Test: Natural Resources - CTET & State TET MCQ

Wooden door, windows and chair are made of timber obtained from forest while polythene is manmade product.

Well is underground source of water while river, lake and sea are surface source of water.

The major part of air (which does not support burning candle) is nitrogen.

Air is a mixture of a number of gases like Nitrogen, Oxygen and Carbon dioxide etc.

The purest form of water is rain water as no impurities is present in it.But when it comes to earth, the gases present in the atmosphere gets mixed with it and hence makes it impure but rainwater is pure when it fells from clouds.

Water has dissolved air. When the water is heated, the air within it begins to escape, resulting in the formation of bubbles.

The blowing wind makes the windmill to rotate.

• The energy in which wind is used to generate electricity is known as wind energy.
• Wind turbines convert the kinetic energy in the wind into mechanical power.
• This mechanical power is then used for various purposes.
• Wind energy is a free and renewable resource. It is a clean and non-polluting source of energy.

Microorganisms act upon the dead plants to produce humus the increase the fertility of soil.

Water is the only substance, which is found in all three states in nature.

Kerosene is derived from petroleum and is a combustible hydro-carbon in liquid state. It is not derived from forests and so is not a forest product.

Forest products are materials that are derived from forests and forestry either for direct consumption or for commercial use. Gum, plywood and sealing wax are all obtained from forests for different purposes and so are categorized as forest products.

The gaseous state of water is vapour form by evaporation or boiling the water.

mushrooms and other micro-organisms feed on dead plant and animal tissues, playing a significant role in decomposing organic matter and recycling nutrients in the ecosystem. They do not feed on living animals, sunlight, or use water as a primary nutrient source. 

The burning of fossil fuels - like coal, oil and natural gas - releases gases into the air, mainly carbon-dioxide, sulfur dioxide, methane and nitrous oxide.

By volume, dry air contains 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, and small amounts of other gases.

The process of changing water into water vapour is called condensation.

Air is all around us, a thick layer of air surrounds the earth, this blanket of air is called atmosphere.

Rain is also known as precipitation.

Mountaineers carry Oxygen cylinder with them, while climbing mountains because air pressure is low at higher altitude.

The thick envelop of air around the earth is called atmosphere, which contain nitrogen and oxygen gas mainly.

 (d) all of these

Medicine, furniture and paper are obtained from plants but petrol is obtained from petroleum.

• Preventing dust storms: Trees and vegetation act as barriers that help reduce the speed and impact of winds, preventing the blowing of dust and sand which can cause dust storms.


• Preventing soil erosion: Trees and vegetation help hold the soil in place with their roots, preventing erosion caused by wind. This is crucial for maintaining fertile soil for agriculture and preventing landslides.


• Regulating oxygen and carbon dioxide levels: Trees play a vital role in the carbon cycle by absorbing carbon dioxide during photosynthesis and releasing oxygen. This helps maintain a balance in the levels of these gases in the atmosphere.


• Promoting biodiversity: Trees and vegetation provide habitats for a variety of wildlife, contributing to biodiversity and ecosystem health.


• Improving air quality: Trees help filter pollutants from the air, improving air quality and creating a healthier environment for humans and animals.

Mountain appears green due to presence of plants on it in form of herb, shrub and tree.

Transpiration is the process by which moisture is carried through plants from roots to small pores on the underside of leaves, where it changes to vapor and is released to the atmosphere. Transpiration is essentially evaporation of water from plant leaves. Transpiration also cools plants, changes osmotic pressure of cells and enables mass flow of mineral nutrients and water from roots to shoots.
Therefore, the correct answer is option A.

Plants convert CO₂ into O₂ during photosynthesis. Exchange of gases takes place through stomata.

A weather cock shows the direction in which wind is blowing.

Water is a compound consisting of hydrogen and oxygen in fixed ratio.

Humus is found in the top layer of the soil.

Water is not blue in colour.

Water is colorless because all light (except tiny bit of blue) is reflected back. 

The process of eating and being eaten is called as food chain to transfer energy from one organism to other organism.