7Ca Environmental Impact

7/31/2019 7Ca Environmental Impact

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7CEcology

Matters.


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Creating new buildings forhumans to live in or workin, destroys habitats.

We need places to liveand work, but animals alsoneed a place to live, mate

and feed.

Sometimes rare plants andanimals are found nearbuilding sites.

The rare organisms couldbe moved to other sites ornew buildings adapted to

allow them to stay!


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What is ahabitat?

A place where any organismlives is called a habitat.

These places areall examples ofhabitats.


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Whatare

organisms?

What does ahabitatprovide?

Wheres ournearesthabitat?


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What is an environment?The habitat for this fox

is the Arctic.

We would describetheArctic as cold, snowy, icyor even windy and freezing.

These conditions describethe environment.

Describe the followinghabitats as

environments


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Learning Check!

1. Define the words habitat andenvironment.

2. Give an example of a habitat and

describe the environment of thathabitat.3. Homework! Find out what the following words

mean. Community, microhabitat,

adaptation and behaviour.Learn as

spellings!


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Learning Check! Answers!

1. Habitat is where an organism lives.2. Teacher to check your response

3. Homework.

Communityrefers to all the plants and animalsthat live in a particular habitat. A microhabitatexample. A woodlouse lives in

the woods but may only be found under wettree bark or stones.

Behaviourdescribes what an animal does. E.g.fish swim, frogs hop or babies cry.

Adaptationsare things like, fish have gills andfins which helps them to live in water.


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By the end of this bit you must State some adaptations of plants and

animals in different habitats. Explain why changes in habitats cause

problems for organisms. Give reasons why plans for a development

might need to be changed.


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Polar bears dont eat

penguins because

(apart from the oddzoo) they have never

met them. Polar

bears mainly live inthe Arctic region and

penguins mostly live

near the Antarctic.

They are poles apart,

literally.


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The Great Crested Newt is a

very rare organism in the UK.

In 2004 a company wanted to

build over 500 houses near

York. Had the project goneahead, as it was planned, the

Great Crested Newt may have

been wiped out in that area.

The company changed their

plans; they preserved the ponds

needed by the newt and the

houses were built in 2007.

This is Tiny.Why do they call him Tiny?

Because hes my newt!


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Learning Check!

1. Name 2 adaptations of a cactus plant,a polar bear and a penguin.

2. Describe in science terms how global

warming affects a polar bears life.3. Explain why a company might have toadapt its original plans to help protecta species. Extension Task!State how we humans can help toreduce the effects of global warming.


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By the end of this bit you must Give examples of adaptations to

daily and seasonal change.

Give examples of animals thathibernate and state why they do.

State the main differences

between deciduous and evergreentrees.

7Cc All Change


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Plants, for example, undergo many

daily and seasonal changes. During

the day they will give off scent and

open their petals to attract insects.

These are examples of daily change.In Autumn trees will

shed their leaves, as

they struggle tophotosynthesise in

the Winter. This is a

seasonal change.


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The Great Crested Newt has adapted to feed at night

(nocturnal feeder) to avoid predators.

This is an example of daily change to survive.

This newt also

hibernates when food isscarce. Hedgehogs, frogs

and ladybirds also

hibernate. This isseasonal change to help

survive a habitat or

environment.


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The trees on the left are called evergreen trees, they dont

lose their leaves in Winter. The trees on the right are

deciduous trees, they do lose their leaves in

Autumn/Winter.

Deciduous trees lose

their leaves in Winter

because there is not

much light for

photosynthesis; plus

leaves lose water

which cant be

replaced if the ground

is frozen.

Evergreen trees have

tougher leaves that

dont lose much water.

Plus, they are usually

found much further

north where there is

little light in shorter

summers. Christmas

trees are evergreens


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Learning Check!

1. Name 2 daily adaptations in animals and2 in plants.2. Give an example of 1 hibernating

organism and why it hibernates.

3. State why deciduous trees lose theirleaves in Winter.

4. Give 2 reasons why evergreens dont needto lose their leaves in Winter.

H/W.Investigate how birds called swallowsdeal with harsh British winters.


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By the end of this bit you must

Describe some ways in which

predators and prey are adaptedto finding food and feeding.

7Cd Finding Food


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Eagle adaptations: Forward facing eyes

to spot prey.

Hooked beak to cutfish flesh. Huge, sharp talons

(claws) to grip prey.

It can fly veryquietly.

Amazing eyesight.


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Some fish bury themselvesto avoid predators.

Some fish

camouflage

themselves by

looking like their

surroundings.

Some fish inflate

themselves and have

sharp spines.


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Learning Check!

1. Describe 3 adaptations of an eagle thathelps it catch a fish. Say how eachadaptation helps.

2. How are fish some adapted to stop

themselves being hunted by predators?3. What are herbivores, omnivores and

carnivores?

(Give 1 example of each)Homework.What adaptations do we have that help avoid beinghunted by a lion, for example?


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Woodlice Habitat Investigation.

Woodlice Info!

1.Woodlice like dark, damp places.2.Woodlice have gills, like fish!3.Woodlice are more related to crabs

than insects.4.Woodlice are decomposers.

You will investigate whether number 1is true.

Dark and damp this way!

http://www arkive org/common-
http://www.arkive.org/common-woodlouse/oniscus-asellus/video-00.htmlhttp://www.arkive.org/common-woodlouse/oniscus-asellus/video-00.htmlhttp://www.arkive.org/common-woodlouse/oniscus-asellus/video-00.html


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I love dark, damp

places because I have

gills, so I need to keep

damp or I will die.

http://www.arkive.org/common

woodlouse/oniscus-asellus/video-00.html
http://www.arkive.org/common-woodlouse/oniscus-asellus/video-00.htmlhttp://www.arkive.org/common-woodlouse/oniscus-asellus/video-00.htmlhttp://www.arkive.org/common-woodlouse/oniscus-asellus/video-00.htmlhttp://www.arkive.org/common-woodlouse/oniscus-asellus/video-00.htmlhttp://www.arkive.org/common-woodlouse/oniscus-asellus/video-00.htmlhttp://www.arkive.org/common-woodlouse/oniscus-asellus/video-00.htmlhttp://www.arkive.org/common-woodlouse/oniscus-asellus/video-00.htmlhttp://www.arkive.org/common-woodlouse/oniscus-asellus/video-00.htmlhttp://www.arkive.org/common-woodlouse/oniscus-asellus/video-00.html


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Prepare quarters as labelled.

Use moist soil, dead leaves and

twigs for dark damp area. Spraybefore testing.

Use cotton wool and sawdust in

dry areas.

Use lab lighting only or cool lamps.

Microscope lamps will kill the

woodlice in minutes.

Place 15-20 woodlice in the centre

hole in the box lid and record

where they go every minute for 15

minutes. Make a graph of results.

Light

and dry

Light and

damp

Dark

and dry

Dark

and

damp


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Year 7 AF3 AssessmentAdd 15-20 woodlice through the hole in the top and start the stop clock.

L3/4 Each minute record the number of woodlice in each section in a table.L3/4 After 15 minutes record the number of woodlice in each section of the chamber in a

table.

Add your data to the class results and copy down the results for the whole class.

L3/5 In what ways was it good to carry out this investigation as a group?L4/5 Draw graphs of all of the results, remembering to label the axes.

L3/5 Use your results to say which condition woodlice like best and try to explain why

this is.

L6 Did you use your own results (primary data) or the class results (secondary data).

Why?

L6 Is the data testable by repeating it?L7 How might it have been manipulated to influence the conclusion?

L7 If this experiment was to be repeated on a large scale in the woods, which scientists

would need to be involved? What information or skills would they each contribute?


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An organism that lives in

or on another organism

(its host) and benefits by

deriving nutrients at thehost's expense.Scabies mite

Commonly known as the human itch mite,the parasite is transferred by physical

contact.

The female mite lays her eggs on the skin of

a human, causing inflammation.


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ICT TASK.

Using the internet

find out what

problems these

parasites might

cause this

unfortunate dog.

What precautions or

treatments might a

vet give to Fido?


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Using a microscope Sir

David Bruce (1855-1931) discoveredtrypanosomes in theblood of cows that had

sleeping sickness. Heinjected blood from sickanimals into healthyanimals.

The healthy animals gotsleeping sickness. Hethought that cows madethe parasite in their

blood.

1. For how long did Sir David

live?2. Why could scientists not

look at trypanosomes in

1555?

3. Name a medicalprocedure in this text.

4. Identify a theory in the

text.

5. Name a disease in the

text.

6. State a process that might

be thought unethical.

Cont


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He later discoveredthat some humans got

sleeping sickness butthey had not beennear any cows. Hediscovered that bothcows and humans withsleeping sickness hadbeen bitten by tsetse

flies; which hededuced carriedtrypanosomestheparasites that caused

sleeping sickness.

A. Apart from having the

disease, whats the link

between humans andcows?

B. Which organism transfers

the parasite?

C. What causes sleeping

sickness?

D. Trypanosomes and tsetse

flies are differentorganisms. Explain how the

fly could bite you but you

dont get sleeping sickness.

Cont..


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By the end of this bit you must

Draw and explain food webs and

chains Recall the words that describe

organisms in a food web. For

example, predator, producer orherbivore.

7Ce Links and chains


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This is a very simple food chain. The Sun passes onenergy for the grass to grow; the grass is eaten by the

vole and the owl eats the vole.

The arrows show the direction that energy travels

through the food chain.


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This is a food web. The

grass, the vole and the

owlare still there in a

chain, but this webshows how they interact

which other organisms.

Draw 4 different food

chains from this 1 food

web. They will all begin

with the producer .

Explain the arrows.


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Who is who in a food web?

Secondary

consumers

(Carnivores)

are eaten by and

pass energy to

tertiary

consumers

Primary

consumers

(Herbivores)

are eaten by and

pass energy to

secondary

consumers

Producers(Plants)

are eaten by andpass energy to

primaryconsumers

Look at the food web and answer the following questions;

1. What is the difference between a primary carnivore and a

secondary carnivore?2. Who is the top predator in the food web?

3. What might happen to the population of rabbits if the owl

population halved?

E

NE

R

GY


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These are owl pellets.Owls cant digest most of

what they eat; like

bones, hair, teeth etc.

Owls wrap up these

parts and bring them

back through their

mouth. We could find

out what the diet of the

owl was by identifying

the bones.


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http://www.hometrainingtools.com/owl-

pellet-dissection-project/a/1244/

http://www.biologycorner.com/resources/

Owl_Pellet_Bone_Chart_grid.pdf

http://www.obdk.com/pdf/DissectionLab.pdf
http://www.hometrainingtools.com/owl-pellet-dissection-project/a/1244/http://www.hometrainingtools.com/owl-pellet-dissection-project/a/1244/http://www.biologycorner.com/resources/Owl_Pellet_Bone_Chart_grid.pdfhttp://www.biologycorner.com/resources/Owl_Pellet_Bone_Chart_grid.pdfhttp://www.obdk.com/pdf/DissectionLab.pdfhttp://www.obdk.com/pdf/DissectionLab.pdfhttp://www.biologycorner.com/resources/Owl_Pellet_Bone_Chart_grid.pdfhttp://www.biologycorner.com/resources/Owl_Pellet_Bone_Chart_grid.pdfhttp://www.hometrainingtools.com/owl-pellet-dissection-project/a/1244/http://www.hometrainingtools.com/owl-pellet-dissection-project/a/1244/http://www.hometrainingtools.com/owl-pellet-dissection-project/a/1244/http://www.hometrainingtools.com/owl-pellet-dissection-project/a/1244/http://www.hometrainingtools.com/owl-pellet-dissection-project/a/1244/http://www.hometrainingtools.com/owl-pellet-dissection-project/a/1244/http://www.hometrainingtools.com/owl-pellet-dissection-project/a/1244/


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Ecologists are

scientists who are

often called in to

survey a habitat. Afarmer, for example,

might want to know

what would happen to

his wheat crop if he

killed all the field mice.

Field mice eat a lot of

wheat in a season.

It might seem obvious for the

farmer to kill the mice. This would

surely mean his wheat crop would

be safe from nibbling mice.However, the field mice are in a

food web or chain. Their demise

would mean other organisms

would be affected organisms

that might be very important to

the overall ecosystem


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7Ca Environmental Impact