# Renewable Energy

## CONTENTS OF CURRICULUM UNIT 10.04.08

## Exploring Renewable Energy through Graphs and Statistics

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## Vocabulary

Population- the entire group being studied

Sample- part of the population being studied

Biased sample- bad representation of the population

Random sample- Every member of the population has an equal chance of being chosen

Systematic sample- A sampling method in which the members of the sample are chosen by a rule or formula

Stratified sample- A sampling method in which the members of the sample are chosen at random from randomly chosen subgroups

Mean- The sum of the values, divided by the number of values

Median- if an odd number of values: the middle number, if an even number of values: the average of the two middle values

Mode- the value or values that occur most often

Outlier- an extreme value

Bar Graph- a good way to display data that can be grouped in categories

Frequency table- a way to organize data if the data are given in the form of a list

Histogram- a type of bar graph where the bars represent intervals in which the data are grouped

Line graph- often used to show trends or to make estimates for values between data points

Scatter plot- shows relationships between two sets of data

Correlation- describes the type of relationship between two data sets

Line of best fit- line that comes closest to all the points on a scatter plot

Btu- British thermal unit

kWh- kilowatt-hours

Electricity- a fundamental form of energy observable in positive and negative forms that occurs naturally (as in lightning) or is produced (as in a generator) and that is expressed in terms of the movement and interaction of electrons

Fossil Fuels- a fuel (as coal, oil, or natural gas) formed in the earth from plant or animal remains

Hydroelectric power- of or relating to production of electricity by waterpower

Solar power- radiation from the sun capable of producing heat, causing chemical reactions, or generating electricity

Geothermal power- of, relating to, or utilizing the heat of the earth's interior; produced or permeated by such heat

Wind Power- form of energy conversion in which turbines convert the kinetic energy of wind into mechanical or electrical energy that can be used for power