Question

【題目】Fun School Projects with Magnets and Metal

Science is one of the most interesting and fun subjects for kids.

There are endless opportunities for practical experiments that are sure to surprise and excite children's imaginations. A great way to get into experimenting with science is with the use of magnets. The properties of magnets allow for an “ invisible force ” to move objects seemingly on their own!

If your kids are looking for something a little trickier, why not let them try using magnets to make their own compass (指南針)？

For this experiment, you will need 2 needles, a strong magnet, a pencil, a cup and some string.

Step 1: Rub the pointed end of the needle along one side of the magnet ；this can be either the north or south end. Make sure you are rubbing the needle in one direction, not back and forth. You might need to do this about 30 times to magnetise the needle.

Step 2: Test the now magnetised needle with the spare needle to see if it can pick it up. If it can, the needle is ready to use for the experiment. If it doesn't pick it up, you will need to rub the needle a few more times on the same end of the magnet you were using before.

Step 3 : With a piece of string that is a couple of inches long, get your child to tie this to the middle of the pencil. Then, at the bottom end of the hanging string, tie the magnetised needle.

Step 4: Place the pencil, with the needle hanging down, over the top of a cup so that the needle is hanging inside the cup.

Step 5 : Watch as the needle moves on its own to point north.

Once your kids have got a taste for magnets, you might want to move on to more advanced experiments. Places like RS Components sell high-tech magnetic equipment that will be sure to carry on fuelling your children's passion for science!

【1】According to the passage, the spare needle is used to _______.

A.pick the other needle upB.magnetise the other needle

C.rub the magnet on the other sideD.check if the other needle is magnetised

【2】The magnetised needle can point north because _______.

A.it is tied to a hanging stringB.it has the properties of a magnet

C.it is connected with a magnetD.it is hanging down inside the cup

【3】What is the main purpose of this passage?

A.To promote high-tech magnetic equipment.

B.To entertain kids with magnet experiments.

C.To stress the importance of advanced experiments.

D.To provide a way to fuel kids' passion for science.

Answer 1

【答案】

【1】D

【2】B

【3】D

【解析】

本文是一篇說明文。科學(xué)是孩子們最感興趣和最有趣的學(xué)科之一。文章介紹了一個(gè)有關(guān)磁鐵的實(shí)驗(yàn)。提供了一種方法來激發(fā)孩子們對科學(xué)的熱情。

【1】細(xì)節(jié)理解題。根據(jù)Step 2中的Test the now magnetised needle with the spare needle to see if it can pick it up.可知，用備用針頭測試磁化的針頭，看看它能不能把它撿起來。因此可知，備用針頭是用來檢查另一根針是否被磁化。故選D。

【2】推理判斷題。根據(jù)Step3中的Then, at the bottom end of the hanging string, tie the magnetised needle.( 然后，在掛線的底端，綁上磁化針。)和Step 5Watch as the needle moves on its own to point north.( 當(dāng)針自行移動指向北方時(shí)，請注意)可知，針有磁性，如果磁化針可以指向北方，是因?yàn)樗�具有磁鐵的特性。故選B。

【3】推理判斷題。根據(jù)最后一段的Once your kids have got a taste for magnets, you might want to move on to more advanced experiments.(一旦你的孩子對磁鐵有了興趣，你可能會想繼續(xù)做更高級的實(shí)驗(yàn)) 可推斷，文章講述這個(gè)磁鐵試驗(yàn)的目的是為了提供一種方法來激發(fā)孩子們對科學(xué)的熱情。故選D。

細(xì)節(jié)理解題是閱讀理解中常見的題型。考生在做這類題時(shí)一定要仔細(xì)審題，弄懂題干，題干當(dāng)中往往有重要信息，然后回文定位，找到依據(jù)。比如此題第1題，根據(jù)題干定位在Step2, 根據(jù)Step 2中的Test the now magnetised needle with the spare needle to see if it can pick it up.可知，用備用針頭測試磁化的針頭，看看它能不能把它撿起來。因此可知，備用針頭是用來檢查另一根針是否被磁化。故選D。