Download Astronomy Preview Name: Worksheet 1 Block: Match the definitio

Astronomy
Preview
Name: ________________________________
Worksheet 1
Block: ________________________________
Match the definition to the correct word or term
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1. Astronomical unit
A. The force generated by electric charges
B. Matter that emits no detectable radiation but whose presence can
be deduced by its gravitational attraction on other bodies
C. A subatomic particle of nearly the same mass as the proton but
with no electric charge
D. A body in orbit around a star that is large enough to have taken on
a round shape
E. The force of attraction that is between two bodies and is generated
by their masses
F. A shorthand way to write numbers using ten to the power
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2. Atom
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3. Big bang
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4. Dark energy
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5. Dark matter
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6. Electric charge
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7. Electric force
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8. Electron
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9. Galaxy cluster
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10. Gravity
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11. Light-year
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12. Local Group
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13. Milky Way Galaxy
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14. Neutrino
L. The core of an atom around which the electrons orbit
M. A distance unit based on the average distance of the Earth from
Sun
N. A positively charge subatomic particle
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15. Neutron
O. A unit of distance equal to the distance light travels in one year
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16. Nucleus
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17. Planet
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18. Proton
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19. Satellite
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20. Scientific method
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21. Scientific notation
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22. Solar System
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23. Star
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24. Strong force
P. The small cluster or group of several dozen galaxies to which the
Milky Way belongs
Q. A form of energy detected by its effect on the expansion of the
Universe
R. The Sun, planets, their moons, and other bodies that orbit the Sun
S. A group of galaxies held together by their mutual gravitational
attraction
T. The process of observing a phenomenon, proposing a hypothesis,
and testing the hypothesis
U. The galaxy to which the Sun belongs
V. The electrical property of objects that causes them to attract or
repel one another
W. A submicroscopic particle consisting of a nucleus and orbiting
electrons
X. The largest astronomical structure we know of
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25. Universe
Y. The force responsible for radioactive decay of atoms
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26. Virgo supercluster
Z. The force that holds protons and neutrons together in the atomic
nucleus
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27. Weak force
AA. The cluster of galaxy clusters in which the Milky Way is located
G. A body orbiting a planet
H. Tiny neutral particle with little or no mass and immense
penetrating power
I. The event that created the Universe
J. A massive, gaseous body held together by gravity and generally
emitting light
K. A low-mass, negatively charged subatomic particle
Circle the letter that corresponds to the correct answer
28. The light-year is a unit of:
a. Time
b. Distance
c. Speed
d. Weight
e. Age
29. You write your address in the order of street, town, state, and so on. Suppose you were writing your
cosmic address in a similar manner. Which of the following is the correct order?
a. Earth, Milky Way, Solar System, Local Group
b. Earth, Solar System, Local Group, Milky Way
c. Earth, Solar System, Milky Way, Local Group
d. Solar System, Earth, Local Group, Milky Way
e. Solar System, Local Group, Milky Way, Earth
30. Which of the following astronomical system is/are held together by gravity?
a. The Sun
b. The Solar System
c. The Milky Way
d. The Local Group
e. All of the above
31. From the lower part of figure P.3, about how much larger is Jupiter’s diameter than Earth’s?
a. 2 times
b. 5 times
c. 10 times
d. 25 times
e. 100 times
32. Which of the following statements can be tested for correctness using the scientific method?
a. The Sun’s diameter is about 100 times larger than the Earth’s diameter.
b. The sky is sometimes blue
c. An astronaut cannot survive on the Moon without life-support systems.
d. The Moon is an uglier place than the Earth.
e. All of the above except (d).
Answer the following questions
33. How big is an astronomical unit?
34. How is a light-year defined, and what is the value of 1 light-year?
35. What particles make up an atom? Where in the atom is each particle found?