Human intervention in ecosystems - class-VIII

human intervention in ecosystems

17 Questions Published

Questions

Question 1 Multiple Choice (Single Answer)

An increase in albedo would be accompanied by ___________ in radiative equilibrium temperature.

  1. An increase
  2. A decrease
  3. No change
  4. Unstable oscillations
Question 2 Multiple Choice (Single Answer)

Good urban planning is essential for _____________ land use.

  1. Rational
  2. Irrational
  3. Planned
  4. Unplanned
Question 3 Multiple Choice (Single Answer)

______________ ecosystems are maintained artificially by man.

  1. Man-made
  2. Marine
  3. Artificial
  4. Brackish
Question 4 Multiple Choice (Single Answer)

Which is not a component of human socio-cultural environment?

  1. Land
  2. Religion
  3. Community
  4. Caste
Question 5 Multiple Choice (Single Answer)

Metallic pollutants released by automobiles that use leaded fuel is

  1. Arsenic
  2. Cadmium
  3. Lead
  4. Mercury
Question 6 Multiple Choice (Single Answer)

What are man-made sources of acid rain?

  1. Exhaust from vehicles
  2. Burning fuels
  3. Isoprene emissions
  4. All of above
Question 7 Multiple Choice (Single Answer)

In humans, nitrates causes blood disease and

  1. Gastric cancer
  2. Bladder infection
  3. Skin infection
  4. Lung disease
Question 8 Multiple Choice (Single Answer)

The largest store of carbon molecules on earth is in

  1. The atmosphere
  2. Fossil fuels
  3. Marine sediments
  4. Living organisms
Question 9 Multiple Choice (Single Answer)

What is auxiliary energy in man subsidized solar powered ecosystem?

  1. Man and Machine
  2. wind and Rain
  3. Organic matter
  4. Nutrient cycle
Question 10 Multiple Choice (Single Answer)

Public awareness of environment creates _____________

  1. Environment protection
  2. Environment degradation
  3. Environmental improvement
  4. Environmental cultivation
Question 11 Multiple Choice (Single Answer)

Vulcanisation of Rubber is carried out to make it

  1. Soft
  2. Elastic
  3. Resistant to temperature changes
  4. Hard and inelastic
Question 12 Multiple Choice (Single Answer)

Choose the correct answers from the alternatives given.
Most of biological diversity has probably arisen by:

  1. anagenesis
  2. cladogenesis
  3. sympatric speciation
  4. phyletic evolution
Question 13 Multiple Choice (Single Answer)

High concentration of $SO _{2}$, $NO _{2}$, $CO _{2}$, SPM in atmosphere, causes threats to

  1. Human health
  2. Environment
  3. Plants
  4. Soil
Question 14 Multiple Choice (Single Answer)

State whether the following statements are true or false.
Human intervention in natural community interactions usually makes the community more stable 

  1. True
  2. False
Question 15 Multiple Choice (Single Answer)

Clinkers can be used as aggregate: concrete and

  1. Road Materials
  2. Furnitures
  3. Farms
  4. Food
Question 16 Multiple Choice (Single Answer)

Which ecosystem is very important for man to produce food and fiber?

  1. Man subsidized solar power ecosystem
  2. Unsubsidized natural solar powered ecosystem
  3. Naturally subsidized solar powered ecosystem
  4. Fuel power ecosystem
Question 17 Multiple Choice (Single Answer)

Global warming could cause a rise in the sea level because

  1. Oceans expand as they get warmer
  2. Glaciers and ice-sheets melt
  3. Both of the above
  4. None of these