Homework on earthquakes What is an ecosystem? A natural system made up of plants, animals and the environment. Biotic are the living features and Abiotic are the non-living factors such as sunlight. Food Chains and Food Webs This shows the producers (plants) and the consumers (animals that eat the plants, and animals that eat other animals). The web is a bit more complex at showing the relationships. What are the impacts of change on an ecosystem? They can take hundreds of years to develop, for them to be sustained there needs to be balance. If just one component changes it affects all others. These changes can naturally are by humans. Homework on earthquakes Go through and highlight important information. Produce a revision card on the outline. Answer the Exam question Natural change could be lack of rain (drought) which would dry up a pond. Human activities include using fertilisers and pesticides. Deforestation which destroys the habitat and nutrient cycle. How can changes affect the pond ecosystem? The Perch will eat more of the smaller fish and small animals like frogs This reduces the amount of food for creatures further up the food chain, like herons With fewer frogs there will be an increase of other creatures below frogs in the food chains like slugs. Avington Park Lake Hampshire Restoration of the lake began in 2014. The aim was to improve the habitat for birds. They dug out silt and created new waterside habitats to attract nesting birds and waterfowl.

Using the sources examine how habitats can be affected by both natural and human impacts 6 marks ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ Marks 1-2 Basic sentences about ecosystems/habitats and impacts. Does not use very much evidence to support explanation Marks 3-4 Able to back up explanation with facts about the impacts Marks 5-6 Able to produce a well structured correct explanation using evidence to show impact on habitats