· web viewkey word bank/examples of animals, cut and stick activity for la. for food web- use...
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Science Home learning
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Lesson Title: Food Chains and Food WebsYear: 7
Topic: Interdependence and Plant ReproductionUnit:
Staff members: Mr. S Guy
Date Set: 01/01/2021
Information to read / watch:
https://classroom.thenational.academy/lessons/food-chains-and-webs-64uk4e
Application:
Objective: Recall what a food chain/ food web is and name the key parts
Task: Create a food chain with a minimum of 4 parts and then develop a food web using the animals from the food chain created (above). Label keywords.
Scaffolding: Key word bank/examples of animals, cut and stick activity for LA. For food web- use food web ‘clues’ to help develop food web, cut and stick activity
Objective: Interpret key features of food chains/webs from given example.
Task: Complete exam style questions with arctic food web.
Scaffolding: Sentence stems if necessary.
Objective: Suggest how humans can have a negative impact on the food chain
Task: Discuss human influence on food chains and animal populations. Complete exam style questions about over fishing.
Scaffolding: Key words
Challenge: Suggest why there is such strict quarantine rules for animals brought into the country from other countries
Scaffolding: Table of information about intrusive animal/plant species. Sentence stems.
Misconceptions:
Additional Websites:
https://classroom.thenational.academy/lessons/impacts-on-food-webs-69j3et
Objective: Recall what a food chain/ food web is and name the key parts
Task: Create a food chain with a minimum of 4 parts and then develop a food web using the animals from the food chain created (above). Label keywords.
T ask 2- Develop a food web using the ‘food web clues’.
Objective: Interpret key features of food chains/webs from given example.
Task: Complete exam style questions with arctic food web.
Objective: Suggest how humans can have a negative impact on the food chain
Task: Discuss human influence on food chains and animal populations. Complete exam style questions about over fishing.
Scaffolding: Key words
The drawing below shows part of a food web in the sea around Antarctica.
(a) From the food web, give the names of two animals that only eat krill.
1. ....................................................................................................................
1 mark
2. ....................................................................................................................
1 mark
(b) (i) Which word describes the plants in a food web?Tick the correct box.
producers predators
herbivores carnivores
1 mark
(ii) Krill are small animals that eat tiny plants.
Which word describes krill in the food web?Tick the correct box.
producers predators
herbivores carnivores
1 mark
(c) (i) Crabeater seals eat krill.Fishermen catch large amounts of krill from the sea.
How would a decrease in the number of krill affect the number of crabeaterseals?
...............................................................................................................
...............................................................................................................
1 mark
(ii) Look at the food web.Leopard seals also eat krill.
A decrease in the number of krill will affect the crabeater seals sooner thanit affects leopard seals.Give the reason for this.
...............................................................................................................
...............................................................................................................
1 mark
maximum 6 marks
Challenge: Suggest why there is such strict quarantine rules for animals brought into the country from other countries
Scaffolding: Table of information about intrusive animal/plant species. Sentence stems.
Originally a native of North America, grey squirrels were deliberately released into the wild in Great Britain in 1876, and carry a pox virus to which our native red squirrel is very susceptible.
Red squirrels have now been wiped out across most of Great Britain, mainly through disease transmission, and now only a few populations remain in England and Wales. Fortunately, red squirrels still have a stronghold in Scotland and dedicated programmes are helping to ensure their conservation against the constant threat of the invasive red squirrel
Rhododendron was first introduced in 1763 from the Iberian Peninsula for use in gardens, and there are now few areas of Great Britain that are not affected by this invasive plant.
The rhododendron blocks light, preventing other species from growing beneath it and leaving only trees that are able to grow above the level of the rhododendron canopy. It also carries diseases which are fatal to some of our native trees.
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This American native has earned the reputation as one of the most harmful invasive amphibian species. Not only does it feed day and night on a wide range of prey, but also carries a disease that has led to worldwide amphibian decline and several global extinctions.
In the past bullfrogs have been kept as pets and deliberately released into the wild – it is advised not to release any unwanted pets as it could be bad for the animal and could harm native wildlife.
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This lobster-like freshwater species was introduced from America in 1975 to be farmed for food, but quickly escaped and spread rapidly through Great Britain.
Since its arrival it has driven the white-clawed crayfish towards extinction through competition and transmission of a crayfish plague, which doesn’t harm signal crayfish but is fatal to white-clawed crayfish. It also burrows into riverbanks leading to erosion and increasing flood risk.