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Chapter 4
Chapter 4
Chapter 4
Chapter 4
Chapter 4
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Chapter 4


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  • 1. 1 ©Gabriel Chua, 2013Chapter 4: Interdependence Among Living Organisms and Environment4.1) Interdependence Among Living Organisms1. Species is a group of _______________ living organisms who can ____________ togetherto produce ______________ offsprings.2. Population is a group of individuals of the same _____________ living in the same_____________ at the same time.3. Community is when different ________________ of organisms living together and________________ with one another in the same habitat.4. Ecosystem is when different __________________ interact with one another and with_________________.5. Habitat is the natural _____________ ____________ of organisms. It provides food,_______________, ______________, _______________ and ______________.6. Environment is made up of _______________ and _____-_______________ organisms.4.2) Interactions Between Living Organisms1. Interactions Between Living Organisms_______________________ ______________ is theanimal that hunts otherorganisms for food ______________ is theanimal that are hunted bypredators Predators usually havespecial characteristicssuch as sharp claws orbeak to kill Prey can runs fast toescape from predators. Eg:____________________________________________________________________________________________________ _____________ between2 organisms Divided into:a) Commensalism 1 benefits whileanother ___________ Eg:_______________________________b) Mutualism _________ benefits Eg:_______________________________c) Parasitism 1 benefits whileanother ___________ Eg:______________________________________________________ Occurs when organismscompete for the same____________________ Animals compete for_________, __________,___________ ________and ___________ Plants compete for_________, __________,___________ ________and _____________
  • 2. 2 ©Gabriel Chua, 20132. Biological control The use of ________________ ________________ to control the population of pests. Eg: __________________________________________________________________ Advantages:a) Does not ____________ other organismsb) Does not ____________ environmentc) Safe and cheap4.3) Food Web1. Food chain is the _________ ______________ among organisms.2. Food web consists of several ____________ _______________ that are interlinked to oneanother.3. Producers are living organisms that are able to ______________ their own food.4. Consumers are living organisms that are not able to make their own food. They get foodfrom by _________________ on other organisms.5. Build your own food chain from the following organisms:6. Build your own food web from the following organisms:Snake, frog, owl, grass, grasshopper, decomposersSnake, frog, owl, grass, grasshopper, decomposers, small bird, caterpillar, rabbit
  • 3. 3 ©Gabriel Chua, 20137. Pyramid of numbers show the _____________ of organisms at each stage of food chain.4.4) Photosynthesis1. Occurs in ___________ ____________ only.2. It is the process of making own _____________ from ______________, _____________,_____________ _______________ and ______________.3. The process of photosynthesis:4. Glucose is converted into ___________________5. Role of photosynthesis:a) Enable plants to make their own ____________b) Regulate and maintain ________________ _______________ content in atmospherec) Increase ______________ content in atmosphere6.From the base to the peak:a) Number of organisms __________________b) Size of organisms _____________________c) More energy is ______________Carbon cycle
  • 4. 4 ©Gabriel Chua, 20137. Process that releases carbon dioxide are ___________________, __________________and _______________________8. Process that absorbs carbon dioxide is _______________________.4.5) Conservation and Preservation of Living Organisms1. Conservation is the action of ______________ plants and animals from being killed ordestroyed.2. Preservation is the action of _______________ living organisms the way they are.3. Steps taken to conserve and preserve living organisms:Steps ExplanationsSetting up protected areasSetting up man-made habitatsLaws and regulationsRecycling and reusingmaterialsBanning trade of exotic petsBanning sales of productsmade from endangeredorganismsConservation andpreservation activities4.6) Role of Humans in Maintaining the Balance in Nature1. Some effects of human activities on nature are ____________________ of resources,______ pollution, ___________ pollution and ____________ pollution.2. Solving pollution:Parties involved ExplanationIndividualCommunityGovernment
  • 5. 5 ©Gabriel Chua, 2013