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# Science

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Cards in this guide (23)
What does it take to prove a hypothesis false

It needs one counter example.
Facts.

Which state of matter is air

gas

Each value measured in nature has a number value called its magnitude and a dimension or

unit

When can the equations of kinematics not be used

Equations of kinematics or equations of motion can not be used when the body is not accelerating or is moving with a constant velocity.

A horizontal line on the velocity vs time graph indicates a constant positive acceleration

false

Which of the following is the name of the process scientists use to gain knowledge about the physical world

Scientific Method

Speed is a vector quantity

It may help to know that a vector is a specific speed in a specific direction. Example, 18kph at North Azimuth 84 degrees.

Which of the following is an example of an archery contestant showing good precision but poor accuracy

Missing the bulls-eye but hitting the same spot every time

For an archer to be precise but not accurate, they would be hitting very close to the same spot each time, but they would not hit the center of the target.
Which of the following settings describes a displacement vs time graph that looks like this

Constant velocity

Zero acceleration and/or Moving object

Is the term used to describe the study of motion

kinematics

The unit system used throughout most of the world is a metric system called the SI

true

Which of the following is not a key assumption to the scientific method

reliablilty

Distance is the magnitude of average velocity

False. Average speed is.

Fred will be four blocks from his starting place if he travels two blocks north then three blocks east and then two blocks south Is it true or false

False

Which two of the following characteristics must a hypothesis possess in order to be considered to be scientific

A hypothesis must possess capable of being proven false and testable in order to be considered to be scientific.

Are graphs representations of equations

Line graphs may represent equations, if they are defined for all values of a variable.

What do you use To change from one SI prefix to another

conversion factors

Zeros are always considered significant digits when they are to the right of the decimal point and when they are between the decimal point and another digit as in 1304

True

All digits shown on the measuring device plus one estimated digit are consider

significant digits.

for short they are called "sig. figs."

What type of description is using numbers to describe kinematic quantities

Quantitative

Blank Is a process prompted by a question.

Giving an answer is likely the process that is prompted by a question.

Scientific must be testable and capable of being proven false.

hypothesis

Which of the following phrases is the best definition of the world map

which of the following phrases is the best definition of the world map

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