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Albert G. Ingalls's Amateur Telescope Making Vol 3 PDF

By Albert G. Ingalls

Fresh e-book. quantity three HARDCOVER. send swifter FROM TX.

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Example text

In your group, discuss what is happening and why it is dangerous. Then draw a diagram to explain how a volcano erupts. F Many of the earth’s rocks have been formed by the action of intense heat deep underground. The granite in this picture is one of these rocks. Take some soil and bake or heat it. Find the best way of recording the difference in the soil before and after you heat it.

B Plants grow in soil. But there are many different kinds of soil, and some are better than others at helping plants to grow. Find a place where there is some soil with plants growing in it. Look at it, touch it and smell it. Then fill in this table by putting ticks in the boxes. My soil is: Wet Hard Tiny particles Strong smell Has plant remains Dry Soft Large particles No smell No plant remains Which kind of soil do you think would be best for planting seeds in, and why? C 58 Mud and clay have always been used for making pots, bricks, and houses.

It means that you are studying the information with a question in your mind. Try Yourself D Douglas tried to make an anemometer for measuring the speed of the wind. He used the following things: plastic washing-up liquid bottle a cork 3 thin knitting needles 2 table tennis balls cut in half The diagram shows what it looked like when it was complete. How is it supposed to work? E Douglas took it outside on a windy day and stood it on a wall. It didn’t work. Can you think of 3 reasons why it would not work?

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Amateur Telescope Making Vol 3 by Albert G. Ingalls


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