Download Unit 3 - Life on Earth

Examples
What does the term biodiversity mean?
Community
Niche
What does the phrase
abiotic factor mean?
Biome
Define the terms.
Biodiversity and
the Distribution
of Life
Equation for an
ecosystem.
Ways humans impact the
environment. Give a short
description of each.
Describe the effect of
grazing on plant biodiversity.
How does acid rain
form?
Describe the effect
of an increase in
water temperature
on biodiversity.
Air pollution.
Deforestation.
Desertification.
Name processes 1, 2 and 3, from the Nitrogen Cycle.
1
Explain the difference between intraand inter- specific competition.
3
Explain why
most food
chains are 4 (or
less) organisms
in length.
2
2
Energy in
Ecosystems
Name the type of organisms which carry
out the process in the Nitrogen Cycle.
Draw or describe a pyramid
of numbers.
Three ways in
which energy can
be lost from a food
chain/web.
Give the meanings of the
following terms.
Producer.
Give 2 reasons why a pyramid
of numbers may have an
irregular shape.
Consumer.
Decomposer.
Diagram showing process of speciation.
Two types of
isolation
barrier and
two examples
of each.
Biological definition of a species.
Sampling Techniques/
Adaptation, Natural
Selection and Evolution
Give one
way errors
may be
minimised
when
using…
Define the
term
mutation.
PITFALL TRAPS
QUADRAT
pH METER
LIGHT METER
Explain the “adaptive
significance” of
woodlice moving to
dark/damp areas in a
choice chamber.
One example of
a physiological
adaptation (and
its function) in a
desert rat…
Give three examples of
mutagenic agents.
Two examples of structural
adaptations (and their function)
in…
POLAR BEARS
Decomposer.
CACTI
What is a monoculture?
Give one
advantage and
one
disadvantage
of a
monoculture.
What is biological control? Give an
example.
What is an
indicator
species?
Human Impact
on the
Environment
What is
bioaccumulation?
Give an example.
What are
pesticides?
Describe the problems
associated with leaching.
Four
essential
plant
nutrients,
the role and
deficiency
symptoms of
each.
Substance added to
soil to improve
nutrient levels.
ADVANTAGE
DISADVANTAGE
DISADVANTAGE
DISADVANTAGE