How many centimeters are there in one kilometer? QUESTION How many centimeters are there in one kilometer? 100 1,000 10,000 100,000 1×106

Scientific notation is used in science because QUESTION Scientific notation is used in science because it makes it easy to write big or small numbers. all astronomical distances are expressed in metric units. it makes conversions between units easy. all of the above.

The average distance from Earth to the Sun is QUESTION The average distance from Earth to the Sun is 1 ly 1 million km 1 million miles 1 billion km 150 million km

a star which generates its own energy. 1 AU from Earth. QUESTION The sun is a star which generates its own energy. 1 AU from Earth. visible by its own light emission. all of the above.

2.9 × 107 is the same as 2.9 thousand 29 thousand 290 thousand QUESTION 2.9 × 107 is the same as 2.9 thousand 29 thousand 290 thousand 2.9 million 29 million

QUESTION Arrange the following distances in order from smallest to largest. I. kilometer II. light-year III. yard IV. Astronomical unit I, II, III, IV IV, III, II, I III, I, IV, II II, I, IV, III III, I, II, IV

QUESTION If light takes 8 minutes to travel from the sun to Earth and over 4 hours to travel from the sun to the planet Neptune, what is the distance from the sun to Neptune? 5 AU 30 AU 30 ly 5 ly 0.6 ly

In the diagram below, what is the diameter of Jupiter? QUESTION In the diagram below, what is the diameter of Jupiter? About 7.0 × 104 km. About 7.0 × 105 km. About 1.4 × 104 km. About 1.4 × 105 km. About 3.5 × 106 km.

QUESTION The speed of light is 3.0 × 105 km/sec, and it takes light 1.3 sec for light to travel from the moon to Earth. From this information, what is the distance to the moon? 390,000 km 230,000 km 3.9 km 2.3 km 4.3 × 105 km

A typical galaxy like our Milky Way galaxy contains QUESTION A typical galaxy like our Milky Way galaxy contains primarily planets. gas only. stars (some with planets), gas and dust. a single star and planets. thousands of superclusters.

contains about 100 billion stars. QUESTION The Milky Way Galaxy contains about 100 billion stars. is about 200 light-years in diameter. is the largest known object in the universe. all of the above. 1 and 3.

part of a cluster of galaxies that contains a few dozen galaxies. QUESTION The Milky Way Galaxy is a spiral galaxy. part of a cluster of galaxies that contains a few dozen galaxies. about 80,000 light years in diameter. all of the above.

QUESTION If the Earth were represented as a basketball (~10 in) and the Moon as a baseball (~3 in) then, to order of magnitude, what size would best represent the diameter of the Sun? 10 ft 100 ft 1000 ft 10000 ft

Which sequence is correct when ordered by increasing size? QUESTION Which sequence is correct when ordered by increasing size? Earth, Solar System, Milky Way Galaxy, clusters of galaxies Solar System, Earth, galaxy clusters, Milky Way Galaxy Earth, Milky Way Galaxy, Solar System, galaxy clusters Galaxy clusters, Solar System, Milky Way Galaxy, Earth

How is a planet different from a star? QUESTION How is a planet different from a star? Planets are larger than stars. Planets reflect light while stars produce their own light. Stars move faster in the sky than planets. Planets are brighter than stars.

QUESTION If the distance from the Sun to the Earth is represented by roughly 15 meters, then the distance from the Earth to the Moon on the same scale would be about 30 meters. about 10 meters. about 1 meter. small than your hand.

About the distance between New York and Boston (330 km). QUESTION Assume the size of the Sun is represented by a softball with the Earth about 15 meters (150 million km or 8 light minutes) away. Roughly how far away, to scale, would the nearest stars to the Sun be? About the distance between New York and Boston (330 km). 100 meters away. About the distance across the United States from New York to Los Angeles (4300 km). About the distance across 50 football fields (50 x 100 m).

If the distance to the nearest star is 4.2 light-years, then QUESTION If the distance to the nearest star is 4.2 light-years, then the star is 4.2 million AU away. the light we see left the star 4.2 years ago. the star must have formed 4.2 billion years ago. the star must be very young. the star must be very old.

QUESTION Assume a 100 yard football field represents the 14 billion year history of the universe with one end as the origin and the other end representing the present. The existence of human beings will extend from _____ to the present “goal line.” the 50 yard line the 5 yard line the one yard line the one inch line

Which of these is NOT a common misconception? QUESTION Which of these is NOT a common misconception? A light year is a unit of time. Stars look like disks when seen through a telescope. A galaxy is a star plus its planets. All of the above are misconceptions.

The average distance from Earth to the Sun is 1 AU. QUESTION The average distance from Earth to the Sun is 1 AU. True False

A light-year is the distance light travels in one year. QUESTION A light-year is the distance light travels in one year. True False

A kilometer contains 1 million meters. QUESTION A kilometer contains 1 million meters. True False

The Sun is a star in the Milky Way Galaxy. QUESTION The Sun is a star in the Milky Way Galaxy. True False

The metric system is a decimal system. QUESTION The metric system is a decimal system. True False

QUESTION 3.42 × 107 km is the same as 3.42 × 104 m. True False

The numbers 9.81 × 105 and 981,000 are equivalent. QUESTION The numbers 9.81 × 105 and 981,000 are equivalent. True False

A supercluster refers to a large group of stars within the Milky Way. QUESTION A supercluster refers to a large group of stars within the Milky Way. True False