Water is chosen because...
Living things need water to survive. Hence, when the substances are put in the water and there is a decrease in the amount of water, it can be concluded that the substance is a living thing. However, if there is no change in the water volume, we can deduce that the substance is a non-living thing.
Glucose is chosen because...
Glucose is food. Living things need food to survive. Hence, if there is a decrease in the amount of glucose in the test tube after the substance is put in, we can conclude that the substance has taken in the glucose for survival, resulting in a conclusion that the substance is a living thing.
Salt water is chosen because...
Salt is generally needed for most living things to digest food and produce energy. Therefore, if there is a decrease in the salt amount in the water after the substance is put in, we can deduce that the substance is a living thing.
Living things need water to survive. Hence, when the substances are put in the water and there is a decrease in the amount of water, it can be concluded that the substance is a living thing. However, if there is no change in the water volume, we can deduce that the substance is a non-living thing.
Glucose is chosen because...
Glucose is food. Living things need food to survive. Hence, if there is a decrease in the amount of glucose in the test tube after the substance is put in, we can conclude that the substance has taken in the glucose for survival, resulting in a conclusion that the substance is a living thing.
Salt water is chosen because...
Salt is generally needed for most living things to digest food and produce energy. Therefore, if there is a decrease in the salt amount in the water after the substance is put in, we can deduce that the substance is a living thing.
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