Fill in the blanks :
(1) The state of a substance changes if it is …………… or …………… .
(2) Every substance in our surroundings is found in either the ……………, …………… or gaseous state.
(3) On …………… heat, the substance changes from solid to liquid and liquid to gas.
(4) When the substance cools, or …………… heat, it changes from gaseous to liquid and liquid to solid state.
(5) A …………… amount of heat must be gained or lost before the state of a substance can change.
(6) When a substance gets heat, it becomes …………… and then …………… .
(7) If the substance is very hot, we could get …………… .
(8) A thermometer is used to measure …………… .
(9) …………… is the unit of measuring temperature.
(10) Nowadays, …………… thermometers are frequently used.
(11) Solids have a shape of its …………… .
(12) Solids have a …………… volume.
(13) Liquids take the shape of the …………… .
(14) Liquids have a …………… volume.
(15) Air occupies all the available …………… .
(16) Evaporation occurs from the …………… of the water.
(17) At sea-level, pure water boils at …………… .
(18) Condensation of steam takes place at …………… .
(19) The temperature of a substance can fall below …………… .
(20) Ice melts at …………… .
(21) Each substance has a specific boiling point which is also its …………… point.
(22) Each substance has a specific melting point which is the same as its …………… point.
(23) Candles are made by melting …………… wax.
(24) Solid carbon-dioxide is …………… .
(25) Liquid …………… is used in animal husbandry.
(26) Sand is melted to make …………… .
(27) Iron is melted to make …………… .
(28) Substances can be identified by studying their …………… .
(29) Substances that break into small particles are said to be …………… .
(30) The …………… of any liquid is determined by how easily it flows.
(31) Between substances of the same volume, the ones with greater density are …………… than those of lesser density.
(32) The property of a substance of getting …………… is called its solubility.
(33) Minerals from the earth’s crust are …………… to obtain metals.
(34) Metals can be converted into …………… by hammering
(35) Metals can be stretched and drawn into …………… .
(36) All metals are …………… of electricity to a greater or lesser extent.
(37) Every metal has a …………… colour by which it can be identified.
(38) Metals produce …………… sound.
(39) Metals form a …………… group of substances.
(40) Heat is the cause of the change of the state of …………… .
