Small buttercup rice

One day, Xiaomao took a bag of rice across the river and he thought the rice was too heavy. At this time, he thought of the last time he was licking salt. That time he accidentally dropped the salt into the river, and the salt bag slowly became light. So he deliberately wet the rice bag. However, the rice is not light, but it is heavy.

So he went to ask his father: "Why does the salt become lighter in the water, but the rice will become heavier?"

Dad said: "Because the salt will be dissolved in the water, and the rice will absorb the water."

This time Xiaomao understood.