7th Grade Science

eDay Lesson Number 3

Data Tables and Graphs

Mrs. Beeghly

Mrs. Borucki

You will need to print this lesson and complete on the paper.

This assignment must be tuned in to your science teacher within two weeks of returning to school. This assignment will be graded as a homework assignment. Your science teacher will be available for questions about this assignment for the first three days upon returning to school from 7:10 am until 7:25 am. Students can also email teachers with questions on the given eDay. Consideration will be given for students who do NOT have internet access from home. Students will receive the lesson or a comparable lesson upon return.

Name______Date ______Period______

eDay Lesson Number 3.

Data Tables and Graphs

You need to print this lesson and complete on the paper.

Learning Targets: I can…

  • Use graphs, tables and charts to study relationships between variables.
  • Construct data tables to display information collected during an investigation.
  • Identify and use three types of graphs.

Read the graph about deer populations in Ohio. Summarize the data by following the directions below:

Using the title and the axis labels as a guide, complete the sentence below to describe what the data shows.

The graph provides information about ______

during the years ______to ______.

Data Tables:

A data table is useful for organization, recording, and presenting scientific data. Typically, the first column of a data table contains the independent variable, and additional columns are filled in with the experimental observations. Often, data collected from an experiment are transferred from the data table to a graph. In some cases, a better representation of the data is to simply leave the information in a table.

  1. In the space below organize the following information about electrons, protons and neutrons in a data table. .

Electrons: relative mass = 1; relative change = -1– this one is done for you as an example

Protons: relative mass = 2000; relative change = +1

Neutrons: relative mass = 2000; relative change = 0

Parts of an Atom / Relative Mass / Relative Change
Electron / 1 / -1
  1. In the space below organize the following information about four mineral samples in a data table.

Sample E: density = 3.7g/cm3; hardness = 8.5 on the Mohs scale; is not magnetic- this one is done for you as an example

Sample F: density = 5.2 g/cm3; hardness = 5.5 on the Mohs scale; is magnetic

Sample G: density = 2.7 g/cm3; hardness = 7.0 on the Mohs scale: is not magnetic

Sample H: density = 2.7 g/cm3; hardness = 3.0 on the Mohs scale; is not magnetic

Mineral Samples / Density (g/cm3) / Hardness on Mohs Scale / Magnetic?
Yes or No
E / 3.7 / 8.5 / no

Bar Graph:

A bar graph is a type of graph in which the lengths of the bars are used to represent and compare data. A numerical scale is used to determine the lengths of the bars. It is important to note that the scale used on the y-axis can show any type of numerical value. Bar graphs are useful for displaying data collected from distinct experimental conditions or from distinct time points during an experiment.

  1. Use a bar graph to show the acceleration of blocks of ice across a smooth, flat surface.

ACCELERATION OF ICE
Block / Mass (kg) / Acceleration (m/s2)
1 / 1.0 / 4.0
2 / 2.0 / 2.0
3 / 3.0 / 1.3

Title: ______

Acceleration

(m/s2)

Block 1 Block 2 Block 3

1 kg 2 kg 3 kg

Blocks of Ice with Mass in kg

  1. Create a double bar graph to compare the respiration rates of smokers and nonsmokers during different physical activities.

RESPIRATION RATE
Activity / Smokers / Nonsmokers
At rest / 22 / 15
Walking / 26 / 23
Running / 36 / 33

Title: ______

Bar Key:

Smokers

Respiration Rate

Nonsmokers

At Rest Walking Running

Activities

Help hint: You will need two bars for each activity. Use the key to color code your bar. If you don’t have colors, you make one bar solid and one striped.

Line Graph:

A line graph is a type of graph in which a line represents a continuous relationship between an independents variable and dependent variable. Often, a line graph is used to demonstrate a change in a variable over time. Line graphs are useful for displaying data collected form experimental conditions or from time points that are linked. It is important to note that the greater the distance between points on the x-axis, the greater is the probability that a straight line does not actually connect the data points.

  1. Use a line graph to show the amount of ragweed in the air during a six-week period.

WEEKLY POLLEN COUNTS
Week / Ragweed (gains/m3)
1 / 10
2 / 250
3 / 130
4 / 240
5 / 140
6 / 25

Title: ______

Ragweed Pollen

(gains/m3)

0 1 2 3 45 6

Weeks

  1. Use a double line graph to compare the amounts of two pollutants in the air between 1950-1990.

POLLUTION LEVELS
Year / Pollutant 1
(millions of tons) / Pollutant 2
(millions of tons)
1950 / 22 / 10
1960 / 20 / 15
1970 / 30 / 20
1980 / 25 / 25
1990 / 20 / 27

Title: ______

Line Key:

PollutantPollutant 1

Levels

(millionsof tons)Pollutant 2

0 1950 1960 1970 1980 1990

Year

Circle graph:

A circle graph is a type of graph in which the sizes of sectors (sections) of a circle are used to represent and compare data. It is important to note that it is only appropriate to use a circle graph when the data from the experiment are in the form of a percentage; 100 percent is represented by the entire 360˚ of the circle.

  1. Use a circle graph to compare the proportion of sedimentary rock in Earth’s crust.

Rock in Earth’s Crust
Type / Percentage
Sedimentary / 5%
Igneous and Metamorphic / 95%

Title: ______

Helpful Hint: The whole circle represents 100% of all the rock in Earth’s crust. You must show that 95% of the crust is Igneous and Metamorphic rock and that only 5% of the crust is Sedimentary rock. Divide the circle into two parts to show this. You might need to divide it into more parts first and then add parts together to know how much of the circle is 95%.