Physical Science: Chapters 3-4 Test
What is the engineering cycle?
Ask a question, collect evidence, propose an answer, compare evidence, ask a better question
What are the steps of the scientific method?
Ask a question, gather data, form hypothesis, test hypothesis, analyze data, form conclusion
How fast will an object speed up each second while falling?
9.8 m/second squared
What is proceedure?
A collection of experimental techniques
What is a variable?
A factor that affects an experiment
What are scientific theories?
A human attempt to explain natural laws
What is the scientific method?
A process of testing the hypothesis to confirm or disprove it
What are natural laws?
A set of rules the universe follows
What is the rate at which velocity changes?
Acceleration
What is the formula for acceleration?
Acceleration = final velocity - start velocity/final time - start time
What is technology?
Application of science for human needs
What is an object accelerating under the force of gravity in?
Free fall
What is a experimental technique?
How you do the experiment
How do ethics affect scientific research?
If you put what actually happens or what supports your hypothesis
What happens once a scientific theory has been accepted?
It continues to be tested against new evidence
What is the process of inquiry?
Learning by asking questions and seeking the answers
If there is a constant speed, is there any acceleration?
No
What does scientific evidence have to be?
Objective and repeatable
What is the relationship between a slope for a position vs time graph and a speed vs time graph?
The slope is the value of the speed vs time graph
Where is the place where position equals zero?
Origin
What are engineers?
People who make technology
What is given relative to an object's origin?
Position
What is an object moving in a curved path and affected only by gravity?
Projectile
What is a control variable?
The variable that stays the same in an experiment
What is an experimental variable?
The variable you change in an experiment
What is the formula for slope?
Rise over run
How do scientists communicate their findings?
Scientific journal
How is science and engineering different?
Scientists learn how nature works while engineers use scientific knowledge to solve problems
What is the unit for acceleration?
Second squared
What is the formula for speed?
Speed = distance/time
Acceleration occurs when there is a change in what?
Speed or direction
What does a hypothesis need to be?
Testable
What does a good scientific experiment do?
Tests the hypothesis
Why are prototypes designed by engineers?
To test a design and see if it works
What is average speed?
Total distance divided by total time
How is vector described?
Using a number and direction
What is a variable that tells you direction and amount?
Vector
What is speed with direction?
Velocity
What axis is the independent variable on?
X axis
What axis is the dependent variable on?
Y axis