Light energy from the sun was working on the beach too. It supplied the daylight.
It lit the earth and made the sand bright and the water sparkling.
The sun also supplied the energy that grew the food you ate.
Plants use light energy from the sun to make food for themselves. The food is a kind of sugar. It is also a kind of energy called chemical energy. Green plants change light energy from the sun into chemical energy.
Plants use some of that energy for everyday living and growing. They store the rest in their leaves and seeds, in fruit, roots, stems, and berries.
The salad and the corn, the rolls, fruit, and coffee all came from plants. You and all animals depend on plants for food.
The charcoal you used for cooking began as a plant too. Once, that charcoal was a living tree that used sunlight to make food and then stored part of the food it made. The energy in this stored food remained, even after the tree died. You used that energy when you burned the charcoal.
The gasoline you used for driving to the beach began with energy from the sun, too. It was made from oil.
Oil was formed from the remains of plants and animals that lived on earth millions of years ago. The remains of ancient living things are called fossils. This is why oil is called a fossil fuel. Coal and natural gas are fossil fuels, too.
【1大学英语四六级考试阅读提高练习题及答案(33)】相关文章:
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