Physical Science: Chapters 3-4 Test

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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


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