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1. The Hertzsprung-Russell diagram below shows how the brightness, surface temperature, and color of stars are related.stars would be *
3 points
Captionless Image
A Barnard’s Star is less bright than the sun, has a surface temperature below 3,800 K, and is red. *
B Barnard’s Star is less bright than the sun, has a surface temperature above 3,800K, and is red.
C Barnard’s Star is brighter than the sun, has a surface temperature below 5,300 K, and is yellow.
D Barnard’s Star is brighter than the sun, has a surface temperature above 5,300 K, and is yellow.
2. 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? *
3 points
A Earth is a part of this galaxy. *
B Many more stars exist outside the galaxy.
C The stars in the center of the galaxy are extremely small.
D The center of the galaxy consists of a dense cluster of stars.
3. 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, even through a telescope.Why do other stars look much dimmer than the sun? *
3 points
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.
4. The sun is a mid-sized, main sequence star. What stage is next in the life cycle of the sun? *
3 points
A red giant *
B black hole
C white dwarf
D neutron star
5. In November 2013 an object orbiting the sun seemed to disappear behind the sun. When a satellite did not detect the object, astronomers thought that the object had been destroyed when it passed close to the sun. However, when another satellite detected a small, bright object with a fan-shaped tail, astronomers proposed that the object was not destroyed.What type of object were astronomers most likely observing? *
3 points
A A comet *
B An asteroid
C A meteor
D A nebula
6. The universe has many different components. Which list places four components of the universe in the most likely order from smallest to largest? *
3 points
A Planets, stars, galaxies, nebulae
B Nebulae, stars, planets, galaxies
C Galaxies, stars, planets, nebulae
D Planets, stars, nebulae, galaxies *
7. The model shows the star Wolf 359, the sun, and Star X. It takes 7.8 years for light produced on Wolf 359 to reach the sun. *
3 points
Captionless Image
8 light years
39 light years
390 light years *
359 light years
8. Which of these correctly compares the masses of different objects in the universe? *
3 points
A A moon has less mass than a star and more mass than the planet it orbits.
B A planet has less mass than a galaxy and more mass than the star it orbits. *
C A galaxy has less mass than a moon and more mass than a planet.
D A star has less mass than a galaxy and more mass than a planet.
9. Darnel wants to list types of radiation based on their ability to penetrate human skin.Which list shows the order of radiation types from lowest to highest penetration? *
3 points
A Infrared radiation, microwaves, radio waves, visible light, x-rays, gamma rays, UV rays
B X-rays, gamma rays, infrared radiation, mi- crowaves, radio waves, UV rays, visible light *
C Visible light, infrared radiation, UV rays, microwaves, radio waves, x-rays, gamma rays
D Radio waves, microwaves, infrared radiation, visible light, UV rays, x-rays, gamma rays
10. Ella is learning about different types of electro- magnetic radiation. She makes the following list about one frequency of radiation:· Can damage cells of living things · Blocked by Earth’s ozone layerWhich type of radiation does Ella’s list describe? *
3 points
A Infrared
B Microwave
C Ultraviolet *
D Visible
11. To find the volume of a few small marbles, a student will need which of the following scientific tools? *
3 points
A a balance and a centimeter ruler 3.0
B a spring scale and a calculator
C a graduated cylinder and water *
D a microscope and a micron ruler
12. A student includes the following sentence in a write-up of their investigation: The lead ball has a measured mass of 113 grams. Which kind of scientific statement is this sentence? *
3 points
A inference
B prediction
C conclusion
D observation *
13. Some students measure the mass of a small pile of leaves before and after the leaves decompose. Each time the students measure the mass, they place a container with the decomposing leaves on a balance. Before recording the mass of the leaves, the students must do which of the following? *
3 points
A Subtract the mass of the container*
B Add leaves from other plants to the container
C Allow the leaves to settle in the container for a few days
D Use a metric ruler to measure the volume of the container

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  1. 1. No diagram

    2. agree

    3. agree

    4. dk

    5. agree

    6. dk

    7. dk

    8. disagree

    9. dk

    10. dk

    11. agree

    12. agree

    13. agree

    For the ones I don't know, search Google under the key words, like "Ultraviolet " to get possible sources.

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  2. 1. The Hertzsprung-Russell diagram below shows how the brightness, surface temperature, and color of stars are related.Which of these observations of Barnard’s Star is most likely accurate? *
    0/1
    Captionless Image
    A Barnard’s Star is less bright than the sun, has a surface temperature below 3,800 K, and is red.
    B Barnard’s Star is less bright than the sun, has a surface temperature above 3,800K, and is red.

    C Barnard’s Star is brighter than the sun, has a surface temperature below 5,300 K, and is yellow. D Barnard’s Star is brighter than the sun, has a surface temperature above 5,300 K, and is yellow.
    D Barnard’s Star is brighter than the sun, has a surface temperature above 5,300 K, and is yellow.

    2. 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? *
    1/1
    A Earth is a part of this galaxy.

    B Many more stars exist outside the galaxy.
    C The stars in the center of the galaxy are extremely small.
    D The center of the galaxy consists of a dense cluster of stars.

    3.The picture shows sand used to make a model of a galaxy. In the model, each grain of sand best represents: *
    1/1
    Captionless Image
    A a comet
    B a black hole
    C an asteroid
    D a star


    4. Which unit of measurement do astronomers use when measuring the distance between two stars found in the Milky Way? *
    1/1
    A meter
    B light-year

    C kilometer
    D astronomical unit

    5.The sun is a mid-sized, main sequence star. What stage is next in the life cycle of the sun? *
    1/1
    A red giant

    B blackhole
    C white dwarf
    D neutron star

    6. Why does Earth get more energy from the sun than from all the other stars in the universe combined? *
    1/1
    A The sun is much larger than the other stars.
    B The sun is much hotter than the other stars.
    C The sun is much more dense than the other stars.
    D The sun is much closer than the other stars.


    7. Astronomers study many different kinds of objects in our Solar System. Which of the following best describes a difference between comets and asteroids? *
    1/1
    A Comets orbit planets, and most asteroids orbit the Sun.
    B Comets are hot balls of gas, and asteroids are made mostly of ice.
    C Comets are made mostly of ice, and asteroids are made mostly of rocks.

    D Comets orbit the Sun between Mars and Jupiter, and asteroids form patterns in the sky.

    8. Why are light-years used to measure distances in space? *
    1/1
    A The speed of light is slower in space.
    B The speed of light is faster than time.
    C Distances in space constantly change.
    D Distances between stars are very large.


    9. In November 2013 an object orbiting the sun seemed to disappear behind the sun. When a satellite did not detect the object, astronomers thought that the object had been destroyed when it passed close to the sun. However, when another satellite detected a small, bright object with a fan-shaped tail, astronomers proposed that the object was not destroyed.What type of object were astronomers most likely observing? *
    1/1
    A Comet

    B An Asteroid
    C A meteor
    D A nebula

    10. Main sequence stars that are much larger and more massive than our Sun will become Super Giants. They will end their life cycle as *
    0/1
    A supernova
    B nebula
    C white dwarf

    D neutron star or black hole

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