Barnard’s Star is about 5.9 light years from the sun. The star has an approximate temperature of 2,800 K.
Based on the diagram, what spectral class does Barnard’s Star belong to?
(1 point)
Responses
Spectral Class O
Spectral Class O
Spectral Class B
Spectral Class B
Spectral Class A
Spectral Class A
Spectral Class M
Spectral Class M
The Milky Way galaxy is described as a disk of stars orbiting a central point on the disk. Which of these best explains why people on Earth cannot see the entire shape of the Milky Way?(1 point)
Responses
Earth is a part of this galaxy.
Earth is a part of this galaxy.
Many more stars exist outside the galaxy.
Many more stars exist outside the galaxy.
The stars in the center of the galaxy are extremely small.
The stars in the center of the galaxy are extremely small.
The center of the galaxy consists of a dense cluster of stars.
Earth is a part of this galaxy.
Jessica went camping with her family and noticed a full moon on their first night of the trip. She admired how bright it was and how much it helped illuminate their campsite in addition to the campfire. What moon phase should Jessica expect when she returns home seven days later?(1 point)
Responses
first quarter
first quarter
third quarter
third quarter
waning gibbous
waning gibbous
waning crescent
waning crescent
Rio de Janeiro, a city in Brazil, hosted the 2016 Summer Olympics. Brazil is a part of South America and is located in the Southern Hemisphere. Which statement is true about the seasons of Brazil compared to the United States?(1 point)
Responses
Brazil will always have the same season as America because South America is in the Southern Hemisphere.
Brazil will always have the same season as America because South America is in the Southern Hemisphere.
Brazil will always have the same season as America because both countries experience daytime at the same time.
Brazil will always have the same season as America because both countries experience daytime at the same time.
Brazil will always have different seasons than America because it is in the Southern Hemisphere.
Brazil will always have different seasons than America because it is in the Southern Hemisphere.
Brazil will always have different seasons than America because the countries do not receive sunlight at the same time of day.
Brazil will always have different seasons than America because it is in the Southern Hemisphere.
The diagram below shows four positions in Earth’s orbit around the sun.
The Northern Hemisphere experiences the beginning of spring when Earth is in -
(1 point)
Responses
Position 1
Position 1
Position 2
Position 2
Position 3
Position 3
Position 4