Fill in the blanks.- A place where animals are protected in their natural habitat is called ____ .
- Species found only in a particular area is known as ____ .
- Migratory birds fly to far away places because of ____ changes.
- A place where animals are protected in their natural habitat is called ____ .
- Species found only in a particular area is known as ____ .
- Migratory birds fly to far away places because of ____ changes.
Solution and Explanation
(a) A place where animals are protected in their natural habitat is called a sanctuary.
(b) Species found only in a particular area are known as endemic.
(c) Migratory birds fly to far away places because of climatic changes.
Top CBSE Class VIII Science Questions
Select the correct word from the following list and fill in the blanks.
float, water, crop, nutrients, preparation- The same kind of plants grown and cultivated on a large scale at a place is called ____.
- The first step before growing crops is ____ of the soil.
- Damaged seeds would ____ on top of water.
- For growing a crop, sufficient sunlight and ____ and ____ from the soil are essential.
- List conditions under which combustion can take place.
- Match items in column A with those in column B.
A B (i) Kharif crops (a) Food for cattle (ii) Rabi crops (b) Urea and super phosphate (iii) Chemical fertilizers (c) Animal excreta, cow dung urine and plant waste (iv) Organic manure (d) Wheat, gram, pea (e) Paddy and maize - Fill in the blanks:
- Burning of wood and coal causes ___ of air.
- A liquid fuel, used in homes is ___.
- Fuel must be heated to its ___ ___ before it starts burning.
- Fire produced by oil cannot be controlled by ___.
- Explain how the use of CNG in automobiles has reduced pollution in our cities.
Top CBSE Class VIII Questions
- Solve the following equation and check your result: \(3x = 2x + 18\)
- Solve and check result: \(5t - 3 = 3t - 5\)
- Solve and check result: \(5x + 9 = 5 + 3x\)
- Solve and check result: \(4z + 3 = 6 + 2z\)
- Solve and check result: \(2x - 1 = 14 - x\)
Concepts Used:
Biodiversity and Conservation
The term ‘biodiversity’ is derived from the two words- ‘bios' which means life and ‘diversity’ i.e, differentiation or variation. Edward Wilson, the sociobiologist was the first to popularise the term ‘biodiversity’ in the year 1992. The term implies the occurrence of various plants and animals along with their variants such as biotypes, ecotypes and genes on earth. In our biosphere, the immense diversity or heterogeneity remains not only at the species level but also, at every level of biological organization that ranges from macromolecules in the cells to biomes.
Biodiversity and Conservation is a topic covered under the fifteenth chapter and Unit 5 of NCERT class 12 biology.