists?

• From a rotating disk of dust and gases.

• From a series of large collisions between planets.

• From the explosion of a supernova.

• From the gravitational pull of a nearby star.

What are the main characteristics of comets?

• Comets have circular orbits and are composed of rock and metal.

• Comets have elongated orbits and are composed of ice and dust.

• Comets are always found in the asteroid belt and are made of gas.

• Comets have fixed orbits and are primarily made of liquid water.

What is the significance of the solar wind?

• It is a stream of charged particles released from the sun's corona.

• It is a type of solar energy harnessed for electricity.

• It is a phenomenon that causes solar eclipses.

• It is a measure of the sun's temperature.

What is the Oort cloud?

• A spherical shell of icy objects surrounding the solar system.

• A dense region of gas and dust in the Milky Way.

• A cluster of stars located in the Andromeda galaxy.

• A type of asteroid belt between Mars and Jupiter.

What is the difference between meteoroids, meteors, and meteorites?

• Meteoroids are small rocky bodies in space, meteors are the streaks of light they create when entering the atmosphere, and meteorites are the remnants that reach the Earth's surface.

• Meteoroids are large celestial bodies, meteors are the sound produced when they enter the atmosphere, and meteorites are the dust left behind.

• Meteoroids are the remnants of stars, meteors are the planets that collide with Earth, and meteorites are the gases released during this process.

• Meteoroids are small icy bodies, meteors are the explosions they cause in the atmosphere, and meteorites are the pieces that burn up completely.

What is a solar eclipse?

• An event where the moon passes between the Earth and the sun, blocking the sun's light.

• An event where the Earth passes between the moon and the sun, blocking the moon's light.

• An event where the sun passes between the Earth and the moon, illuminating the moon.

• An event where the moon reflects sunlight towards the Earth, creating a bright light.

What are asteroids primarily composed of?

• Rock and metal.

• Ice and gas.

• Liquid water.

• Organic compounds.

How do the diameters of terrestrial and Jovian planets compare?

• The diameters of the Jovian planets are much larger.

• The diameters of terrestrial planets are much larger.

• Both types of planets have similar diameters.

• Jovian planets have smaller diameters than terrestrial planets.

What is the role of gravity in the solar system?

• Gravity keeps planets in orbit around the sun.

• Gravity causes planets to collide with each other.

• Gravity is responsible for the formation of comets.

• Gravity has no effect on the movement of celestial bodies.