CER Worksheet: Why Does the Sun Look Bigger and
Brighter?
Directions: Complete the CER by filling in the blanks. Use your lab results and the text to
help you.
Fill-in-the-Blank CER (WITH Word Bank)
Word Bank: Sun • closer • brighter • distance • bigger • flashlight • medium-sized •
Alpha Centauri A • farther away • appears • stars • brightness
The __________ looks bigger and brighter than other stars because it is much __________
to Earth than any other star. In our lab, the paper circle looked __________ when we
stood close and smaller when we moved __________, showing that distance changes
how big something __________. We also saw that a __________ looked __________ at 1 meter
and dimmer at 3 meters. A smaller circle even looked bigger than a larger one when
it was closer. According to the text, the Sun is a __________ star, and __________ is
actually bigger than the Sun. Many other __________ are larger or brighter, but they
look small because they are so far away. A star’s apparent __________ depends on how
bright it really is and how far away it is.
Fill-in-the-Blank CER (NO Word Bank)
The __________________ looks bigger and brighter than other stars because it is much
__________________ to Earth than any other star. In our lab, the paper circle looked
__________________ when we stood close and smaller when we moved __________________,
showing that distance changes how big something __________________. We also saw that
a __________________ looked __________________ at 1 meter and dimmer at 3 meters. A
smaller circle even looked bigger than a larger one when it was closer. According to
the text, the Sun is a __________________ star, and __________________ is actually bigger than
the Sun. Many other __________________ are larger or brighter, but they look small
because they are so far away. A star’s apparent __________________ depends on how
bright it really is and how far away it is.