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- 1. Multiple Choice
Which of these has the most impact on the apparent brightness of a star seen from Earth?
gravitational pull
temperature of a star
distance from Earthf
Earth's orbital pattern
- 2. Multiple Choice
The picture shows us how the Sun's rays strike Earth. Because of the Earth's tilt on its axis, some parts of Earth are having summer, and others, winter. What letter or letts on the Earth are experiencing winter?
A
A and B
D
A and D
- 3. Multiple Choice
We know that Earth makes a complete revolution around the sun once every 365 days, following an elliptical orbit. This means that the distance between the Earth and Sun, which is 93 million miles on average, changes throughout the year. We also know that the seasons are caused by the fact that the Earth is tilted on its axis by 23.5o. This tilt in Earth's axis does not change during the year.
Check the image of the Earth's orbit around the Sun. Imagine you live at the place marked by the red spot, in the United States and in the northern hemisphere. Find the label in the diagram that says "winter solstice". Compare the day length and the time the sun is in the sky with the "summer solstice". Provide an explanation for your answer.
The day length is shorter because the Northern Hemisphere is tilted away from the sun.
The day length is shorter because the Earth is at its farthest point in the orbit around the sun.
The amount of sunlight during the year does not change; the angle of the sun in the sky changes so the light seems dimmer.
The day length for both the winter and summer solstice is the same because the Earth is at about the same distance from the sun.
- 4. Multiple Choice
What would happen if you went outside one night and recorded the location of the moon? Then, on the next night, at the exact same time you went out on the first night, you go outside again. The stars will be in almost the same part of the sky as they were the first night. But the moon will be in a different place! Why?
The Earth is spinning on its axis in space.
The Earth orbits the Sun and spins on its axis.
The moon is spinning on its axis as is the Earth.
The moon is moving in a month-long orbit around Earth.
- 5. Multiple Choice
Sean goes outside and notices that the sun looks larger than the other stars he has seen. Why does the sun appear larger than the other stars?
The Sun is the largest star in the sky.
The Sun looks larger because of the rotation of the Earth.
The Sun looks larger because it is closer to Earth than any other star.
The Sun appears to be the largest star because it gives off the most light.
- 6. Multiple Choice
Why does the Sun appear larger and brighter as seen from Earth than the other stars in the chart? Use the table to help you answer the question.
It is hotter
It is larger
It is closer
It is yellow
- 7. Multiple Choice
The Northern and Southern Hemispheres experience opposite seasons and different day lengths, no matter what time of year. What is the best explanation for these variations in seasons and daylight?
The Moon orbits in a path around the hemisphere not facing the Sun.
The hemisphere experiencing winter is the farthest away from the Sun.
Earth's axial tilt changes direction as it orbits the Sun, causing seasonal patterns.
Earth's axial tilt causes one side of Earth to be exposed to the Sun than the other.
- 8. Multiple Choice
Scientists group stars by color and
alike and different
temperature
brightness
- 9. Multiple Choice
The smallest, coolest stars are
blue giant stars
red dwarf stars
- 10. Multiple Choice
The brightest stars are
red dwarf stars
blue giant stars
- 11. Multiple Choice
Our Sun is a ________ star.
red dwarf star
blue giant star
medium-sized yellow star
- 12. Multiple Choice
When a blue star dies it becomes a
blue giant
red dwarf
supernova
- 13. Multiple Choice
There are an estimated 200-400 billion stars in our galaxy, and possibly 100 billion galaxies in our universe. Why does the sun appear to be the largest object in the sky?
The Sun is the closest star to Earth.
The Sun is the biggest star in the universe.
The Sun's light is brighter than any other in the universe.
The Sun just appears large due to the bending of light rays in the atmosphere.
- 14. Multiple Choice
What causes the change within every twenty-four hours from day to night on Earth?
Earth's rotation on its axis
the tilt of Earth on its axis
Earth's revolution around the Sun
the distance from Earth to the Sun
- 15. Multiple Choice
The Earth is constantly spinning on its axis from the west towards the east. It is this spinning of the Earth that makes it appear that
the days get longer in the winter and shorter in the summer
the days get longer in the summer and shorter in the winter
the sun rises in the west and goes down in the east
the sun rises in the east and goes down in the west
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