3. Summary
Organisms are well adapted to survive in their
normal environment. Population size depends
on a variety of factors including competition,
predation, disease and human influences.
Changes in the environment may affect the
distribution and behaviour of organisms.
5. Starter: Use three words to describe each
of these environments.
The Arctic:
1)
2)
3)
The desert:
1)
2)
3)
6. Adaptation
• Adaptation is a special feature or behaviour that
makes an organism particularly suited to its
habitat.
• Adaptations may be general or specific.
• General = having legs to walk or fins to swim
• Specific = special features so an animal can
survive in is environment
7. A Shark’s General Adaptations
What are a shark’s general adaptations to life in an aquatic
environment?
streamlined shape
to reduce friction
when moving
through water
fins provide
stability, power
and control
gills have a large
surface area so
that oxygen can be
extracted from the
surrounding water
8. A Shark’s Specific Adaptations
What are a shark’s specific adaptations to life as an aquatic
predator?
specialized sense organs can
highly sensitive
detect the sound, movement and
sense of smell that
electrical fields of other organisms
can detect drops of
blood from miles
away
lots of very sharp
teeth that are
constantly replaced
silver colouring
underneath acts as
camouflage
10. Adaptations
• The two environments we saw before are
harsh environments for animals to survive
in so the animals have had to adapt to
survive.
11. Animals in Cold Climates
• Arctic animals must keep themselves
warm to survive.
• You loose body heat through your
body surface, mainly your skin.
• Arctic animals have developed many
adaptations to help them survive…
12. Look at the following…
What do these
animals have in
common?
13. Animals in Cold Climates
Common features:
- Thick fur coats
- Layer of blubber under the skin
- Colour – many change colour in the
summer
- What about body shape?
14. Body Shape
- Have fat, round body
shapes with short legs
- Have small ears –
why?
15. Animals in Dry Climates
• Animals in dry climates have to keep
themselves cool to survive.
• They also have to cope with a lack of
water.
• This means they are unable to loose heat
through sweating – why?
16. Look at the following…
What do these
animals have in
common?
17. Animals in Dry Climates
Common features:
- Large thin ears
- Little body fat
- Thin, silky fur
- Long limbs to help spread heat
- They also often only come out at night. Why?
- What about body shape?
19. Surface Area to Volume Ratio
• Animals loose heat from the body
surfaces that are in contact with the
surrounding air/water.
• Reducing this contact surface reduces
heat loss
• Increasing the surface increases heat loss
Teacher notes
This true-or-false activity could be used as a plenary or revision exercise on adaptation, or at the start of the lesson to gauge students’ existing knowledge of the subject matter. Coloured traffic light cards (red = false, yellow = don’t know, green = true) could be used to make this a whole-class exercise.
