Teaching design of how to make the ball move in primary school science

Teaching design of how to make the ball move

Teaching objectives

Scientific inquiry goal:

1, imagine all kinds of schemes to make objects move and methods to change the direction of objects.

2. Be able to test your ideas with experiments.

3, can correctly describe the phenomenon in the experiment, through analysis, draw a conclusion.

Emotional attitude and value goal;

1, willing to think of various ways to make objects move.

2. Be able to communicate assumptions and experimental methods with other groups and find out the best method.

Scientific knowledge objectives:

1, it can be said that an object can change from static to moving under the action of force.

2, can distinguish the movement of the object is mainly the result of what kind of force (such as wind, water, gravity, elasticity, etc.). ).

capability goal

1, an example that can be combined with real life and use more force to change the motion of objects.

Class schedule: one class.

Teaching preparation: all kinds of balls, air pumps, fans, thin wires, baffles, magnets, pins, etc.

Key point: guide students to design more schemes to make the ball move.

Difficulty: Find out what kind of force acts on the motion of an object.

Teaching process:

First, introduce a conversation

Because students like playing table tennis and basketball, this paper introduces the methods of playing in the new lesson: think of various ways to make the ball move from rest and what makes it move.

Second, activity: let the ball move.

Activity 1 Let the ball move.

1, group wisdom, there are many and unique ways to make the ball move.

2. Put forward observation requirements, and the team will try it according to the design scheme.

3. Group activities, reports and exchanges.

Thinking:

1. How do we make the ball move and observe how the ball moves?

Tip: Observe how to make the ball move, and pay attention to how the ball moves.

Abstract: In order to change an object from static to moving or change its moving direction, an external force must be applied to the object.

Try again, how to change the direction of the ball?

Tip: Pay attention to the movement direction before and after the change.

Summary: it is necessary to push or pull the ball from rest to movement; To make the moving ball turn left, a left force must be applied to it, and to make it turn right, a right force must be applied to it.

3. In our method, what force makes the ball change from static to moving?

My conclusion is: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.

Activity 2 What force makes an object start to move?

1, combined with pictures, observe and think: what is it? Under what power did they start to move?

Tip: What is the force required for an object to move?

2. Communicate and know that sailing ships move under the action of wind; The arrow moves under the action of elasticity, so does the slingshot, which ejects the bullet by elasticity; The mill rotates under the power of livestock; The waterwheel rotates under the impact of water; ......

3. What other examples can you cite in your life to change the motion of an object by force?

Third, online reading science.

External forces can make objects move. What does it look like to move? Demonstration: Push the book out horizontally, turn the waterwheel and play the erhu. )

Teachers ask questions and students read science online;

Read "The Motion of Objects"

1. Do objects move in the same way?

2. According to P39 pictures, please tell the students what kind of movements they belong to: translation, rotation and vibration, and distinguish the characteristics of each form.

3. Students talk about the way objects move with examples.

think

1. There are three basic ways to exercise, namely (), () and ().

2. Classification problem

The movement of swivel chair, sliding slideway, drawer, fluctuation of wheel movement, rubber band pendulum.

The movement of the door, the movement of the string window, the tuning fork and the wooden box were flattened.

Translation: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Rotation system: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Vibration: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Blackboard writing:

1 1 How to make the ball move?

Let the ball move.