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 _________.
Fill in the blanks with the appropriate answers:
(a) People obtain groundwater through wells and handpumps.
(b) Three forms of water are solid, liquid and gas.
(c) The water-bearing layer of the earth is aquifer.
(d) The process of water seepage into the ground is called infiltration.
[Extra information: Water is a colourless, odourless, tasteless liquid. It comprises 70% of the earth's surface. Hydrosphere is the total amount of water present on a planet. Water resources are natural resources of water that are potentially useful. It is important because it is needed for life to exist. It makes up about 70 percent of our body content. Uses of water include agricultural, industrial, household, recreational and environmental activities. All living things require water to grow. Water is important for all living beings. Water can dissolve a large number of substances, so it is needed by the body. It is also a major part of our body cells. The freshwater stored in the ground is much more than that present in the rivers and lakes of the world.]
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- 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 _____.
- 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.
- 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__________ .
- Fill in the blanks:(a) Cleaning of water is process of removing __________(b) Wastewater released by houses is called __________.(c) Dried __________ is used as manure.(d) Drains get blocked by __________ and __________.
- What is groundwater? What are the sources of water which are fed by groundwater?
- Infiltration isA) Filtration of water thought filter paperB) Filtration of water thought funnelC) Seepage of water into the groundD) Decantation of water
- 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.
- What are the forms of water?
- 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
- When the solid A is added to water, it dissolves with the evolution of a lot of heat and making little explosions to form two products B and C. The properties of products B and C are entirely different from those of solid A as well as water. Moreover, products B and B cannot be reconverted into solid A and water. When another solid D is added to water, it dissolves with the absorption of a little heat to form a product E which cools down. The product E shows the properties of both, solid D as well as water. Moreover, product E can be converted into solid D and water.(a) What type of change occurs when solid A is dissolved in water? Why?(b) What type of change occurs when solid D is dissolved in water? Why?(c) Name a metal which you think could behave like solid A. Also, name the products B and C.(d) Name the solid D if it is the one which is used in making ordinary dry cells.(e) Name the process by which D can be recovered from E.
- 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.
- Choose the correct statement of the following(a) Conversion of solid into vapours without passing through the liquid state is called sublimation.(b) Conversion of vapours into solid without passing through the liquid state is called vaporisation.(c) Conversion of vapours into solid without passing through the liquid state is called freezing.(d) Conversion of solid into liquid is called sublimation.
- The phloem tissue in plants is responsible for the transport of:(a) water (b) water and minerals (c) sugar (d) all of the above
- Fill in the following blanks with suitable words:(a) In water, the proportion of oxygen and hydrogen is _____ by mass.(b) In a chemical reaction, the sum of the masses of the reactants and the products remains unchanged. This is called _____.
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