Some definitions are given below which can be corrected by changing one word. Correct them.
(a) Aquifer is groundwater stored between layers of hard rock above the water table.
(b) The process of evaporation of water in the ground is called infiltration.
(c) The evaporation of water from oceans and its arrival back into oceans is called vapour cycle.
(a) Aquifer is groundwater stored between layers of hard rock below the water table.
(b) The process of seepage of water in the ground is called infiltration.
(c) The evaporation of water from oceans and its arrival back into oceans is called the water cycle.
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- Which of the following statements are “true”?(a) Water vapour is present in air only during the monsoon.(b) Water evaporates into air from oceans, rivers and lakes but not from the soil.(c) The process of water changing into its vapour is called evaporation.(d) The evaporation of water takes place only in sunlight.(e) Water vapour condenses to form tiny droplets of water in the upper layers of air where it is cooler.
- Fill in the blanks with the appropriate answers:(a) People obtain groundwater through _______ and ________.(b) Three forms of water are solid, _______ and __________.(c) The water bearing layer of the earth is __________.(d) The process of water seepage into the ground is called _________.
- Paheli asked for a glass of water from Boojho. He gave her a glass of ice cold water. Paheli observed some water droplets on the outer surface of the glass and asked Boojho how these droplets of water were formed. Which of the following should be Boojho’s answer?(a) Evaporation of water from the glass.(b) Water that seeped out from the glass.(c) Evaporation of atmospheric water vapour.(d) Condensation of atmospheric water vapour.
- Fill up the blanks in the following:(a) The process of changing water into its vapour is called_______________ .(b) The process of changing water vapour into water is called_____________ .(c) No rainfall for a year or more may lead to _____________ in that region.(d) Excessive rain may cause__________ .
- What is groundwater? What are the sources of water which are fed by groundwater?
- Can we reverse the following changes? If yes, suggest the name of the method.(a) Water into water vapour(b) Water vapour into water(c) Ice into water(d) Curd into milk
- What is evaporation? State one large scale use of the process of evaporation.
- DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 3 The evaporation of water from leaves generates a suction pull which can pull water to great heights in tall trees. What is the name of the process described in the passage?(a) Evaporation(b) Suction(c) Transpiration(d) Transportation
- Transpiration is a process in which plants(a) receive water from soil(b) absorb water vapour from air(c) prepare food from water(d) release water vapour.
- State whether the following statements are true or false :(a) Alcohol can be separated from a mixture of alcohol and water by a separating funnel.(b) Salt and water can be recovered from an aqueous salt solution by the process of evaporation.
- Salt can be separated from its solution (salt dissolved in water), because(a) mixing of salt in water is a change that can be reversed by heating and melting of salt(b) mixing of salt in water is a change that cannot be reversed(c) mixing of salt in water is a permanent ‘ change(d) mixing of salt in water is a change that can be reversed by evaporation.
- State whether the following statements are true or False. If false, give the correct statement.(a) The process of seeping of water into ground is called filtration.(b) 51% of the earth’s surface is covered with water.(c) Year 2003 was observed as the International Year of Freshwater.(d) Snow and ice both are solid forms of water.
- Fill in the blanks in the given passage.The rainwater and _____ from other sources such as rivers and ponds seeps through the _____ and fills the empty spaces and cracks deep below the ground. The process of seeping of water into the ground is called _____.
- What is the correct order of the methods you would apply to separate the components of a mixture of ammonium chloride, common salt and sand ?(1) dissolving in water, filtration, evaporation and sublimation(2) dissolving in water, evaporation and sublimation(3) sublimation, dissolving in water, filtration and evaporation(4) moving a magnet, dissolving in water and sublimation
- State whether the following statements are True or False. If false, write the correct statement.(a) Water vapour is the gaseous form of water.(b) Ice is solid whereas snow is the semi-solid form of water.(c) Ocean water cannot be used for domestic purposes.(d) Rapid growth of industries is one of the causes for water shortage.
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