Name: 
 

Astronomy Online Test



True/False
Indicate whether the statement is true or false.
 

 1. 

The outer planets are small, rocky planets with iron cores.
 

 2. 

The surface of Mars has long channels that may have been caused by flowing water.
 

 3. 

Night and day on Earth are caused by Earth's revolution around the Sun.
 

 4. 

A "shooting star," or meteor, is actually a meteoroid that burns up in Earth's atmosphere.
 

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 5. 

Small pieces of rock that enter Earth's atmosphere at speeds of 15 to 70 km/s and burn up are called ____.
a.
stars
b.
meteors
c.
meteorites
d.
asteroids
 

 6. 

The yearly orbit of Earth around the Sun is called its ____.
a.
rotation
c.
revolution
b.
ellipse
d.
tilt
 

 7. 

An artificial satellite is a spacecraft that ____.
a.
completes only one orbit
b.
is built by humans and orbits another object
c.
travels outward across the entire solar system
d.
orbits beyond the orbit of the Sun
 

 8. 

The intense magnetic fields of sunspots cause archlike eruptions called ____.
a.
solar eclipses
b.
corona
c.
photospheres
d.
prominences
 

 9. 

When the Sun, Moon, and Earth form a 90° angle, we have ____ tides.
a.
spring
b.
neap
c.
normal
d.
fall
 

 10. 

Water is found as a solid, liquid, and gas on ____.
a.
Mercury
b.
Venus
c.
Earth
d.
Mars
 

 11. 

____ are pieces of rock that strike the surface of a moon or planet.
a.
Meteoroids
b.
Comets
c.
Meteor showers
d.
Meteorites
 

 12. 

____ are patterns of stars in the sky.
a.
Galaxies
b.
Constellations
c.
Star clusters
d.
Binaries
 

 13. 

A galaxy that has a shape similar to a football is a(n) ____ galaxy.
a.
normal spiral
b.
barred spiral
c.
elliptical
d.
irregular
 

 14. 

People once believed that all planets and stars orbited around ____.
a.
Mercury
b.
Venus
c.
Earth
d.
Mars
 

 15. 

A space probe is a spacecraft that ____.
a.
completes only one orbit
b.
is built and launched by humans
c.
gathers information and sends it back to Earth
d.
both b and c
 

 16. 

The International Space Station (ISS) will be a ____ research laboratory.
a.
Russian
b.
Japanese
c.
permanent
d.
temporary
 

 17. 

Optical telescopes include ____.
a.
reflecting telescopes and refracting telescopes
b.
reflecting telescopes only
c.
refracting telescopes only
d.
radio telescopes only
 

 18. 

The spiral shape of the Milky Way Galaxy CANNOT be seen from Earth because ____.
a.
we are located above the galaxy
b.
we are located within one of its spiral arms
c.
our view is blocked by the Sun
d.
none of the above
 

 19. 

A comet develops a tail because of ____.
a.
the solar wind
c.
the Oort Cloud
b.
Earth's atmosphere
d.
Jupiter's gravitational pull
 

 20. 

A group of stars, gas, and dust held together by gravity is a ____.
a.
galaxy
b.
constellation
c.
Local Group
d.
both a and b
 

 21. 

In the Spring when the Moon, Earth, and Sun are in line, the tidal range is ____.
a.
unchanged
b.
unpredictable
c.
lowest
d.
greatest
 

 22. 

A ____ occurs when the Moon moves directly between the Sun and Earth and throws a shadow on Earth.
a.
solar eclipse
c.
waning gibbous
b.
lunar eclipse
d.
waxing gibbous
 

 23. 

____ telescopes collect and record radio waves given off by some objects in space.
a.
Radio
b.
Optical
c.
Refracting
d.
Reflecting
 

 24. 

Dark, cooler areas on the Sun's surface are called ____.
a.
sunspots
b.
solar flares
c.
coronas
d.
prominences
 

 25. 

The Sun produces energy by fusing hydrogen atoms into ____ atoms in its core.
a.
carbon
b.
helium
c.
iron
d.
oxygen
 

 26. 

Summer occurs on the hemisphere of Earth that is ____.
a.
turned away from the Sun
c.
tilted away from the Sun
b.
tilted toward the Sun
d.
turned toward the Sun
 

 27. 

The structure of a comet is considered to be like a large, ____, or a mass of frozen ice and rock.
a.
solid planet
c.
cratered moon
b.
dirty snowball
d.
none of the above
 

 28. 

In a ____ telescope, light passes through convex lenses.
a.
reflecting
b.
Hubble
c.
refracting
d.
shuttle
 

Matching
 
 
Match each term with the correct description below.
a.
sphere
f.
equinox
b.
axis
g.
winter solstice
c.
rotation
h.
Moon phases
d.
revolution
i.
waxing
e.
ellipse
j.
new Moon
 

 29. 

shape of Earth's orbit around the Sun
 

 30. 

Earth's yearly orbit around the Sun
 

 31. 

changing appearances of the Moon from Earth
 

 32. 

round, three-dimensional object and model of Earth
 

 33. 

December 21 or 22
 

 34. 

turning of Earth on its axis
 

 35. 

Moon phases in which the amount of lighted surface seen on Earth increases
 

 36. 

Moon phase in which none of the lighted surface of the Moon can be seen from Earth
 

 37. 

imaginary line extending between the poles around which Earth spins
 

 38. 

when the Sun's rays strike Earth directly at the equator
 
 
grp002-1.jpg
Figure 23-1

Match each description with the correct term below.
a.
first quarter
e.
solar eclipse
b.
full moon
f.
lunar eclipse
c.
new moon
g.
craters
d.
third quarter
h.
27.3 days
 

 39. 

waxing Moon phase in which one half of the Moon's lighted surface can be seen from Earth
 

 40. 

occurrence caused by Earth's coming between the Sun and the Moon and casting its shadow on the Moon
 

 41. 

phase in which all of the lighted side of the Moon can be seen from Earth
 

 42. 

amount of time of the Moon's revolution and rotation
 

 43. 

depressions on the Moon caused by the impact of meteorites
 

 44. 

Moon phase in which none of the lighted surface of the Moon can be seen from Earth
 

 45. 

occurrence caused by the Moon's being between the Sun and Earth and casting its shadow on Earth
 

 46. 

waning Moon phase in which one half of the lighted side of the Moon can be seen from Earth
 
 
Match each term with the correct description below.
a.
elliptical galaxy
c.
spiral galaxy
b.
light-year
d.
irregular galaxy
 

 47. 

galaxy type without a definite shape
 

 48. 

recent evidence suggests the Milky Way Galaxy may be this type
 

 49. 

largest known galaxy is this type
 

 50. 

distance measurements based on the speed of light; used for objects in space
 



 
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