Universe Middle School

Why does the Sun seem brighter than the several billion stars that are brighter than the Sun?

• because the Sun is much closer to Earth than any other star in the Universe
• because the Sun is probably hotter than all of the other stars
• because the sun is older than the brighter stars
• because the Sun is composed of different elements than other stars

Why can't our class or other 8th grade classes from different schools see the entire shape of the Milky Way Galaxy?

• there are many more stars outside the galaxy
• the stars in the middle of the galaxy are tiny
• Earth is part of the galaxy
• the center of it is composed of a cluster of stars

Which of the following is the correct order of these components of the Universe from smallest to largest?

• planets, stars, galaxies, nebulae
• planets, stars nebulae, galaxies
• nebulae, stars, planets, galaxies
• stars, planets, nebulae, galaxies

Which of the following most accurately describes why the Earth receives more energy from the Sun than all of the other billions of stars combined?

• the sun is larger in size
• the sun is more dense
• the sun is hotter
• the sun is much closer

Which of the following compares the masses of objects in the universe correctly?

• stars have less mass than galaxies and more mass than planets
• moons have less mass than stars and more mass than planets
• galaxies have less mass than moons and more mass than planets
• planets have less mass than galaxies and more mass than stars

Which of the following correctly lists the components of the universe in order from least to greatest?

• galaxy, nebula, star, planet
• star, planet, nebula, galaxy
• planet, star, nebula, galaxy
• planet, nebula, star, galaxy

Scientists discovered by using a telescope that black holes were emitting waves with a frequency of 1.4 x 10⁹ Hz. According to the Electromagnetic Spectrum, which type of waves did the telescope they were using detect?

• Microwaves
• x-rays
• gamma rays
• visible light

Scientists discovered by using a telescope that black holes were emitting waves with a frequency of 1.4 x 10¹⁵ Hz. According to the Electromagnetic Spectrum, which type of waves did the telescope they were using detect?

• x-rays
• visible light
• ultraviolet
• gamma rays

Scientists discovered by using a telescope that black holes were emitting waves with a frequency of 1.4 x 10¹⁸ Hz. According to the Electromagnetic Spectrum, which type of waves did the telescope they were using detect?

• gamma rays
• radio 
• microwaves
• x-rays

What is important to understand when trying to determine when different objects in the universe will collide with the planets Venus and Mars?

• how the object was formed
• Mars and Venus atmospheric composition
• there is a gravitational attraction between all objects
• how magnets are attracted to one another