Entering the Classroom

• Pick up a packet that says: “Human Effect on Ecosystems” and an Exit Ticket Paper.

• Get out your binder, a sharp pencil, and sit in your assigned seat.

Objectives• C: Define: ozone Layer, Chlorofluorocarbons

(CFCs), Renewable resources, nonrenewable resources, greenhouse effect, Erosion

• L: Write complete sentences, using these vocab words.

Standard:II.III.II.2. Know that changes to ecosystems sometimes decrease the capacity of the environment to support some life forms and are difficult and/or costly to remediate.

Flashback1. A scientist has a theory about how horses evolved. In order to be less biased, the

scientist should write an article that tells:• Only the facts that support the theory• All of the weak points of other theories• All of his other theories that have been accepted• All of the facts, whether they agree with his theory or not

2. The picture below shows an experiment designed to test how quickly plants grow, based on how much water the plants are given. Which of these changes would make this a better experiment? Cover each plant with plastic wrap Add salt to the soil of plant A Use the same size of pot for each plant Grow different plants in each pot

3. Scientist A conducted a study to see which type of gum had the longest lasting flavor. This scientist had one person chew two different types of gum. What could the scientist in order to get more accurate results?

Flashback1. A scientist has a theory about how horses evolved. In order to be less biased, the scientist

should write an article that tells:• All of the facts, whether they agree with his theory or not

2. The picture below shows an experiment designed to test how quickly plants grow, based on how much water the plants are given. Which of these changes would make this a better experiment? Use the same size of pot for each plant

3. Scientist A conducted a study to see which type of gum had the longest lasting flavor. This scientist had one person chew two different types of gum. What could the scientist in order to get more accurate results?

In order to get more accurate results, the scientist should conduct more than one trial. If the scientist has a larger sample size, then the experiment will be more accurate.

Key Question: Why can’t humans live on Mars?

http://www.youtube.com/watch?v=sEN9OXzkLNQ&feature=related

Ozone Layer

• A layer of Ozone gas high above the earth that helps protect plants and animals from harmful UV light

Chlorofluorocarbons (CFCs)

• Compounds from aerosol cans, refrigerators, and air conditioners that break down ozone gas.

Renewable Resource

• Renewable resources are resources that can be renewed or replaced.

Exit Ticket

4. Ultraviolet (UV) light from the sun is known to cause damage to living cells. What protects living things on Earth from this dangerous light?

Exit Ticket

4. Ultraviolet (UV) light from the sun is known to cause damage to living cells. What protects living things on Earth from this dangerous light?– The ozone layer protects living things on earth

from dangerous UV light.

Nonrenewable Resource

• A nonrenewable resource is a resource that cannot be easily replaced or remade.

Greenhouse Effect

• The greenhouse effect is a process in which gasses in the atmosphere trap heat close to the Earth’s surface.

Erosion

• Erosion is a process that wears away earth’s surface (usually by wind or water)

Exit Ticket

5. Name an example of a Renewable Resource.6. Name an example of a Nonrenewable

Resource.

Exit Ticket

5. Name an example of a Renewable Resource.– Wind, water, and solar energy are all renewable.

Trees are also renewable.

6. Name an example of a Nonrenewable Resource.– Coal, oil, and gasoline are all fossil fuels that are

nonrenewable.

Your assignment: Write sentences and draw pictures for each vocab word.

When you finish, raise your hand to get a grade. (If you finish early, add color for extra credit)

Entering the Classroom

• Pick up a lab handout—Human Impact Lab• Get out a sharp pencil, and sit in your assigned

seat.• No binders needed today.• Write your name at the top of the page.

Opening:

• Read the Background information, and answer the 3 “reading check” questions.

• Write in complete sentences.

Reading Check Questions

1. Coal, gas, propane, and oil are nonrenewable resources.

2. The ozone layer blocks harmful UV light that could damage our DNA.

3. Erosion is when wind and water carry away the soil (or wear away the earth)

Hypothesis

• I think….• Because…

Materials

• Lab paper• Pencil• ______________________• ______________________• ______________________

Procedure:Directions: Write these in a numbered list and

put them in the correct order.

• Finish by writing a conclusion• Record all data and draw a picture of what

you see.• Walk outside the school (stay on campus)• Use touch, hearing, smell, and sight to

describe human impact on the earth (but don’t touch dangerous materials)

• Grade yourself on the rubric.

Procedure:(correct order)

1. Walk outside the school (stay on campus)2. Use touch, hearing, smell, and sight to

describe human impact on the earth (but don’t touch dangerous materials)

3. Record all data and draw a picture of what you see.

4. Finish by writing a conclusion.5. Grade yourself on the rubric.

Entering the Classroom

• Get out your packet that says: “Human Effect on Ecosystems” and pick up an Exit Ticket Paper.

• Get out your binder, a sharp pencil, and sit in your assigned seat.

Flashback1. The picture below shows an experiment designed to test how quickly plants grow, based on

how much water the plants are given. What changes would make this a better experiment?

2. In order to be less biased (or unfair), what should a scientist do when writing a paper about a new theory about the evolution of mice?

– Tell all of the facts, whether they agree with the theory or not– Tell only the facts that support the theory

3. The table below shows average temperature for 4 cities. Assuming that the climate doesn’t change, which city’s temperature data are most reliable for predicting future temperature for the city? Explain your answer.

Flashback1. The picture below shows an experiment designed to test how quickly plants grow, based on

how much water the plants are given. What changes would make this a better experiment?

2. In order to be less biased (or unfair), what should a scientist do when writing a paper about a new theory about the evolution of mice?

– Tell all of the facts, whether they agree with the theory or not– Tell only the facts that support the theory

3. The table below shows average temperature for 4 cities. Assuming that the climate doesn’t change, which city’s temperature data are most reliable for predicting future temperature for the city? Explain your answer.

To make this a better experiment, the scientist could use the same size of pots for each trial.

New York is most reliable because it has the largest sample size.

Objectives• C: Complete Cornell Notes about “Why Earth

can support life” and “How humans change the earth”

• L: Write cue words and a summary of your Cornell Notes

Standard:II.III.II.2. Know that changes to ecosystems sometimes decrease the capacity of the environment to support some life forms and are difficult and/or costly to remediate.

Key Question: Why can’t humans live on Mars?

What do we need to live on earth?

Why can the Earth support life?

I. Earth can support life for several reasons.

A. Earth is the perfect distance away from the sun—not too hot or too cold.

Why can the Earth support life?

B. Earth has an atmosphere

1. The atmosphere contains a layer of ozone gas that protects our skin from most harmful UV light

2. The atmosphere contains oxygen and carbon dioxide—needed by animals and plants

Why can the Earth support life?

C. The earth has all the required minerals and elements necessary for life—Nitrogen, Carbon, Oxygen, Phosphorous

D. Earth has lots of liquid water

Nitrogen

Carbon

Oxygen

Phosphorous

Exit Ticket:4. Mercury is much closer to the sun than the

Earth. What is one reason humans can’t live on Mercury?– Mercury is too cold– Mercury is too hot– Mercury has no moon

5. What might happen to rivers and streams on the earth if the earth was moved much further away from the sun?

Exit Ticket:4. Mercury is much closer to the sun than the Earth.

What is one reason humans can’t live on Mercury?– Mercury is too cold– Mercury is too hot– Mercury has no moon

5. What might happen to rivers and streams on the earth if the earth was moved much further away from the sun?– Rivers and streams would freeze if the earth was

moved much further away from the sun.

How do humans change the earth (part 1)I. Humans

change the earth’s ecosystems

A. Using nonrenewable resources usually releases carbon dioxide and other gases into the atmosphere

1 ton of coal burned = 4 tons of carbon dioxide emitted.

How do humans change the earth (part 1)1. Burning fossil fuels

like coal, oil, and gasoline releases carbon dioxide,

2. Carbon dioxide contributes to the greenhouse effect—raising earth’s temperature

3. Nuclear power plants release hot water into ecosystems, which kills organisms.

How do humans change the earth (part 1)1. Using renewable

resources helps decrease our impact on earth’s ecosystems

2. Humans release Chlorofluorocarbons (CFCs) into the atmosphere 1. CFCs destroy the ozone

layer, which protects us from harmful UV light.

2. Harmful UV light damages DNA and can cause cancer

How do humans change the earth (part 1)D. Clearing plants from the land increases erosion because

plant roots help hold the soil in place.

Exit Ticket:(answer in complete sentences that restate the question)

6. Why are Fossil Fuels considered nonrenewable resources?

7. What might happen to the Earth’s Temperature if we INCREASED the amount of people driving cars?

8. How do plants help decrease erosion?

Exit Ticket:(answer in complete sentences that restate the question)

6. Why are Fossil Fuels considered nonrenewable resources?– Fossil fuels are nonrenewable resources because they

are not easily remade or replaced.

7. What might happen to the Earth’s Temperature if we INCREASED the amount of people driving cars?– The earth’s temperature would increase there were

more people driving cars.

8. How do plants help decrease erosion?

Exit Ticket:(answer in complete sentences that restate the question)

8. How do plants help decrease erosion?– Plants decrease erosion by holding the soil in

place with their roots.

Your Assignment:

• Write cue words and a summary for your Cornell Notes.

• If you finish early, quietly start studying your Cornell Notes or working on your study guide for your CBM.

Flashback1. The picture below shows an experiment designed to test how quickly plants grow, based on

how much water the plants are given. What changes would make this a better experiment?

2. In order to be less biased (or unfair), what should a scientist do when writing a paper about a new theory about the evolution of mice?

– Tell all of the facts, whether they agree with the theory or not– Tell only the facts that support the theory

3. The table below shows average temperature for 4 cities. Assuming that the climate doesn’t change, which city’s temperature data are most reliable for predicting future temperature for the city? Explain your answer.