102 Let's Go to School!-Mid

Let's Go to School! FOCUS Question How can a person use a force to get to school?

让我们去上学吧!焦点问题一个人如何使用一种力去上学?

Time for School! It's time to go to school. How will you get there? There are many different ways to get to school. All the ways to get to school have something in common. They need a force. A force is a push or a pull on an object that comes from something else.

上学时间到了!该去上学了。 你怎么去那里?去学校有很多不同的方法。 所有去学校的方法都有共同点。 他们需要一种力量。力是对一个物体的推或拉，它来自于另一个物体。

Walking You can walk to school. You use your feet to push against the ground. Pushing against the ground is the force that makes you move. If you push harder. you walk faster. If you are late for school. push even harder and run.

你可以步行去学校。 你用脚蹬地。 推动地面的力量使你移动。 如果你再努力一点。你走得更快了。 如果你上学迟到了。 再用力一点，然后跑。

Wheel Power You can ride a scooter to school. You use your foot to push against the ground. The push makes the scooter move on its wheels. Push harder! The scooter moves faster. You move faster too!

你可以骑摩托车去学校。 你用脚蹬地。 推力使滑板车在轮子上移动。 更加努力!滑板车跑得更快。 你也会走得更快!

You can ride a bicycle to school. Push on the pedals with your feet to make the wheels turn. The wheels push against the ground. Push harder! The bicycle moves faster. You move faster too! Science in Your World Walking or riding a bike is a healthy way to get to school. It also keeps the air clean!

你可以骑自行车去学校。 用脚踩踏板使轮子转动。 轮子推着地面。 更加努力!自行车跑得更快。 你也会走得更快!步行或骑自行车是一种健康的上学方式。 它还能保持空气清洁!

Catch a Ride You can ride in a car or bus to get to school. The engine makes the wheels push against the ground. When the wheels move, you move inside the car or bus. When the car or bus goes faster you go faster, too!

你可以乘汽车或公共汽车去学校。 发动机使轮子推着地面。 当轮子转动时，你在汽车或公共汽车内部移动。 当汽车或公共汽车开得快时，你也会走得快!