Chapter 7 Review

Nora and Avery are having a fun debate about space! Can you help them out? A light-year is...

• 365 days of cosmic adventures.

• the distance light travels in a year, zooming through the universe.

• the distance from Earth to Proxima Centauri, our stellar neighbor.

• the amount of light the sun produces in a year, shining bright.

Imagine you're an astronaut like Aria, floating through the cosmos. What is that giant ball of hot gases, shining brightly and undergoing nuclear fusion, that you see in the distance?

• a planet

• a star

• a star cluster

• a solar system

Imagine you're a detective like Harper, and you discover a magical prism. What do you call the beautiful range of colors that appear when white light passes through it?

• lens.

• photograph.

• spectrum.

• ray.

Tags

NGSS.MS-PS4-2

Imagine you're an interstellar detective like Aiden, tasked with classifying stars in the galaxy. Which characteristics would you use?

• Distance, size, and color.

• Size, distance, and brightness.

• Color, brightness, and distance.

• Size, brightness, and temperature.

Imagine Charlotte and Harper are exploring the universe with their telescope. They come across the Hertzsprung-Russell diagram and notice something fascinating about main-sequence stars. Can you help them figure out what it is?

• They are mostly hot and dim.

• They are mostly cool and bright.

• They increase in brightness as they increase in temperature.

• They decrease in brightness as they increase in temperature.

Imagine you're an intergalactic explorer like Ava, Grace, or Harper! As you journey through the cosmos, you encounter two types of galaxies. Can you identify the major difference between elliptical galaxies and spiral galaxies?

• Elliptical galaxies have almost no gas or dust between the stars.

• Elliptical galaxies vary more in shape than spiral galaxies.

• Spiral galaxies have almost no gas or dust between the stars.

• Spiral galaxies contain only old stars.

Imagine you're an interstellar detective like James, searching for clues of planets around distant stars. One intriguing hint that a planet might be lurking nearby is when

• the star varies in temperature.

• the star has a very slight back and forth motion.

• the star has very strong gravity.

• radio wave activity increases near the star.

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

NGSS.MS-PS2-5

Imagine you're on a cosmic adventure with Noah and Mia, exploring the universe! According to Hubble’s law, the farther away a galaxy is from your spaceship,

• the faster it is moving toward us.

• the slower it is moving toward us.

• the slower it is moving away from us.

• the faster it is moving away from us.

Tags

NGSS.HS-ESS1-2

Imagine you're on a magical journey with Arjun, Samuel, and Hannah, exploring the wonders of the universe. Suddenly, you discover a type of light that humans can see. What is this mystical light called? ____________________ light.

• visible
• gamma
• ultraviolet
• infrared

Imagine you're an astronomer like Avery, peering through a telescope to explore the universe. What form of ____________________ radiation are you collecting and focusing to uncover the mysteries of the cosmos?

• infrared

• electromagnetic

• ultraviolet

• x-ray

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3