Natural Resourc...

Hydroponics is

Minamata disease is due to:

The presence of which of the following causes algal bloom?

Coal is a fossil fuel and it cannot be prepared in a laboratory or industry because the formation of coal

a. is a very slow process
b. needs very low pressure and low temperature
c. needs very high temperature and pressure
d. causes air pollution

Select the correct alternative:

Which of the following statements is/are correct?

a. Most of the water found on Earth's surface is saline.
b. Fresh water is only found frozen in the ice caps at the two Poles and on snow-covered mountains.
c. All cellular processes take place in a water medium.

CFCs cause

An increase in the percentage of gases, which prevents the escape of heat from the Earth, in the atmosphere would cause the average temperatures to increase worldwide average temperatures to increase worldwide and this is called ________.

Match the following:

Water pollution is caused by

(i) fertilisers
(ii) petroleum oil
(iii) pesticides

Which of the following is/are the effect(s) of air pollution on human beings?

(i) Hydrocarbon vapours damage the internal organs and cause cancer.
(ii) Suspended particulate matter causes asthma, bronchitis and allergic cold.
(iii) Pollutant gases cause irritation in eyes, throat and lungs along with injuring lungs, liver, kidneys, spleen and nervous system.

Which of the following factors control(s) phenomena like windstorms, cyclones, thunderstorms, etc?

Which of the following statements is/are correct?

(i) Oxygen constitutes up to 95-97% of the atmosphere on Venus and Mars.
(ii) Green plants fix carbon dioxide.
(iii) Many marine animals use carbonates dissolved in seawater to breathe.

Which of the following is the region of the atmosphere where air is subject to differential heating?

________ particles act as 'nucleus' to support rain drops.

What happens to the air as it rises up?

1. It expands.
2. It cools.
3. It heats up.
4. It contracts.
Choose the correct answer from the options given below.

The term 'denitrification' means

Which of the following is a logical sequence in carbon cycle?

Excessive exposure of humans to UV rays results in

(i) damage to immune system
(ii) damage to lungs
(iii) skin cancer
(iv) peptic ulcers

Which of the following processes converts atmospheric carbon into glucose molecules?

The shells of many aquatic animals are made up of