If you heat water to 100°C,, it boils., If you mix red and blue,, you get purple., If it rains,, the ground gets wet., If you don't water plants,, they don't grow., If people don't eat,, they don't have energy., If you don't press the button,, the machine doesn't start., If you leave ice in the sun,, does it melt?, If you exercise every day,, do you feel better?, If you touch fire,, does it burn?.

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