Brightness Of Sun And Stars Question Preview (ID: 62525)
Review Of Brightness Of Sun And Stars, Constellations.
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Jerome notices that two stars appear to have the same brightness. He knows that one of the stars is much farther away than the other. What could he conclude about the two stars?
a) The one that is closer must be brighter.
b) The one that is farther away must be brighter.
c) Both stars must have the exact same actual brightness.
d) Both stars must give off the exact same amount of energy.
A stars' brightness or luminosity can be explained by its...
a) size and distance from Earth
b) size and temperature
c) distance from Earth and temperature
d) color and life span
The difference in the brightness of two stars with the same surface temperature is
a) related to their ages
b) related to their sizes
c) related to their colors
d) related to how they formed
Compared to other stars, the Sun is __________ in size, brightness and temperature
a) less
b) more
c) none of these
d) average
A student learns that the sun is classified as a medium-size star and that many stars are much bigger and brighter. However, the student observes that other stars look very dim. Why do other stars look much dimmer than the sun?
a) The sun appears yellow, which is more visible than other colors.
b) The sun is much closer to Earth than other stars are.
c) Other stars are made up of different gases than the sun is.
d) As light from other stars travels through space, it gets reflected.
If you view stars in March, will the stars be in the same location in the night sky in October? Explain.
a) Rotation of Earth on its axis and revolution of Earth around sun, the stars will be in a different location/not visible.
b) Revolution of Earth on its axis and rotation of Earth around sun, stars will be in a different location/not visible.
c) The stars don't move so everything will be in the same location in the night sky.
d) Stars are constantly moving so they are never in the same location.
Observed patterns of stars that people use to mark the positions of stars in the sky
a) constellations
b) galaxies
c) suns
d) moons
Scientists use the light-year to describe the relationships between objects in space. What does a light-year measure?
a) the distance that light can travel in one year
b) the brightness of light that travels through space
c) the number of years it takes light to travel to Earth
d) the time it takes light to travel 1 million km
A light year is the ________ that light travels in one year.
a) energy
b) frequency
c) P x F = D
d) distance
Which of the following is NOT a factor that controls the apparent brightness of a star?
a) how old it is
b) how big it is
c) how hot it is
d) how far away it is
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