SlideShare a Scribd company logo
1 of 2
Download to read offline
Chapter 20 Lesson 1: People and the Environment –p718-722 - Page1
New Vocabulary
• Population (719) – all the members of a species living in a given area
• Carrying Capacity (720) – the largest number of individuals of a given species that Earth’s resources
cam support and maintain for a long period of time
Population and Carrying Capacity
• For scientist, a population is all the members of a
______________ living in a given area.
• We are a population of _________________! (hurray)
• There are also ___________ and ____________ that make
up separate populations in your area.
The Human Population
• Earth was once home to relatively few humans
• Today, about ________________ billion people live on Earth. The greatest increase in
human population occurred during the last few centuries
Population Trends
• A sudden rise in human population that has happened in recent history is called a
______________________ _____________________.
• Look at the chart
• What caused this sharp increase?
o _______________________
o _________________________
o Technological advancements
 In 1 hour about 15000 babies will be born
Chapter 20 Lesson 1: People and the Environment –p718-722 - Page2
Population Limits
• All living things have certain needs.
• What do humans need?
• Where do all the materials we use for products come from?
• Does Earth have enough resources to support an unlimited number of humans?
• Earth has limited resources
o It cannot support a population of any species in a given environment beyond its
carrying capacity
• Carrying capacity is the largest number of individuals of a given species that earth’s
resources can support and maintain for a ___________ ______________.
o If the human population continues to grow beyond Earth’s carrying capacity,
eventually Earth’s _______________________ will run out.
Impact of Daily Actions
• As of 2012, the human population is _____________________ billion
o Everyone is using resources
o Think, everyday people should be drinking 2-3 liters of liquids a day
o That’s 14,000,000,000L of liquid consumed in a day used just for drinking (if
everyone got the necessary amount)
Consuming Resources
• Like most people, I hope you are taking a shower every day. What resources are needed to
make that happen?
o The _____________________ in the pipes are obtained through mining, which
causes pollution and destroys habitats
o ____________________ is needed to transport those metals, which releases
pollution into the atmosphere
o You probably use a _____________________ towel. Fertilizers often used to grow
crops run off into water and affect overall water quality
• Think about all the activities you do in a week and the resources needed to make them
possible. Then, multiply that by 7 billion.
o This why using resources wisely, even at a personal level, can help Earth
Positive and Negative Impacts
• Not all human activities have a negative impact on the environment.
• What are some positive and negative impacts of humans?

More Related Content

More from Korrnell Academy: L Class Grade 8 Science

More from Korrnell Academy: L Class Grade 8 Science (20)

G7 ch2.3 2.4 - cellular transport
G7 ch2.3 2.4 - cellular transportG7 ch2.3 2.4 - cellular transport
G7 ch2.3 2.4 - cellular transport
 
G7 cell cycle
G7 cell cycleG7 cell cycle
G7 cell cycle
 
G7 ch2.3 moving cellular material
G7 ch2.3   moving cellular materialG7 ch2.3   moving cellular material
G7 ch2.3 moving cellular material
 
G7 ch2.2 the cell
G7 ch2.2   the cellG7 ch2.2   the cell
G7 ch2.2 the cell
 
G7 ch2.1 cells and life
G7 ch2.1   cells and lifeG7 ch2.1   cells and life
G7 ch2.1 cells and life
 
G7 ch1.1 characteristics of life
G7 ch1.1   characteristics of lifeG7 ch1.1   characteristics of life
G7 ch1.1 characteristics of life
 
G7 ch7.1 transport and defense
G7 ch7.1   transport and defenseG7 ch7.1   transport and defense
G7 ch7.1 transport and defense
 
G7 ch1.3 exploring life
G7 ch1.3   exploring lifeG7 ch1.3   exploring life
G7 ch1.3 exploring life
 
Stages of mitosis
Stages of mitosisStages of mitosis
Stages of mitosis
 
G9 energy processing notes
G9 energy processing notesG9 energy processing notes
G9 energy processing notes
 
G9 ch 10 meiosis
G9 ch 10   meiosisG9 ch 10   meiosis
G9 ch 10 meiosis
 
G9 ch9.2 mitosis and cytokinesis
G9 ch9.2 mitosis and cytokinesisG9 ch9.2 mitosis and cytokinesis
G9 ch9.2 mitosis and cytokinesis
 
G9 ch9.1 cell cycle
G9 ch9.1 cell cycleG9 ch9.1 cell cycle
G9 ch9.1 cell cycle
 
G9 Chapter 9.1 Cell Cycle
G9 Chapter 9.1 Cell CycleG9 Chapter 9.1 Cell Cycle
G9 Chapter 9.1 Cell Cycle
 
G9 mitosis mc quiz
G9 mitosis mc quizG9 mitosis mc quiz
G9 mitosis mc quiz
 
G9 ch5.1 biodiversity
G9 ch5.1   biodiversityG9 ch5.1   biodiversity
G9 ch5.1 biodiversity
 
G9 ch5.1 biodiversity
G9 ch5.1   biodiversityG9 ch5.1   biodiversity
G9 ch5.1 biodiversity
 
G9 structures of the cell mc quiz
G9 structures of the cell mc quizG9 structures of the cell mc quiz
G9 structures of the cell mc quiz
 
G9 ch2.2 energy in an ecosystem
G9 ch2.2   energy in an ecosystemG9 ch2.2   energy in an ecosystem
G9 ch2.2 energy in an ecosystem
 
G9 ch2.2 energy in an ecosystem
G9 ch2.2  energy in an ecosystemG9 ch2.2  energy in an ecosystem
G9 ch2.2 energy in an ecosystem
 

Outline: Chapter 20.1: People and their Environments

  • 1. Chapter 20 Lesson 1: People and the Environment –p718-722 - Page1 New Vocabulary • Population (719) – all the members of a species living in a given area • Carrying Capacity (720) – the largest number of individuals of a given species that Earth’s resources cam support and maintain for a long period of time Population and Carrying Capacity • For scientist, a population is all the members of a ______________ living in a given area. • We are a population of _________________! (hurray) • There are also ___________ and ____________ that make up separate populations in your area. The Human Population • Earth was once home to relatively few humans • Today, about ________________ billion people live on Earth. The greatest increase in human population occurred during the last few centuries Population Trends • A sudden rise in human population that has happened in recent history is called a ______________________ _____________________. • Look at the chart • What caused this sharp increase? o _______________________ o _________________________ o Technological advancements  In 1 hour about 15000 babies will be born
  • 2. Chapter 20 Lesson 1: People and the Environment –p718-722 - Page2 Population Limits • All living things have certain needs. • What do humans need? • Where do all the materials we use for products come from? • Does Earth have enough resources to support an unlimited number of humans? • Earth has limited resources o It cannot support a population of any species in a given environment beyond its carrying capacity • Carrying capacity is the largest number of individuals of a given species that earth’s resources can support and maintain for a ___________ ______________. o If the human population continues to grow beyond Earth’s carrying capacity, eventually Earth’s _______________________ will run out. Impact of Daily Actions • As of 2012, the human population is _____________________ billion o Everyone is using resources o Think, everyday people should be drinking 2-3 liters of liquids a day o That’s 14,000,000,000L of liquid consumed in a day used just for drinking (if everyone got the necessary amount) Consuming Resources • Like most people, I hope you are taking a shower every day. What resources are needed to make that happen? o The _____________________ in the pipes are obtained through mining, which causes pollution and destroys habitats o ____________________ is needed to transport those metals, which releases pollution into the atmosphere o You probably use a _____________________ towel. Fertilizers often used to grow crops run off into water and affect overall water quality • Think about all the activities you do in a week and the resources needed to make them possible. Then, multiply that by 7 billion. o This why using resources wisely, even at a personal level, can help Earth Positive and Negative Impacts • Not all human activities have a negative impact on the environment. • What are some positive and negative impacts of humans?