chapter 4

Interactions Between Living Organisms

_____________________________________ is the animal that hunts other organisms for food______________ is the animal that are hunted by predatorsPredators usually have special characteristics such as sharp claws or beak to killPrey can runs fast to escape from predators.Eg:_____________________________________________________________________________

____________________________________ between 2 organismsDivided into:Commensalism1 benefits while another ___________Eg:_______________________________

Mutualism_________ benefitsEg:_______________________________

Parasitism1 benefits while another ___________Eg:_______________________________

_______________________Occurs when organisms compete for the same ____________________Animals compete for _________, __________, ___________ ________ and ___________Plants compete for _________, __________, ___________ ________ and _____________

Chapter 4: Interdependence Among Living Organisms and Environment

4.1) Interdependence Among Living Organisms

1. Species is a group of _______________ living organisms who can ____________ together

to 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 Organisms

1.

1 ©Gabriel Chua, 2013

2. Biological control

The use of ________________ ________________ to control the population of pests.

Eg: __________________________________________________________________

Advantages:

a) Does not ____________ other organisms

b) Does not ____________ environment

c) Safe and cheap

4.3) Food Web

1. Food chain is the _________ ______________ among organisms.

2. Food web consists of several ____________ _______________ that are interlinked to one

another.

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 food

from 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, decomposers

Snake, frog, owl, grass, grasshopper, decomposers, small bird, caterpillar, rabbit

From the base to the peak:Number of organisms __________________Size of organisms _____________________More energy is ______________

Carbon cycle

7. Pyramid of numbers show the _____________ of organisms at each stage of food chain.

4.4) Photosynthesis

1. 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 atmosphere

c) Increase ______________ content in atmosphere

6.


7. Process that releases carbon dioxide are ___________________, __________________

and _______________________

8. Process that absorbs carbon dioxide is _______________________.

4.5) Conservation and Preservation of Living Organisms

1. Conservation is the action of ______________ plants and animals from being killed or

destroyed.

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 areas

Setting up man-made habitats

Laws and regulations

Recycling and reusing materials

Banning trade of exotic pets

Banning sales of products made from endangered organismsConservation and preservation activities

4.6) Role of Humans in Maintaining the Balance in Nature

1. Some effects of human activities on nature are ____________________ of resources,

______ pollution, ___________ pollution and ____________ pollution.

2. Solving pollution:

Parties involved ExplanationIndividual

Community


Government


chapter 4

Technology