Unit 1 Chapter 1 Test 5.6 Review

1) Liam and Ava are having a fun debate about Earth. Liam says Earth is both small and large. Is Liam correct or incorrect?

• No! The Earth is big!

• Yes! The Earth is both big and small!

• No! The Earth is small!

Answer explanation

Liam is correct because the Earth can be considered both big in the context of the universe and small when compared to other celestial bodies. Thus, it is accurate to say that the Earth is both big and small!

2) Samuel and Lily are having a debate: Does the sun have the largest diameter and is it the biggest star in the universe?

• True

• False

Answer explanation

The sun does not have the largest diameter nor is it the biggest star in the universe. There are much larger stars, such as UY Scuti and VY Canis Majoris, making the statement false.

3) Arjun and Mason are having a debate! Which star listed in the table is the only star in our solar system?

• Sun

• Proxima Centauri

• Sirius

• Polaris

• Deneb

Answer explanation

The only star in our solar system is the Sun. The other options, Proxima Centauri, Sirius, Polaris, and Deneb, are all stars located outside of our solar system.

4) Imagine you're in Paris with Kai and Abigail, and you're trying to take a fun photo with the Eiffel Tower, which is 1,063 feet tall. How is it possible that the picture makes it look like you're holding the tower in your hand?

• The Eiffel Tower is far away from the person.

• The Eiffel Tower is close to the person.

• The Eiffel Tower is very small in person.

• All of the above

Answer explanation

The correct choice is that the Eiffel Tower is far away from the person. This perspective creates an optical illusion, making it appear as if they are holding the tower, despite its actual height.

5) People in the past believed Earth was surrounded by a dome with stars stuck to it in all directions. These stars were all the same distance from Earth. What was CORRECT about their beliefs?

• The stars are in all directions

• All the stars were the same distance from Earth

• Stars were stuck in a dome

Answer explanation

The correct belief is that the stars are in all directions. While the idea of stars being the same distance and stuck in a dome is incorrect, the observation of stars being visible from all angles is accurate.

6) People in the past believed Earth was surrounded by a dome with stars stuck to it in all directions. These stars were all the same distance from Earth. What was INCORRECT about their beliefs?

• The stars are not in all directions

• The stars are not all the same distance from the earth

• The stars are not in a dome surrounding the earth

Answer explanation

The belief that stars are all the same distance from Earth is incorrect, as they vary greatly in distance. Additionally, the idea of a dome surrounding Earth is also false, as stars exist in three-dimensional space.

7) Abigail and Jackson are stargazing. Abigail says, "The sun is a smaller star than Sirius, but it looks bigger to us. Why do you think that is, Jackson?"

• the sun is farther away from Earth than Sirius

• the sun is closer to Earth than Sirius

Answer explanation

The sun appears larger than Sirius because it is much closer to Earth. Despite being a smaller star, its proximity makes it look bigger in the sky compared to more distant stars like Sirius.

8) Imagine you're an astronaut like Rohan, floating in space. What is that massive object up there that shines brightly and keeps you warm?

• an astronomer

• a star

• the solar system

• Earth

Answer explanation

The massive object that shines brightly and keeps you warm in space is a star, specifically our Sun. It provides light and heat, essential for life on Earth, making it the correct answer.

Ethan and Emma are on a cosmic adventure! What includes the sun, the planets that orbit the sun, and other objects that orbit the sun?

• an astronomer

• a star

• the solar system

• the sun

Answer explanation

The solar system includes the sun, the planets that orbit it, and other celestial objects. Therefore, the correct answer is 'the solar system', as it encompasses all these elements in the cosmic adventure.

Imagine you're on a cosmic adventure with Scarlett and Mia! Who would you call to help you explore the wonders of the solar system?

• an astronmer

• a star

• an archeologist

• the sun

Answer explanation

To explore the solar system, an astronomer is the best choice as they study celestial bodies and phenomena. An archeologist focuses on human history, while a star and the sun are not capable of providing guidance.