Children's Encyclopedia1976 |
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Pàgina 14
... Plants Coal is sometimes called a fossil fuel . This is because it was formed millions of years ago when the earth was covered with swamps . Huge fern - like plants grew then . When the plants died they fell into the swamps and decayed ...
... Plants Coal is sometimes called a fossil fuel . This is because it was formed millions of years ago when the earth was covered with swamps . Huge fern - like plants grew then . When the plants died they fell into the swamps and decayed ...
Pàgina 20
Plants make up a very large and important part of nature . There are more than 360,000 kinds of plants . Some plants are so small that they can only be seen through a microscope . Others are over 300 feet tall and may live for thousands ...
Plants make up a very large and important part of nature . There are more than 360,000 kinds of plants . Some plants are so small that they can only be seen through a microscope . Others are over 300 feet tall and may live for thousands ...
Pàgina 21
... plant . Many plants have extremely clever ways of making sure that their seeds travel as far as possible . Poppy seeds are shaken , a few at a time , from a capsule that is rather like a pepper pot . The seeds are small and light and ...
... plant . Many plants have extremely clever ways of making sure that their seeds travel as far as possible . Poppy seeds are shaken , a few at a time , from a capsule that is rather like a pepper pot . The seeds are small and light and ...
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