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the heat energy of the liquid will decrease & freezing means a substance changes from a liquid into a solid by decreasing heat energy -> the liquid may freeze if the heat energy of the <mask> is decreasing
liquid
the heat energy of the liquid will decrease & freezing means a substance changes from a liquid into a solid by decreasing heat energy -> the liquid may freeze if the heat energy of the liquid is <mask>
decreasing
the temperature of the liquid will decrease & the liquid may freeze if the heat energy of the liquid is decreasing -> if <mask> of a liquid is transferred to the environment, then the temperature of the liquid will decrease and the liquid may freeze
heat
the temperature of the liquid will decrease & the liquid may freeze if the heat energy of the liquid is decreasing -> if heat of a <mask> is transferred to the environment, then the temperature of the liquid will decrease and the liquid may freeze
liquid
the temperature of the liquid will decrease & the liquid may freeze if the heat energy of the liquid is decreasing -> if heat of a liquid is <mask> to the environment, then the temperature of the liquid will decrease and the liquid may freeze
transferred
the temperature of the liquid will decrease & the liquid may freeze if the heat energy of the liquid is decreasing -> if heat of a liquid is transferred to the environment, then the <mask> of the liquid will decrease and the liquid may freeze
temperature
the temperature of the liquid will decrease & the liquid may freeze if the heat energy of the liquid is decreasing -> if heat of a liquid is transferred to the environment, then the temperature of the <mask> will decrease and the liquid may freeze
liquid
the temperature of the liquid will decrease & the liquid may freeze if the heat energy of the liquid is decreasing -> if heat of a liquid is transferred to the environment, then the temperature of the liquid will <mask> and the liquid may freeze
decrease
the temperature of the liquid will decrease & the liquid may freeze if the heat energy of the liquid is decreasing -> if heat of a liquid is transferred to the environment, then the temperature of the liquid will decrease and the <mask> may freeze
liquid
the temperature of the liquid will decrease & the liquid may freeze if the heat energy of the liquid is decreasing -> if heat of a liquid is transferred to the environment, then the temperature of the liquid will decrease and the liquid <mask> freeze
may
the temperature of the liquid will decrease & the liquid may freeze if the heat energy of the liquid is decreasing -> if heat of a liquid is transferred to the environment, then the temperature of the liquid will decrease and the liquid may <mask>
freeze
scientists go to a lake once a month to take samples of water & taking samples of water is used for studying the quality of water -> <mask> are studying the quality of the water in the lake
scientists
scientists go to a lake once a month to take samples of water & taking samples of water is used for studying the quality of water -> scientists are <mask> the quality of the water in the lake
studying
scientists go to a lake once a month to take samples of water & taking samples of water is used for studying the quality of water -> scientists are studying the <mask> of the water in the lake
quality
scientists go to a lake once a month to take samples of water & taking samples of water is used for studying the quality of water -> scientists are studying the quality of the <mask> in the lake
water
scientists go to a lake once a month to take samples of water & taking samples of water is used for studying the quality of water -> scientists are studying the quality of the water in the <mask>
lake