Physics 121- Quiz 1 and answers already passed 2025

Physics 121- Quiz 1 and answers already
passed 2025
A _____ deals with limited evidence, but serves as a starting point for further
investigation. A ____ is a well-established body of fact that explain some
aspect of nature. - correct answer ✔1. Hypothesis
2. Theory


A. __ the distance between cities in the US.
B. __ the distance between planets in our solar system.
C.__ the distance between stars in our galaxy. - correct answer ✔A: 1.
Kilometers
B: 2. Astronomical Units
C: 3. Light-Years


We are located approximately
1. at the center of the Milky Way
2. Near the center of the Milky Way
3. about 2/3 from the center of the Milky Way.
4. at the farthest outskirts of the Milky Way. - correct answer ✔3. about 2/3
from the center of the Milky Way.


Light from the Sun takes about __ to reach Earth.
1. 8 seconds
2. 8 minutes
3. 8 hours
4. 8 years - correct answer ✔2. 8 minutes.

, One of the nearest stars to the Sun is Alpha Centauri, whose distance is 4.4
light years away. How long does it take light to travel from Alpha Centauri to
Earth?
A. 1.25 seconds
B. 8.3 minutes
C. 4.4 years
D. 600 years - correct answer ✔C. 4.4 years


Which of the following is FALSE?
1. A scientific theory is a undisputed fact
2. if continual testing of a hypothesis shows it to be valid, it may become an
accepted theory.
3. A hypothesis must always have one or more testable predictions.
4. A scientific theory may eventually be proven wrong when scientists acquire
new data. - correct answer ✔1. A scientific theory is an undisputed fact.


Approximately how many meters are in 12 feet?
A. 1.3
B. 4
C. 8
D. 12 - correct answer ✔B. 4


A ___ becomes a ___ when repeated testing of its predictions does not
disprove it.
A. hypothesis; scientific method
B. theory; scientific revolution
C. phenomenon; theory