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About this item

1. Why is scientific notation used in science?

	a.	because it makes it easy to write very big or very small numbers
	b.	because all astronomical distances are expressed in metric units
	c.	because it makes conversions between units easy
	d.	because it makes conversions between distances easy

ANSWER:

2. What is the approximate diameter of the Earth?

	a.	1 AU
	b.	13,000 light-years
	c.	13,000 kilometres
	d.	1,000,000 kilometres

ANSWER:

3. What is the average distance from Earth to the Sun?

	a.	1 ly
	b.	1 AU
	c.	1 million km
	d.	1 billion km

ANSWER:

4. Which one of the following statements best describes a planet?

	a.	a non-luminous body
	b.	an irregular shape
	c.	a body that generates energy by nuclear fusion
	d.	a body located at the centre of the Solar System

ANSWER:

5. Which one of the following statements best describes the Sun?

	a.	generates energy by nuclear fusion
	b.	located 10 AU from Earth
	c.	orbiting the Solar System
	d.	located in the centre of the Milky Way

ANSWER:

6. What does the Solar System contain?

	a.	the Sun, its planets, and some smaller bodies
	b.	the Sun, galaxies, planets, and stars
	c.	the Sun, planets, moons, and stars
	d.	the Sun, planets, asteroids, and galaxies

ANSWER:

7. Approximately how many times larger than the diameter of a typical planet (the Earth) is the diameter of a typical star (the Sun)?

	a.	10 times
	b.	100 times
	c.	1000 times
	d.	10,000 times

ANSWER:

8. How does the radius of the Moon’s orbit compare to the radius of the Earth?

	a.	It is 0.6 times as large.
	b.	It is 6 times as large.
	c.	It is 60 times as large.
	d.	It is 600 times as large.

ANSWER:

9. Which of the following is no longer considered a major planet?

	a.	Mercury
	b.	Uranus
	c.	Pluto
	d.	Saturn

ANSWER:

10. In the diagram, what is the diameter of Mercury?

	a.	about 240 km
	b.	about 2400 km
	c.	about 24,000 km
	d.	about 240,000 km

ANSWER:

11. If the distance from the Sun to the Earth is represented by roughly 15 metres, then what would the distance from the Earth to the Moon on the same scale be?

	a.	about 30 metres
	b.	about 10 metres
	c.	about 1 metre
	d.	smaller than the width of your hand

ANSWER:

12. Earth has a radius of about 6400 km, the Sun has a radius of about 7.0×10⁵ km, and a rubber ball has a radius of 6.4 cm. If you were to construct a scale model of the Solar System using the rubber ball to represent Earth, what is the radius of a ball needed to represent the Sun in your model?

	a.	7.0 × 10⁵ cm
	b.	7.0 cm
	c.	700 cm
	d.	70 cm

ANSWER:

About this item

1. Why is scientific notation used in science?

	a.	because it makes it easy to write very big or very small numbers
	b.	because all astronomical distances are expressed in metric units
	c.	because it makes conversions between units easy
	d.	because it makes conversions between distances easy

ANSWER:

2. What is the approximate diameter of the Earth?

	a.	1 AU
	b.	13,000 light-years
	c.	13,000 kilometres
	d.	1,000,000 kilometres

ANSWER:

3. What is the average distance from Earth to the Sun?

	a.	1 ly
	b.	1 AU
	c.	1 million km
	d.	1 billion km

ANSWER:

4. Which one of the following statements best describes a planet?

	a.	a non-luminous body
	b.	an irregular shape
	c.	a body that generates energy by nuclear fusion
	d.	a body located at the centre of the Solar System

ANSWER:

5. Which one of the following statements best describes the Sun?

	a.	generates energy by nuclear fusion
	b.	located 10 AU from Earth
	c.	orbiting the Solar System
	d.	located in the centre of the Milky Way

ANSWER:

6. What does the Solar System contain?

	a.	the Sun, its planets, and some smaller bodies
	b.	the Sun, galaxies, planets, and stars
	c.	the Sun, planets, moons, and stars
	d.	the Sun, planets, asteroids, and galaxies

ANSWER:

7. Approximately how many times larger than the diameter of a typical planet (the Earth) is the diameter of a typical star (the Sun)?

	a.	10 times
	b.	100 times
	c.	1000 times
	d.	10,000 times

ANSWER:

8. How does the radius of the Moon’s orbit compare to the radius of the Earth?

	a.	It is 0.6 times as large.
	b.	It is 6 times as large.
	c.	It is 60 times as large.
	d.	It is 600 times as large.

ANSWER:

9. Which of the following is no longer considered a major planet?

	a.	Mercury
	b.	Uranus
	c.	Pluto
	d.	Saturn

ANSWER:

10. In the diagram, what is the diameter of Mercury?

	a.	about 240 km
	b.	about 2400 km
	c.	about 24,000 km
	d.	about 240,000 km

ANSWER:

11. If the distance from the Sun to the Earth is represented by roughly 15 metres, then what would the distance from the Earth to the Moon on the same scale be?

	a.	about 30 metres
	b.	about 10 metres
	c.	about 1 metre
	d.	smaller than the width of your hand

ANSWER:

	a.	7.0 × 10⁵ cm
	b.	7.0 cm
	c.	700 cm
	d.	70 cm

ANSWER:

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About this item

1. Why is scientific notation used in science?

	a.	because it makes it easy to write very big or very small numbers
	b.	because all astronomical distances are expressed in metric units
	c.	because it makes conversions between units easy
	d.	because it makes conversions between distances easy

ANSWER:

2. What is the approximate diameter of the Earth?

	a.	1 AU
	b.	13,000 light-years
	c.	13,000 kilometres
	d.	1,000,000 kilometres

ANSWER:

3. What is the average distance from Earth to the Sun?

	a.	1 ly
	b.	1 AU
	c.	1 million km
	d.	1 billion km

ANSWER:

4. Which one of the following statements best describes a planet?

	a.	a non-luminous body
	b.	an irregular shape
	c.	a body that generates energy by nuclear fusion
	d.	a body located at the centre of the Solar System

ANSWER:

5. Which one of the following statements best describes the Sun?

	a.	generates energy by nuclear fusion
	b.	located 10 AU from Earth
	c.	orbiting the Solar System
	d.	located in the centre of the Milky Way

ANSWER:

6. What does the Solar System contain?

	a.	the Sun, its planets, and some smaller bodies
	b.	the Sun, galaxies, planets, and stars
	c.	the Sun, planets, moons, and stars
	d.	the Sun, planets, asteroids, and galaxies

ANSWER:

7. Approximately how many times larger than the diameter of a typical planet (the Earth) is the diameter of a typical star (the Sun)?

	a.	10 times
	b.	100 times
	c.	1000 times
	d.	10,000 times

ANSWER:

8. How does the radius of the Moon’s orbit compare to the radius of the Earth?

	a.	It is 0.6 times as large.
	b.	It is 6 times as large.
	c.	It is 60 times as large.
	d.	It is 600 times as large.

ANSWER:

9. Which of the following is no longer considered a major planet?

	a.	Mercury
	b.	Uranus
	c.	Pluto
	d.	Saturn

ANSWER:

10. In the diagram, what is the diameter of Mercury?

	a.	about 240 km
	b.	about 2400 km
	c.	about 24,000 km
	d.	about 240,000 km

ANSWER:

11. If the distance from the Sun to the Earth is represented by roughly 15 metres, then what would the distance from the Earth to the Moon on the same scale be?

	a.	about 30 metres
	b.	about 10 metres
	c.	about 1 metre
	d.	smaller than the width of your hand

ANSWER:

	a.	7.0 × 10⁵ cm
	b.	7.0 cm
	c.	700 cm
	d.	70 cm

ANSWER:

About this item

1. Why is scientific notation used in science?

	a.	because it makes it easy to write very big or very small numbers
	b.	because all astronomical distances are expressed in metric units
	c.	because it makes conversions between units easy
	d.	because it makes conversions between distances easy

ANSWER:

2. What is the approximate diameter of the Earth?

	a.	1 AU
	b.	13,000 light-years
	c.	13,000 kilometres
	d.	1,000,000 kilometres

ANSWER:

3. What is the average distance from Earth to the Sun?

	a.	1 ly
	b.	1 AU
	c.	1 million km
	d.	1 billion km

ANSWER:

4. Which one of the following statements best describes a planet?

	a.	a non-luminous body
	b.	an irregular shape
	c.	a body that generates energy by nuclear fusion
	d.	a body located at the centre of the Solar System

ANSWER:

5. Which one of the following statements best describes the Sun?

	a.	generates energy by nuclear fusion
	b.	located 10 AU from Earth
	c.	orbiting the Solar System
	d.	located in the centre of the Milky Way

ANSWER:

6. What does the Solar System contain?

	a.	the Sun, its planets, and some smaller bodies
	b.	the Sun, galaxies, planets, and stars
	c.	the Sun, planets, moons, and stars
	d.	the Sun, planets, asteroids, and galaxies

ANSWER:

7. Approximately how many times larger than the diameter of a typical planet (the Earth) is the diameter of a typical star (the Sun)?

	a.	10 times
	b.	100 times
	c.	1000 times
	d.	10,000 times

ANSWER:

8. How does the radius of the Moon’s orbit compare to the radius of the Earth?

	a.	It is 0.6 times as large.
	b.	It is 6 times as large.
	c.	It is 60 times as large.
	d.	It is 600 times as large.

ANSWER:

9. Which of the following is no longer considered a major planet?

	a.	Mercury
	b.	Uranus
	c.	Pluto
	d.	Saturn

ANSWER:

10. In the diagram, what is the diameter of Mercury?

	a.	about 240 km
	b.	about 2400 km
	c.	about 24,000 km
	d.	about 240,000 km

ANSWER:

11. If the distance from the Sun to the Earth is represented by roughly 15 metres, then what would the distance from the Earth to the Moon on the same scale be?

	a.	about 30 metres
	b.	about 10 metres
	c.	about 1 metre
	d.	smaller than the width of your hand

ANSWER:

	a.	7.0 × 10⁵ cm
	b.	7.0 cm
	c.	700 cm
	d.	70 cm

ANSWER:

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