biology 1b evolution and environment gcse core key words: non-renewable, pollution, waste,...
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Biology 1b Evolution and EnvironmentBiology 1b Evolution and EnvironmentGCSGCSEE
CORCOREE
Key words: non-renewable, pollution, waste, indicators
Biology 1b Evolution and EnvironmentBiology 1b Evolution and EnvironmentGCSGCSEE
CORCOREE
Objective
How does population increase affect the earth?How does population increase affect the earth?
Success Criteria
By the end of the lesson I:
• know that there are increasing numbers of people on the planet
• can explain that an increase of people on the world increases the depletion of natural resources and produces more waste and pollution
Biology 1b Evolution and EnvironmentBiology 1b Evolution and EnvironmentGCSGCSEE
CORCOREE
Human impact on the environmentHow does human activity affect the environment?
Reduce Reduce the land the land available available for plants for plants
and and animalsanimals
Raw Raw materials materials (inc. non-(inc. non-renewablrenewabl
e) e) resources resources are being are being used upused upMore waste is More waste is
produced produced which (if not which (if not
handled handled properly) may properly) may
pollute air, pollute air, water & landwater & land
Biology 1b Evolution and EnvironmentBiology 1b Evolution and EnvironmentGCSGCSEE
CORCOREE
There are about 6.6 billion people in the world and over 95 million babies are born per year – that is an average of three babies per second!
Population growth
Has the rate of population growth always been the same?
Biology 1b Evolution and EnvironmentBiology 1b Evolution and EnvironmentGCSGCSEE
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The human population is said to be growing exponentially. This means that the larger the population, the faster it grows.
Exponential growth
An increase in average life expectancy is largely responsible for the rapid increase in population. Why do people live longer than they did hundreds of years ago?
better healthcare (hospitals, medicines, vaccines)
more and better food
cleaner water
better sanitation
The biggest increase in population is in developing nations, rather than developed nations. Why do you think is the case?
Biology 1b Evolution and EnvironmentBiology 1b Evolution and EnvironmentGCSGCSEE
CORCOREE
Computer models can be used to make predictions about population growth by using assumptions about birth rate.
Predicting future growth rate
Most analysts assume that birth rates will fall within the next 50 years. Why do you think this might happen?
How important do you think predictions about climate change and unsustainable development are in the analysts’ calculations?
decreased fertility lack of resources disease war
Biology 1b Evolution and EnvironmentBiology 1b Evolution and EnvironmentGCSGCSEE
CORCOREE
use moreraw materials
usemore energy
usemore land more people
buildings, farms, quarries and
dumps fossil fuels
Using resources and producing pollution
produce more waste
and pollution
sewage, fertilizer and toxic waste
CO2, SO2, CO and smoke
pesticides and herbicides
minerals
Humans use land forHumans use land for1.1. BuildingBuilding2.2. QuarryingQuarrying3.3. FarmingFarming4.4. DumpingDumping
We pollute theWe pollute the• WATER – with sewage, fertiliser, toxic chemicalsWATER – with sewage, fertiliser, toxic chemicals• AIR – with gas such as sulfur dioxide and smokeAIR – with gas such as sulfur dioxide and smoke• LAND – with pesticides and herbicides (these can LAND – with pesticides and herbicides (these can be washed into the water)be washed into the water)
Biology 1b Evolution and EnvironmentBiology 1b Evolution and EnvironmentGCSGCSEE
CORCOREE
Graphing
Draw a graph from the provided information
Biology 1b Evolution and EnvironmentBiology 1b Evolution and EnvironmentGCSGCSEE
CORCOREE
Objective
How does population increase effect the earth?How does population increase effect the earth?
Success Criteria
By the end of the lesson I:
• know that there are increasing numbers of people on the planet
• can explain that an increase of people on the world increasing the depletion of natural resources and produces more waste and pollution