Vocabulary Basics
What does population mean?
The number of people in an area.
Which system includes water?
Hydrosphere
How does cutting forests affect the land?
It erodes soil (lithosphere).
What is evidence?
Facts or data that support a claim.
How many people live on Earth now?
About 8 billion
What is per-capita consumption?
The amount of resources one person uses.
What system is Earth’s land called?
Lithosphere
What happens to the hydrosphere when more people use water?
It depletes water sources.
Give an evidence example for atmosphere impact.
CO2 levels up 50% since 1990.
How much water does one person use daily (per-capita)?
About 150 gallons
Define natural resources.
Materials from Earth we use, like water or trees.
Which system is the air we breathe?
Atmosphere
How do cars impact the atmosphere?
They release CO2/pollution.
What does "argument" mean in this standard?
A claim with evidence about human impact.
What % has CO2 increased since 1990?
50%
What is resource depletion?
Using resources faster than they can renew.
What system includes plants and animals?
Biosphere
How does building cities affect the biosphere?
It destroys habitats.
Make a claim: “More people hurt the hydrosphere because…”
“…they use more water.” (e.g., 150 gallons/day)
How many people were on Earth in 1950?
2.5 billion
What does carbon footprint measure?
The CO2 released by a person’s actions.
Name all 4 Earth systems.
Lithosphere, Hydrosphere, Atmosphere, Biosphere
Name one impact on each system from population growth
Litho: erosion, Hydro: depletion, Atmo: pollution, Bio: habitat loss
Build an argument: Population growth + biosphere + evidence.
“More people hurt the biosphere by clearing land; animal habitats shrink.”
How many hectares of forest are lost yearly?
10 million