Ch. 10 Lesson 2How are
resources used for energy?
Uses of Sun’s energy:
1. plants use it for photosynthesis
2. solar energy transferred from plants animals thru. food chains
Uses of Sun’s energy:
3. solar cells/panels collect energy
4. sunlight warms Earth
Other renewable energy sources:
wind energy
Other renewable energy sources:
energy from flowing water
nonrenewable energy resourcessupplies that exist in limited amounts or are used much faster than can be replaced in nature
orerock rich in minerals that can be removed from Earth
fossil fuels made from organisms that
lived long ago examples:1. coal 2. natural gas3. oil (petroleum)
coalformed
from ancient plants
how coal is formed:1. millions of yrs. ago, dead plants
were buried in swamps2. layers of dead plants hardened
& formed sedimentary rock by heat & pressure
3. chemicals stored in these organisms became coal
when coal is burned, releases energy from sun
collected by ancient plants
impact of fossil fuels:mining fossil fuels harms environment
impact of fossil fuels:oil spills cause pollution & kills marine life
impact of fossil fuels:burning fossil
fuels releases harmful substances that causes air pollution, (incl. acid rain) & global warming
ACID RAIN FORMATION
conservationusing only the resources you need
as efficiently as possible
recyclingsaving, collecting, or using materials again
instead of treating them as waste
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