Description : Why are gases deposits found on top of oil deposit?
Last Answer : Ans: Gas deposits collect above the oil because they are less dense.
Description : Explain how fossil fuel cause air pollution.
Last Answer : Ans: When fossil fuels are burnt they produce harmful substances that cause air pollution and, in turn harm the environment.
Description : Give three uses for oil products.
Last Answer : Ans: Oil products are used in vehicles, for heating homes and in power stations.
Description : Suggest a good place to establish a wind farm.
Last Answer : Ans: b) A good place to establish a wind farm would be a windy location on land or out at sea.
Description : What is the wind farm?
Last Answer : Ans: a) A wind farm has a large number of wind turbines in one place.
Description : What is the main problem with wind power?
Last Answer : Ans: The energy produced by wind is difficult to store, and electricity is only produced when the turbines are rotating.
Description : Give two examples of renewable energy sources.
Last Answer : b) The Sun, wind, and tides.
Description : What is a renewable energy source?
Last Answer : Ans: a) A renewable energy source is a natural energy source which can supply energy for millions of years without becoming exhausted.
Description : Explain how global warming can lead to the flooding of low lying areas.
Last Answer : Global warming will cause the ice caps at the Poles to melt which in turn will cause the sea level to rise, thus causing a change in weather patterns: more flooding will occur in the lowlying parts of the world.
Description : What is a global warming?
Last Answer : Ans: a) An increase in the amount of carbon dioxide in the air is increasing the greenhouse effect, which is causing the temperature of the Earth to rise. This is global warming.
Description : Name one other green house gas.
Last Answer : methane
Description : Explain why carbon dioxide is called a green house gas.
Last Answer : Ans: a) Similar to a greenhouse, carbon dioxide is very good at keeping heat within the Earth’s atmosphere. This is why it is called a greenhouse gas. It has been very useful in making the Earth warm enough for human life to survive.
Description : What happen to the heat energy that reaches Earth from the sun?
Last Answer : Ans: The layer of air which surrounds the Earth acts as an insulating layer. Carbon dioxide gas in the atmosphere absorbs the heat from the Sun and keeps it in thereby maintaining a specific temperature for life on Earth.
Description : What does porous mean?
Last Answer : Ans: Porous means something having sponge-like holes through which liquid or gas can seep.
Description : a) What does crude oil look like? b) Explain why crude oil is a fossil fuel.
Last Answer : a) Crude oil is thick and black. b) Crude oil is a fossil fuel because it was made from the dead bodies of microscopic plants and animals that once lived in the sea.
Description : Suggest why there are no human fossil in coal.
Last Answer : Ans: There were no human beings living on the Earth at that time.
Description : What is a fossil fuel?
Last Answer : Ans: A fossil fuel is formed from the remains of living things. Coal, oil, and natural gas are fossil fuels.
Description : List five common fuels that could be used in the home
Last Answer : Ans: coal, natural gas, kerosene oil, wood, charcoal
Description : Give the meaning of the following words a) combustion b) ignition
Last Answer : a) The chemical reaction which takes place when a fuel reacts with oxygen to give out thermal energy (heat) is called combustion. b) The small amount of energy needed to light a fuel is called ignition.
Description : Where most of the world’s energy does comes from?
Last Answer : Ans: Most of the world’s energy comes from burning fuels.
Description : What is the main cause for the production of the gases that produce acid rain?
Last Answer : Need answer
Description : An inorganic iodide (A) on heating gives gases (B) and (C). (B) is neutral towards litmus while (C) is acidic (B) gives back dense white fumes of (A)
Last Answer : An inorganic iodide (A) on heating gives gases (B) and (C). (B) is neutral towards litmus while ( ... . is used as a dehydrating agent D. All of these
Last Answer : An inorganic iodide (A) on heating gives gases (B) and (C). (B) is neutral towards litmus while (C) ... with `BF_(3)` D. It can act as oxidising agent
Last Answer : An inorganic iodide (A) on heating gives gases (B) and (C). (B) is neutral towards litmus while (C) ... three series of salts D. Both (B) and (C)
Description : Which is not an effect of acidic rain in a pond
Last Answer : Which is not an effect of acidic rain in a pond A. Increased fungal growth B. Decreased insect population C ... D. `NO_(3) and SO_(4)` saturation.
Description : Normal rain water is slightly acidic with a pH of about
Last Answer : Ans. 5.6
Description : Why normal rain is slightly acidic? A. due to presence of dust in air B. carbon dioxide and water in clouds react to form carbonic acid (Answer) C. Ozone depletion D. All of these
Last Answer : B. carbon dioxide and water in clouds react to form carbonic acid (Answer)
Description : The pH of acidic rain is a) Below 7 b) Below 6 c) Below 5.6 d) Above 7
Last Answer : c) Below 5.6
Description : Oceans act as sinks for atmospheric gases including carbon dioxide whose concentration in the atmosphere is increased by the (A) Forestation (B) Rain (C) Green house effect (D) Vegetation
Last Answer : (C) Green house effect
Description : Sulphur dioxide present in the industrial chimney exhaust gases causes (A) Respiratory & lung disease (B) Reduction in plant's productivity owing to acid rain (C) Corrosion of building materials (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Pick up the correct statement from the following: (A) The precipitation during its travel in atmosphere dissolves certain gases (B) Rain water which percolates through the ground, is free from ... water may dissolve minerals and salts present in the earth's layers (D) All the above
Last Answer : (D) All the above
Description : The Kyoto Protocol is for a. limiting Green house gases b. Ozone depleting substance c. Reducing acid rain d. None of the above
Last Answer : a. limiting Green house gases
Description : My air conditioning motor broke. The repairman told me propane gas was more acidic than natural gas and was the cause of the breakdown. Is this true?
Last Answer : Propane gas is more acidic then natural gas, and could of caused the breakdown but propane is also cheaper then natural gas and lasts longer. Natural gas is also considered the "greener" choice.
Description : Pick out the false statement pertaining to water treatment. (A) Aeration of water is effective in CO2 removal (B) The zeolite water softening process reduces the hardness of water by not more than 50% (C ... carbonate do not cause hardness in water (D) Water with pH value less than 7, is acidic
Last Answer : (B) The zeolite water softening process reduces the hardness of water by not more than 50%
Description : Pick up the correct statement from the following: (A) Deposition of calcium carbonate on the inside of the well pipe, causes incrustation of the pipe (B) Incrustation of the pipe reduces the discharge (C) Acidic waters cause corrosion of the pipes (D) All the above
Description : Which one of the following statements concerning glutamine is correct? (A) Contains three tetratable groups (B) Is classified as an acidic amino acid (C) Contains an amide group (D) Migrates to the cathode during electrophoresis at pH 7.0
Last Answer : Answer : C
Description : Could the rise in the average temperature of the globe cause an increase in greenhouse gases' density?
Last Answer : answer:It certainly seems counterintuitive to me unless. At higher temperatures it would seem the gasses would be less dense, not more. Rising temperatures will also tilt the greenhouse gas mix more toward ... . If you can buttonhole him at some point, ask him to explain his thinking on that.
Description : How does the presence of greenhouse gases cause golbal warming -Geography
Last Answer : There are five gases of human origin that contribute most - together up to 95% of the total - to the increase in global warming. Here you will discover the source of their emission, the time they spend ... use and is also given off from waste tips. It lasts an average of 12 years in the atmosphere.
Description : Mixture of which pair of gases is the cause of occurrence of most of the explosions in mines? -Do You Know?
Last Answer : answer:
Description : Which of the following pairs of gases are the major cause of "Greenhouse effect"?
Last Answer : Which of the following pairs of gases are the major cause of "Greenhouse effect"? A. `CO_(2) and N_(2)O` B. ... . `CO_(2) and CO` D. `CFCs and SO_(2)`
Description : The main cause of global climatic change is – (1) increase in the content of carbon dioxide in the atmosphere (2) emissions of industrial gases (3) adding of dust (4) changes in plant cover
Last Answer : (1) increase in the content of carbon dioxide in the atmosphere Explanation: Our ever increasing addiction to electricity from coal burning power plants eleases enormous amounts of carbon dioxide ... sources, we are highly dependent on burning coal for our personal and commercial electrical supply.
Description : Mixture of which pair of gases is the cause of occurrence of most of the explosions in mines?
Last Answer : Methane and air
Description : Gases which cause fading the colour of silver ornaments are?
Last Answer : Hydrogen Sulphide & Sulphur dioxide
Description : Pick out the wrong statement. (A) Addition of methane to the furnace atmosphere reduces decarburising by hydrogen (B) Nitrogen in presence of steam decor-burises high carbon steel, whereas hydrocarbon ... the metal surface) cause nitride formation with increase in surface hardness (D) None of these
Last Answer : (D) None of these
Description : Which of the following gases cause global warming? (A) Carbon monoxide (B) Carbon dioxide (C) Nitrogen (D) Ozone
Last Answer : (B) Carbon dioxide
Description : What force between molecules tends to cause most common gases to behave as non-ideal gases? w) Van der Waals' force x) ionic bonding force y) gravitational force z) covalent bonding force
Last Answer : ANSWER: W -- VAN DER WAALS' FORCE
Description : Who was the first scientist credited with pointing out that certain gases could cause a greenhouse effect? w) John Tyndall x) Charles Darwin y) Roger Tory Peterson z) Stephen Jay Gould
Last Answer : ANSWER: W -- JOHN TYNDALL