Midterm Recap

How many significant figures are in: 6.70

• 1

• 2

• 3

• 0

In the lab, it is ok to (check off two):

• Run

• Talk

• Ask for help

• Break things

What is this number in standard notation: 7.89 x 10^-4

• 0.00789

• 0.000789

• 0.0789

• 789

A dependent variable:

• Is not influenced by other variables
• Is the variable that is being manipulated
• Is the variable that is being measured
• Is always constant

The independent variable:

• Is dependent on other variables
• Is the variable that is changed or controlled in a scientific experiment
• Is the variable that is kept the same in an experiment
• Is the outcome of an experiment

In the scientific method, in order for an experiment to be valid, it must be:

• Based on personal beliefs
• Subjective
• Repeatable
• Based on assumptions

Write this number in scientific notation: 0.00098

• 9.8 x 10^-4
• 9.8 x 10^-3
• 9.8 x 10^-5
• 9.8 x 10^-2

What is the difference between precision and accuracy?

• Precision is about consistency, while accuracy is about correctness
• Precision is about correctness, while accuracy is about consistency
• Precision and accuracy are the same
• Precision is about speed, while accuracy is about correctness

Which trigonometric function requires opposite and hypotenuse measurements to solve?

• Sine
• Cosine
• Tangent
• Cosecant

Which trigonometric function requires opposite and adjacent measurements in order to solve?

• Sine
• Cosine
• Tangent
• Cosecant