plastic & magnet

Name: _________________

一、Fill in the blank.

1.______________are made from chemicals that come from oil.

2.Five common kinds of plastic?

__________________ _________________ _________________

__________________ ___________________________________ 3.Properties of plastic : ________________ _________________

_________________________ _________________________

___________________________

4.All magnets have 2 poles: _______________ and______________.

5.The north pole of a magnet __________ the north pole of another magnet.

6.The south pole of a magnet _________ the north pole of another magnet.

7.Things are attracted to magnets : ______________ ____________ ___________ ____________.

8.Unlike poles of magnets ______________or ____________________.

9.Like poles of magnets _______________or _____________________.

10.Materials which are not attracted to magnets are said to be

________________.

11.Materials which are attracted to magnets are said to be

________________.

12.When magnets are close, they create _________ or __________

forces on one another.

13.The pull of a magnet is strongest at its ________ or __________.

二、 Choose.

1.

2.

并读试卷两遍（复习） 家长签名:__________