- Ionosphere
- Ozone layer
- Troposphere
- Magnetosphere
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Directions : In each of the following questions a statement is given, followed by two conclusions. Give answer : Statement : "Use our product to improve memory of your child. It is based on natural herbs and has no harmful side effects." - An advertisement of a pharmaceutical company. Assumptions : I. People generally opt for a medical product which is useful and has no harmful side effects. II. Improving memory of child is considered as important by many parents.?
Answer: Option 5 An advertisement highlights only those features of a product, which are liked by people and are also desirable. So, both I and II are implicit.
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Light from the star, Alpha Centauri, which is nearest to the earth after the sun, reaches the earth in?
Answer: Option 3 Light from the nearest star reaches the earth in 4.2 years. The closest star to Earth are three stars in the Alpha Centauri system.
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Which layer of the earth's atmosphere reflect back the radio waves to the earth's surface ?
Answer: Option 1 Ionosphere reflect back the radio waves to the earth's surface.
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In the absence of ozone layer, which rays will enter into atmosphere?
Answer: Option 3 The ozone layer is a layer in Earth’s atmosphere containing relatively high concentrations of ozone (O3). The ozone layer absorbs 97–99% of the Sun’s medium frequency ultraviolet...
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The ozone layer is being destroyed by chlorofluorocarbons. In this regard which do you consider as the most harmful?
Answer: Option 3 The ozone layer is being destroyed by chlorofluorocarbons. In this regard Fluorine atom is considered as the most harmful. Chlorofluorocarbons (CFCs) could deplete Earth's atmospheric ozone layer,...
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The part of the earth and thin layer of air above its surface, which support life on earth, are referred to as?
Answer: Option 3 The part of the earth and thin layer of air above its surface, which support life on earth, are referred to as biosphere.
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A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of __________ high above earth's atmosphere, which absorbs it.?
Answer: Option 3 Let'
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Which of the following is/are correct in matching the layer of atmosphere and its characteristic I. Troposphere : weather phenomena II. Stratosphere : ozone layer III. Ionosphere : radio waves reflected to earth's surface IV. Mesosphere : Aurorae?
Answer: Option 4 The following that are correct in matching the layer of atmosphere and its characteristic are Troposphere : weather phenomena, Stratosphere : ozone layer and Ionosphere : radio...
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Which of the following are true regarding ionosphere I. It is the uppermost layer of atmosphere II. The molecules and atoms of nitrogen and oxygen in this layer absorb a part of solar radiation and become ionized III. This layer is responsible for reflecting back the radio wave transmitted from the earth?
Answer: Option 3 The following that are true regarding ionosphere are The molecules and atoms of nitrogen and oxygen in this layer absorb a part of solar radiation and become...
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Which of the following absorbs the insolation from the sun and preserves the earth's radiated heat, thus acting like a blanket allowing the earth neither to become too cold nor too hot?
Answer: Option 2 Water vapour absorbs parts of the insolation from sun and thus reduces its amount. It also preserves the earth's radiated heat. It thus acts like a blanket...
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