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Goldilocks and the Three Bears. 7.E.1.1 Compare the composition, properties and structure of Earth’s atmosphere to include mixtures of gases and differences in temperature and pressure within layers.

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Goldilocks and the three bears

Goldilocks and the Three Bears

7.E.1.1 Compare the composition, properties and structure of Earth’s atmosphere to include mixtures of gases and differences in temperature and pressure within layers.

Welcome Back! Greet your partner and silently read through the short script and answer the three questions provided

Goldilocks and the three bears

Today s purpose
Today’s Purpose

  • I will be able to understand Goldilocks Principle in relation to the importance of the Earth’s atmosphere and how it sustains life

  • I will be able to answer the following questions:

    • Compare and contrast Earth’s atmosphere to that of Venus and Mars. You may draw pictures to describe the difference, create a Venn diagram, draw a chart, or just write a description.

    • Explain how Earth’s atmosphere functions to keep us alive.

    • Predict what would happen to an astronaut if he were to take off his mask on the three different planets(Earth, Venus, and Mars)

What is an atmosphere
What is an atmosphere?

  • The mixture of gases surrounding the Earth or other celestial body, held in place by gravity

    • What does it mean by mixture?

      • Different types of gases blended together. For example, oxygen, nitrogen, carbon dioxide, water vapor, etc.

      • Mixture can be separated.

      • For example, trail mix is a mixture. You can separate the raisins from the almonds and M&M’s

      • How do you separate a mixture of air? It’s gases mixed together. Through a process called fractional distillation, the gases are cooled and compressed and expanded to liquefy them. Elements and compounds have different temperatures that they liquefy.


It s a ll about the percentages
It’s About the Percentages

  • Place the correct pie chart with the correct planet.

    • Hint: Think about what gas should be present or absent to make a planet too hot, too cold, and just right

Venus too hot
Venus (too hot)

  • 2nd planet from the sun

  • Similar atmosphere composition to Mars

    • 96.5% CO2

    • 3.5% N2

    • trace O2

  • Very dense atmosphere

  • CO2 concentration causes hot temperature and very hot greenhouse effect

  • Too hot to sustain life

  • Very high pressure

Image found at:

Greenhouse effect
Greenhouse Effect

  • Trapping of the sun’s radiation by the combination of gases found in the atmosphere, which causes a planet to warm

  • CO2 concentration usually behind the trapping of infrared radiation

    • Other gases include water vapor, methane, and CFC’s

Mars too cold
Mars (too cold)

  • 4th planet from the sun

  • Very thin atmosphere

    • 95% CO2

    • 2.7% N2

    • 0.13% O2

  • Due to thin atmosphere CO2 concentration has no effect on warming the planet, very low surface temperature

  • Too cold to sustain life

  • Very low pressure

  • Image found at:

    Earth just right
    Earth (just right)

    • Just the right amount of greenhouse gases (CO2, water vapor, methane) to warm the planet to sustain life

  • Composition of atmosphere

    • 78% N2

    • 21% O2

    • 0.9% Ar

    • Trace amount of greenhouse gases

  • Life on Earth helps sustain our atmosphere through the cycling of oxygen via photosynthesis

  • Without life Earth would either be like Mars or Venus

  • Pressure in between Mars and Venus

  • Image found at:

    Wrapping it up
    Wrapping it Up

    • At the bottom of your notes answer the three questions that were asked at the beginning of the period with the correct answer in complete sentences

    • In the left margin of your paper come up with three questions to ask about the notes you just taken

      • For example, Compare and contrast the atmosphere of Venus and Mars

    Worksheet found at:


    • Complete the reading dealing with the composition of the Earth’s atmosphere and complete the worksheet comparing cakes and the atmospheric gases

    Document found at:

    Quick write

    Quick Write

    For the next two minutes, write as many facts that you recall from yesterday. Be sure write the entire two minutes

    Today s purpose1
    Today’s Purpose

    • I will be able to understand how the chemical composition of the atmosphere allows for life on Earth

    • Tasks for today

    • Bellringer dealing with quick write of what you remember from previous day

    • Complete notes dealing with chemical composition of Earth’s atmosphere

    • Whiteboard review-you will be working with group to recall definitions, answer questions about atmosphere chemical composition

    Goldilocks and the three bears

    Image found at :

    Oxygen concentration


    Oxygen Concentration

    • Too much—more than 40% is toxic to humans begins to destroy cell structure and function

    • Too little— less than 16.5% humans blackout

    • Just write—21% human body functions properly







    Whiteboard review
    Whiteboard Review

    • Define the terms (picture, definition, context clue sentence)

      • Atmosphere

      • Chemical composition

      • Mixture

      • Greenhouse Effect

    • 2. Compare and Contrast

      • Earth’s atmosphere vs. Venus’

      • Earth’s atmosphere vs. Mars’

    • 3. Explain why Earth’s atmosphere allows life on Earth

    • 4. Explain what needs to happen to Venus’ atmosphere for it to be suitable for life

    • 5. Explain what needs to happen to Mars’ atmosphere for it be suitable for life

    Ticket out
    Ticket Out

    Write 3 test questions and the answer for each dealing with Earth’s atmospheric composition.

    Glad to have you please fill out the check off sheet
    Glad to Have You!!! Please fill out the check off sheet


    Find a news article about the atmosphere. Complete the graphic organizer about what you read.

    Goldilocks and the three bears1

    Goldilocks and the Three Bears

    7.E.1.1 Compare the composition, properties and structure of Earth’s atmosphere to include mixtures of gases and differences in temperature and pressure within layers.

    Welcome Back! Discuss with your partner the article that you read from the previous night. Write 3 facts from each article discussed.

    Goldilocks principle
    Goldilocks Principle

    Goldilocks principle1
    Goldilocks' Principle

    Atmosphere Display

    Colors for GHGs

    Nitrogen= red

    Oxygen= green


    Carbon dioxide = yellow

    Methane =white

    • Create a title

    • Place the appropriate amount of cotton balls in each bag

    • Label the bag with the planet it represents

    • Create a pie chart that represents the correct amounts of gases

    • Answer the questions at the end

    • Complete the presentation completely


    Complete 2 on the clock homework questions dealing with the atmosphere

    Glad to have you please fill out the check off sheet1
    Glad to Have You!!! Please fill out the check off sheet

    Human survival

    Human Survival

    Think about the composition of the Earth’s atmosphere. Fill in the handout with the role that the atmosphere plays for the various human life necessities

    Today s purpose2
    Today’s Purpose

    I will be observing the effect of the amount of atmospheric gases on life on earth

    I will be completing a module that simulates what happens when the various gas levels change

    Questions to answer by the end

    List the atmospheric conditions necessary for life on Earth.

    Explain the importance of each.

    Predict what happens to the Earth if each condition was not present.

    Atmosphere s role for life
    Atmosphere’s Role for Life

    Astro venture tasks
    Astro-Venture Tasks

    First , you are going to complete a Training Module

    You are going to be changing the amount of gases

    You are going to write detailed observation s about what happened

    ex. When the _____ was lowered first, the fish died. Then the grass and trees died. And finally all the animals died. The temperature dropped. Lowering ____made life on Earth cease and lowered the temperature.

    Your second module is a Challenger module. You may need to refer to your notes for assistance for completion.


    • Teach your parent/guardian/sibling about what you have learned this week. You must teach them for 15 minutes. After you have taught them for 15 minutes, they must write a summary about what they learned, how well you taught them, and how you can improve teaching them. Parent must sign and date it.