Question

【题目】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 (指南针)？

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】

本文是一篇说明文。科学是孩子们最感兴趣和最有趣的学科之一。文章介绍了一个有关磁铁的实验。提供了一种方法来激发孩子们对科学的热情。

【1】细节理解题。根据Step 2中的Test the now magnetised needle with the spare needle to see if it can pick it up.可知，用备用针头测试磁化的针头，看看它能不能把它捡起来。因此可知，备用针头是用来检查另一根针是否被磁化。故选D。

【2】推理判断题。根据Step3中的Then, at the bottom end of the hanging string, tie the magnetised needle.( 然后，在挂线的底端，绑上磁化针。)和Step 5Watch as the needle moves on its own to point north.( 当针自行移动指向北方时，请注意)可知，针有磁性，如果磁化针可以指向北方，是因为它具有磁铁的特性。故选B。

【3】推理判断题。根据最后一段的Once your kids have got a taste for magnets, you might want to move on to more advanced experiments.(一旦你的孩子对磁铁有了兴趣，你可能会想继续做更高级的实验) 可推断，文章讲述这个磁铁试验的目的是为了提供一种方法来激发孩子们对科学的热情。故选D。

细节理解题是阅读理解中常见的题型。考生在做这类题时一定要仔细审题，弄懂题干，题干当中往往有重要信息，然后回文定位，找到依据。比如此题第1题，根据题干定位在Step2, 根据Step 2中的Test the now magnetised needle with the spare needle to see if it can pick it up.可知，用备用针头测试磁化的针头，看看它能不能把它捡起来。因此可知，备用针头是用来检查另一根针是否被磁化。故选D。