Envi scie (3) Flashcards
1
Q
- focuses on how organisms interact with one another and with their nonliving environment of matter and energy
- Its major focus is the study of the ecosystem.
A
Ecology
2
Q
- community of organisms that interact with each other and non living components for sustainable development
- If we combine all the ecosystems present on earth, it is called Biosphere.
A
Ecosystem
3
Q
Ecosystems are divided into
A
terrestrial or land-based ecosystems, and aquatic ecosystems in water.
4
Q
Classification of ecosystem
A
Artificial Ecosystem, Natural Ecosystem,
5
Q
maintained of created artificially by man,
A
Artificial Ecosystem
6
Q
Natural Ecosystem
A
- ecosystems operate by themselves under natural conditions without any major interference by man.
- It consists of Terrestrial and Aquatic Ecosystems which are maintained naturally.
7
Q
Components of an ecosystem
A
Non Living components
Living component
8
Q
- physical and chemical factors that directly or indirectly affect the living components e.g. air, water, land, rock etc
- Physical factors include sunlight, water, fire, soil, air, temperature etc
- Chemical factors include moisture, salinity of water, soil nutrients, oxygen dissolved in water etc.
A
Non Living Components (Abiotic
9
Q
- either producers or consumers
- . Producers can produce organic components e.g. plants can produce starch, carbohydrates, cellulose from a process called photosynthesis.
- Consumers are the components that are dependent on producers for their food e.g. human beings and animals.
A
Living Components (Biotic)
10
Q
Biotic Components
A
Producer
Consumer
Decomposers
11
Q
- The green plants have chlorophyll with the help of which they trap solar energy and change it into chemical energy of carbohydrates using simple inorganic compound namely, water and carbon dioxide. This process is known as photosynthesis.
A
Producer
12
Q
Two categories of biotic based on their food
A
Photoautotrophs, chemotrophs
13
Q
- capable of synthesizing its own food from inorganic substances using light as an energy source.
- Green plants and photosynthetic bacteria
- .
A
Photoautotrophs
14
Q
- Organisms that obtain energy by the oxidation of electron donors in their environments
A
Chemotrophs
15
Q
- they depend on the producers for their food.
- They are known as heterotrophs (i.e. heteros= others, trophs= feeder).
A
Consumers
