7.2 Earth is in the milky way galaxy

Multiple Choice

Why is it significant that Earth is located in the Milky Way Galaxy?

• Because it helps us understand our cosmic neighborhood and origins.

• Because it determines the weather on Earth.

• Because it affects Earth's gravity.

• Because it influences Earth's rotation.

Open Ended

What do you find most fascinating about the structure of the Milky Way or Earth's place within it?

Open Ended

Considering what we've covered, what do you already know about Earth's place in the universe, and how do you think scientists measure the vast distances in space?

Multiple Choice

Which of the following statements best describes a galaxy?

• A massive collection of stars, gas, dust, and dark matter held together by gravity

• A single star surrounded by planets

• A small group of planets and moons

• A cloud of gas and dust with no stars

Fill in the Blanks

The Milky Way is about

light-years across.

Multiple Select

Which of the following are true about the Milky Way galaxy?

• It is a spiral galaxy

• It contains over 100 billion stars

• It is the only galaxy in the universe

• Our solar system is located in the Orion Arm

Fill in the Blanks

Proxima Centauri, the nearest star to the Sun, is

light-years away.

Open Ended

Explain why light-years are used to measure distances in space instead of kilometers or miles.

Multiple Choice

Which elements are stars primarily made of?

• Hydrogen and helium

• Oxygen and nitrogen

• Carbon and iron

• Silicon and magnesium

Open Ended

Explain how the concept of apparent magnitude and absolute magnitude helps astronomers compare the brightness of stars.

Multiple Choice

Based on the information from the slides, what are two main factors that influence how bright a star appears from Earth?

• Distance from Earth and actual brightness

• Star's color and temperature

• Size of the star and its age

• Position in the galaxy and its speed

Multiple Select

Which of the following statements about star color and temperature are correct?

• Blue stars are the hottest.

• Red stars are cooler than blue stars.

• The Sun is a yellow star with a temperature of about 5,500°C.

• Red stars are hotter than blue stars.

Fill in the Blanks

The Hertzsprung–Russell diagram plots stars by brightness and

.

Open Ended

Describe how stellar parallax is used to measure the distance to stars and why this method is most effective for nearby stars.

Open Ended

Using the Hertzsprung-Russell (H-R) diagram, locate and describe the characteristics of our Sun, a red giant, and a white dwarf. Consider their relative brightness, temperature, and placement on the diagram.

Fill in the Blanks

What is the name of our home galaxy?

Multiple Select

Which of the following are tools astronomers use to explore and measure the universe?

• Light-years

• Star color

• Brightness

• Parallax

Multiple Choice

Which of the following statements about the Milky Way galaxy is correct?

• It is a spiral galaxy containing billions of stars.

• It is the only galaxy in the universe.

• It is smaller than most other galaxies.

• It does not contain any planets.

Multiple Choice

Which of the following methods do astronomers use to measure the distance to stars?

• Parallax

• Spectroscopy

• Radar

• Sonar

Open Ended

Reflecting on today's lesson, what is one thing you learned about the Milky Way Galaxy and Earth's place in it that surprised you or made you curious to learn more?