6. 小宇邀请你讲述自己的发现。请参考发言提纲，完成自己的科学分享吧。

参考示例：
My science story
Hello, my name is Lily.
I find that pulling a light thing uses smaller force.
I did a small experiment at home last weekend. I pulled my light toy car easily, but I had to use much more strength to pull my heavy suitcase.
It is interesting to find different rules of force in daily life.
Thank you.

本题是贴合本单元“力让物体运动”主题的开放性情景写作题，结合生活中推拉不同重量物体的受力常识，用已学的基础英语词汇补全分享内容，表意通顺、符合逻辑、语法正确即可。

Step 1 Read, circle and write
探索营的科普画报设置了趣味挑战板块。请你读一读画报内容，圈出或写出最佳答案，完成挑战。

Smart force tips
▲ Push heavy things from the bottom, not the top.
▲ Pick the right tool: wheels (轮子) make movement easier.
▲ Ask friends for help: two heads are better than one!
1. Which one is the easiest way to move the box?
A. B. C.
2. When we move a heavy bookshelf, we should push it from the .
A. top B. middle C. bottom
3. Lily wants to move a heavy box. How can she use a smaller force?
A. Put the box in a cart and pull it by herself.
B. Put the box in a cart and pull it with her friend.
C. Pull the box on the floor.
4. You want to move a heavy big box. Put the ways in order: from the smallest force to the biggest force.
① Put the box in a cart and push it by yourself.
② Put the box in a cart and push it with friends.
③ Pull it on the floor.
Answer: → →
5. When you want to move a heavy thing, what can you do?

1.C 2.C 3.B 4.②→①→③ 5.略