This sub-strand deals with the ecosystem. Life of an organism depends on other organisms and their physical environment. Success of organisms in the environment depends on how well an organism is adapted to the environment. Many organisms have developed over time many features that allow them to survive successfully in their environment. In an ecosystem, food is the source of nutrients to organism. Nutrients pass from organism to the other through the food chain.
7.12.1.1 identify examples of local ecosystems in your community eg; mangrove, forest, river, coral reef and ocean 7.12.1.2 identify examples of other ecosystems example; deserts and grassland 7.12.1.3 give an example of an organism interacting with:
i. a living things a. a cow feeds on a grass b. birds nesting in branches of the mangrove trees
ii. non-living things a. fish breath air in water b. chicken drinks water
7.12.3.1 give common examples of organism, and identify abiotic factors that influence their survival. i. mangrove tree- salinity, nutrients, ii. bonito- ocean, salt water, temperature iii. hard coral- sunlight, algae, current iii. mosquito – water, air
7.12.4.1 draw and describe food- chains and food-webs in the following ecosystems; mangrove, coral reef, deep-sea, and rain forest 7.12.4.2 identify the origin of the energy and describe the energy flow in the food chain or food web