Bio chapter 1

Question 1

What is a hypothesis?

Answer 1

An educated prediction on what you think will happen after the experiment.

Question 2

What are controlled variables?

Answer 2

Variables that remain the same throughout all experimental groups.

Question 3

What is an independent variable?

Answer 3

The variable that gets changed/adjusted for the experimental groups. Also known as: Cause, and X-Axis.

Question 4

What is a dependent variable?

Answer 4

The variable that is manipulated by the independent variable in an experiment. Usually on the y-axis on a graph.

Question 5

What is an experimental group?

Answer 5

The group that is exposed to the independent variable and is compared to the control group.

Question 6

What is a control group?

Answer 6

The group that is not exposed to the independent variable, and is compared to the experimental group.

Question 7

What is variance?

Answer 7

Measure the spread of a set of data points around their mean. To calculate the variance for a set of data points, subtract each data point from the average and square the value.

Question 8

What is mean?

Answer 8

This is how you find the average of a data set by adding up all the numbers and dividing it by however many numbers you have in total. This is the first step to standard deviation.

Question 9

What is standard deviation?

Answer 9

A measure that is used to judge the amount of variation in a set of data.

Question 10

What are error bars?

Answer 10

Used to present the range of the data from the average.

Question 11

What is experimental design?

Answer 11

How an experiment is created or designed. It includes a hypothesis, experiment, controlled and experimental groups, and an analysis of the data, including standard deviations.

Question 12

What is a variable?

Answer 12

Anything that can be expressed as a number and is subject to change.