PSC 1121 Midterm || Questions and 100% Accurate
Answers.
The steps of the scientific method correct answers 1. Observe - ask questions / gather info
2. Hypothesis - identify variables / explain observation / formula
3. Experiment - test predications / check reproducibility
4. Conclude - collect data / accept or deny as theory
Occam's razor correct answers If 2 different hypotheses explain the same phenomenon, the one
with fewer assumptions is the accepted hypothesis
Pseudoscience correct answers theory of creationism (not tested, not a real theory)
Scale correct answers method of estimating/measuring size and distance - compare to standard
Power of 10 correct answers scale of our universe (very large and very small numbers) helps
with precision of significant figures, we can write the number in scientific notation to make it
clear.
Example; 6370000 = 6.37 x 106
Order-of-magnitude correct answers (less than 5 = 1, greater than 5=10)
Example; 4.3279 x 106
= 4.328 x 106
= 1 x 106
Metric system (signify the power of 10) 3 base units correct answers 1. Length - meter (m)
2. Time - seconds (s)
3. Mass - kilogram (kg)
Scalar correct answers - quantities tat are fully described by magnitude (numerical value) alone
Distance "how much ground an object covered"
Speed "how fast"
Vectors correct answers described by magnitude and direction
Displacement "how far out of place an object is"
Velocity "direction of motion as well as how fast"
Magnitude - change in speed or direction
Acceleration "rate of change in velocity"
Force
Momentum
Average speed - distance traveled / time of travel correct answers S = d / t
Instantaneous speed correct answers how fast @ a given instant
Answers.
The steps of the scientific method correct answers 1. Observe - ask questions / gather info
2. Hypothesis - identify variables / explain observation / formula
3. Experiment - test predications / check reproducibility
4. Conclude - collect data / accept or deny as theory
Occam's razor correct answers If 2 different hypotheses explain the same phenomenon, the one
with fewer assumptions is the accepted hypothesis
Pseudoscience correct answers theory of creationism (not tested, not a real theory)
Scale correct answers method of estimating/measuring size and distance - compare to standard
Power of 10 correct answers scale of our universe (very large and very small numbers) helps
with precision of significant figures, we can write the number in scientific notation to make it
clear.
Example; 6370000 = 6.37 x 106
Order-of-magnitude correct answers (less than 5 = 1, greater than 5=10)
Example; 4.3279 x 106
= 4.328 x 106
= 1 x 106
Metric system (signify the power of 10) 3 base units correct answers 1. Length - meter (m)
2. Time - seconds (s)
3. Mass - kilogram (kg)
Scalar correct answers - quantities tat are fully described by magnitude (numerical value) alone
Distance "how much ground an object covered"
Speed "how fast"
Vectors correct answers described by magnitude and direction
Displacement "how far out of place an object is"
Velocity "direction of motion as well as how fast"
Magnitude - change in speed or direction
Acceleration "rate of change in velocity"
Force
Momentum
Average speed - distance traveled / time of travel correct answers S = d / t
Instantaneous speed correct answers how fast @ a given instant
