Ecosystems
The place where a plant or animal lives
What is a habitat
Cutting down trees for wood or farmland
What is deforestation
The number of people living in one area
What is population density
Coal, oil, and natural gas are this type of energy
What are fossil fuels
A gas that traps heat in the atmosphere
What is carbon dioxide
These organisms make their own food from sunlight
What are producers
Growing only one type of crop in a large area
What is monoculture
The maximum number of people or animals an area can support
What is carrying capacity
Energy that comes from the sun
What is solar energy
This makes rain more acidic and harms plants
What is acid rain
This shows who eats who in an ecosystem
What is a food chain
Using water to help grow crops
What is irrigation
When a population grows very quickly
What is exponential growth
A clean energy source made from flowing water
What is hydroelectric power
Pollution from cars, factories, and wildfires can make this in cities
What is smog
This cycle moves carbon through the air, plants, animals, and soil
What is the carbon cycle
This type of mining removes the surface layer of soil and rock
What is surface mining
Something that limits how big a population can grow (like food or space)
What is a limiting factor
This type of energy comes from heat deep inside the Earth
What is geothermal energy
Tiny particles in the air that can harm your lungs
What are particulates
The role or job an organism has in its ecosystem
What is a niche
This method helps reduce erosion on farms by planting crops in steps on hills
What is terracing
The number of births per 1,000 people in a year
What is birth rate
This is the energy saved when we use less electricity or fuel
What is energy conservation
The warming of the Earth due to greenhouse gases
What is global warming