#### Transcript Environment

```4/18 Bell Work
The sum of a four-digit number is a multiple
of 9. The first 3 digits are 1, 2, and 3.
 What
is the missing number?
4/18 Schedule


AIMS study guide
Due today including justifications!
Review material for sections you missed
 Cycles
Wksht to Review due TUESDAY
AIMS Science Test 4/19!!
Sophomores, Aud, 8:30
Bring a book or homework!
Assignments:
1. AIMS Study Guide due TODAY
2. Cycles Wkst due TUESDAY
4/19 Bell Work
Two hours ago it was as long after 1 o’clock in
the afternoon as it was before 1 o’clock in the
morning.

What time is it now?
4/19 Schedule
 2nd
and 3rd Hr - AIMS Test
 Work


Cycles Wksht to Review due TODAY
Extra Credit
AIMS Science Test 4/19!!
Sophomores, Aud, 8:30
Bring a book or homework!
Assignments:
1. AIMS Study Guide LATE
2. Cycles Wkst due TODAY
4/20 Bell Work
Duke Maverick worked for a packaging
company. One day, he mixed up the four
labels on his table, so he decided to apply
them at random.
 What
is the probability that he labeled
exactly 3 packages correctly?
4/20 Schedule
 Notes
Ch 6.1 “Interconnected Planet”
 Work

Cycles Wksht Review LATE
Assignments:
1. AIMS Study Guide LATE
2. Cycles Wkst LATE
Ch 6 “Environment
Objectives:
1. Describe biotic and
abiotic factors that affect
human populations
2. Assess how the size and
the rate of growth of a
population are affected by
birth rate, death rate,
immigration, emigration,
and carrying capacity of
the environment.
Unit : The
Environment
Environment and Pollution
 How
many different types of pollution can
you name?
 What
are the effects of pollution?
Pollution and Effects
List examples of pollution from industry, agriculture, or
everyday use. What effects do different kinds of
pollution have?
Ch 6.1 “An Interconnected Planet”
Objectives:

Describe how humans and the
environment are connected.

Differentiate between renewable and
nonrenewable resources.

Describe how the state of the
environment can affect a person’s
health and quality of life.
Humans and the Environment
 Humans
now live in almost every kind of
ecosystem on Earth.
 The
more that the human population
grows, the more resources we will need to
survive.
Humans and the Environment,
continued
 Earth
is an interconnected planet: we
depend on the environment, and the
environment is affected by our actions.
 Learning
us care for the environment and ensures
that the environment will continue to
support us and other species on Earth.
Resources
Renewable vs Nonrenewable Resources

Renewable resources are natural resources that can be
replaced at the same rate at which they are consumed.

The supply is either so large or so constantly renewed that it
will never be used up.

Nonrenewable resources are resources that form at a rate
that is much slower than the rate at which they are
consumed.
 Renewable
resources can still be used up if it is used
faster than it can be renewed.
Renewable Resources
Nonrenewable Resources
Resources, continued
 Most
of our energy today comes from fossil fuels.
Fossil fuels are nonrenewable energy resources that
formed from the remains of organisms that lived
long ago.
Fossil fuel formation
Resources, continued
 Fossil
fuels such as coal, oil, and natural gas, are
nonrenewable resources because it takes millions of
years for them to form.
 We
use fossil fuels at a rate that is faster than the
rate at which they form. So, when these resources
are gone, millions of years will pass before more
have formed.
The Environment and Health
 Health
and quality of life are affected by the state
of the environment.

Pollution and habitat destruction destroy vital resources like
the air we breathe, the water we drink, and the food we
eat.
The Environment and Health
 Fish
Anyone?
Ch 6.2 “Environmental Issues”
Objectives:
 Describe
effects of air and water pollution.
 Explain
the effects of fossil fuels on climate change.
 Identify
ways humans disrupt environments.
4/21 Bell Work
Sam, Buck, Sid, Slip, and Ari are playing poker.
Their cards were laid on the table. Suddenly
Sam leaps across the table and pummels Sid
who had been the last to deal.
 King, Queen, Ace
 2 Aces and a King
 3 Jacks
 2 Queens and an Ace
 2 Kings and an Ace

Why was Sam so angry at Sid?
4/21 Schedule
 Notes
Ch 6.2 “Environmental Issues”
 Work

Cycles Wksht Review LATE
Assignments:
1. AIMS Study Guide LATE
2. Cycles Wkst LATE
Air Pollution
Air pollution causes …




respiratory problems
results in acid rain
damages the ozone layer
may affect global temperature
Acid rain is precipitation that has an
unusually high concentration of sulfuric or
nitric acids caused by pollution.

Acid rain damages forests and lakes.
Effects of Acid RainAcid Precipitation
Air Pollution, continued
Ozone Layer
 Protects life on Earth from ultraviolet (UV)
rays.

The ozone layer has been damaged by
chlorofluorocarbons (CFCs).

CFCs are human-made chemicals that are
used as coolants in refrigerators and air
conditioners and as propellants in spray
cans.
Ozone “Hole” Over Antarctica
Global Warming
 Global
warming is the gradual increase in
the average global temperature.

The greenhouse effect is the warming of Earth
that happens when greenhouse gases in the air

Examples: CO2 and water vapor.

The greenhouse effect is necessary to keep
Earth’s temperatures stable.
Global Warming,
continued
 Global
temperatures have been rising

Most scientists think that this increase in
temperatures is caused by an increase in CO2.
from burning fossil fuels.
Global Warming,
continued
Increasing temperatures could cause
serious environmental problems.




Melting ice sheets
Sea level rise
Destruction of coastal ecosystems
Changes in weather patterns.
Water Pollution
Pollution enters groundwater when polluted surface
water percolates down through the soil.
 Run
off can contaminate both aquatic habitats
and public water sources.
Sources
Pollutants
Agriculture, farms, and lawns
Fertilizers and pesticides
Factories
Industrial waste
Oil run off
Septic tanks and landfills
Nitrogen, human waste,
chemicals, heavy metals
Water Pollution, continued
 Fertilizers
can run off into a body of water and
increase the amount of nutrients in the water.

Lots of nutrients means excessive growth of algae.

Algal blooms can deplete the dissolved oxygen in the
water. Fish and other organisms suffocate.
Water Pollution
Soil Damage
 Fertile
food.
soil allows agriculture to supply the world with
 Nutrients
that make soil fertile come from the
weathered rock as well as from bacteria, fungi and
the remains of plants and animals.
 The
processes that form just a few centimeters of
fertile soil can take thousands of years.
Soil Damage, continued
The greatest threat to soil is soil erosion.
 Erosion is a process in which the materials of
Earth’s surface are worn away and transported by
wind, gravity, or water.
 Plant
and tree roots help hold soil together and
protect it from erosion.
 Many
farming methods loosen the topsoil or
remove plants that hold the soil in place then it can
be washed away by wind or rain.
Soil Damage, continued
Sustainable agricultural practices can prevent erosion

Terracing changes a steep field into a series of flat
steps that stop gravity from eroding the soil.

In contour plowing, rows are plowed in curves along
hills instead of in straight lines. The rows then act as a
series of dams, which prevent water from eroding the
soil.

Planting a cover crop, such as soybeans, restores
nutrients to the soil.

Crop rotation, or planting a different crop every year,
slows down the depletion of nutrients in the soil.
Ecosystem Disruption
 Ecosystem
disruptions can result in loss of
biodiversity, food supplies, potential cures for
diseases, and the balance of ecosystems that
supports all life on Earth.
 Over
the last 50 years, about half of the world’s
tropical rain forests have been cut down or burned
for timber, pastureland, or farmland. This process of
clearing forests is called deforestation
Ecosystem Disruptions,
continued
 Ecosystem
disruption decreases the number of
Earth’s species.

Biodiversity affects the stability of ecosystems and the
sustainability of populations.

Every species plays an important role in the cycling of
energy and nutrients in an ecosystem. Each species
either depends on or is depended on by at least one
other species.
Ecosystem Disruptions,
continued
 When
a species disappears, a strand in a food web
disappears. If a keystone species disappears, other
species may also disappear.
 There
are many ways in which humans benefit from a
variety of life forms on Earth.

food, clothing, shelter, and medicine.
Ecosystem Disruptions,
continued
 Humans
have disrupted ecosystems by intentionally
and unintentionally introducing nonnative species.
 Many
species are on the edge of extinction.
Extinction is the death of every member of a
species.
in Australia.
Salt cedar
4/22 Bell Work
Slip shoots an arrow exactly at noon at a
target. He continues to shoot one every
minute until 1 pm. Assume he hits the target
every time.
 How
many arrows will be in the target?
4/22 Schedule
 Environmental

Issues Research
Research Day ½
 Get
notes Ch 6.2 “Environmental Issues”
online if missing
 Work


Cycles Wksht Review LATE
Assignments:
1. AIMS Study Guide LATE
2. Cycles Wkst LATE
Environmental Issues
Presentation

Pick one of the following topics, or get your
own approved.
-Acid Rain
- Light pollution
- Air pollution
- Deforestation
- Specific non-native species
- Chemical dumping
- Ozone depletion

Work alone or in pairs to research.

Prep today and MONDAY, Present next
week…
4/25 Bell Work
Ideas are like rabbits. You get a couple and
learn how to handle them, and pretty soon
you have a dozen.

John Steinbeck
 Make
 Ideas
are like ________________ because
____________.
4/25 Schedule
 Environmental

Issues Research
Research Day2/2
 Get
notes Ch 6.2 “Environmental Issues”
online if missing
 Work


Cycles Wksht Review LATE
Assignments:
1. AIMS Study Guide LATE
2. Cycles Wkst LATE
Environmental Issues
Presentation

Pick one of the following topics, or get your
own approved.
-Acid Rain
- Light pollution
- Air pollution
- Deforestation
- Specific non-native species
- Chemical dumping
- Ozone depletion

Work alone or in pairs to research.

Prep today and TUESDAY, present FRIDAY…
4/26 Bell Work
Terry is half as old as Alice was when Alice was five
years older than Terry is now.
 How
old is Terry?
4/26 Schedule
 Environmental


Issues Research
Finish Research and Presentation TODAY
Present FRIDAY
 Work


Cycles Wksht Review LATE
Assignments:
1. Cycles Wkst LATE
2. Environ Issues Research & Presentation FRIDAY
3. Ch 6 Dir Rdg TBA
Ususally
 Do
you, your family, or friends get flu
shots?
 How often? Why?
 How dangerous is getting the flu?
Compared to HIV?
 Why
do you think scientists were so
concerned about swine and bird flu?
Contaminated Water Demo
 Come
up to the front bench.
 Pick any test tube. Some of them are
“contaminated.”
 Pour your liquid into someone else’s test
tube and get half back.
 Repeat with another person.
 Check to see if you’ve been
contaminated.
 Return test tubes to rack.
Contaminated Water Demo
Contaminated Water Results
 blue = clean
 green = slight contamination
 yellow = contaminated