WorksheetsWeek 7: Stars, Planets, Galaxies and More- Study Guide
Total questions: 10
Worksheet time: 7mins
Why are stars considered sources of energy?
Atoms on the stars catch fire.
All atoms on stars have two protons in the nucleus.
The conversion of hydrogen to helium creates light and heat.
The sun provides energy that is reflected by other stars.
A light year is a unit of __________.
time
weight
mass
distance
How can scientists be certain that nuclear fusion is not occurring on the outer gas giants?
These planets are not rocky.
These planets do not contain enough gases to produce energy.
These planets are too large to produce energy.
These planets do not produce energy.
Research completed by Harley Shapley was most dependent upon what scientific tool?
a space probe
a telescope
a nuclear reactor
a model of the solar system
Why is the Milky Way considered a galaxy?
It contains all the planets of our solar system.
It can hold up to 1 million planet Earths.
It contains meteors, asteroids and comets, which do not need gravity.
It contains a group of about 100 billion stars and other bodies held together by gravity.
True or False:
The asteroid belt is a group of thousands of asteroids revolving around the sun, between Mars and Jupiter.
True
False.
True or False:
Shapley hypothesized that our sun was not the center of the Milky Way.
True
False.
Which star is located closest to the sun in the Milky Way Galaxy?
Proxima Centauri
Sirius
Tau Ceti
None of the stars is closest to the sun, as they are all light years away.
How many miles is Tau Ceti from Sirius?
11.89
3.31
19.86 trillion
71.34 trillion
True or False:
Space gas and dust make up the sun and it never burns out. Instead, the sun moves through the solar system on a regular schedule.
True
False.
