CONSOLSCI8_Lesson1. presentation for NLC

Lesson 2 science 7 Learning Camp

1. BALANCED AND UNBALANCED FORCES

2. Read out the text in the comic strip:

3. 1a. What does the word balance mean in everyday terms? 1b. What does the word force mean in everyday terms? 2. What does balance mean in scientific terms when we are referring to forces? 3. How could you illustrate or represent balanced forces?

4. Short Review

5. Question 1a.: What does the word balance mean in everyday terms? When something is stable, equal or not falling over.

6. Question 2: What does balance mean in scientific terms when we are referring to forces? Balance in scientific terms mean forces are the same.

7. Question 1b.: What does the word force mean in everyday terms? To break something open, like to force a door to open; Push and pull of an object.

8. Question 3: How could you illustrate or represent balanced forces?

9. Lesson Purpose and Intention

10. Lesson Purpose and Intention The lesson is about balanced and unbalanced forces and how forces can affect the way an object moves. The lesson may also help student to be better at using symbols to communicate information in science.

11. Lesson Language Practice

12. Force Same direction Opposite direction Cancel Representations Situations

13. Lesson Activity

14. Balance and Forces 1.Equal forces acting in opposite directions in the same line cancel each other and are described as being ‘in balance’. 2.The movement of objects is changed if the forces acting on them are not ‘in balance’.

15. Four ways to represent forces using symbols

16. Question 1. What does Equal forces mean? Question 2. What are some ways that the motion of objects might be changed? Question 3. What needs to happen for a force to change an object’s motion?

17. Question 1. What does Equal forces mean? The same sized forces – two or more

18. Question 2. What are some ways that the motion of objects might be changed? They could start moving from being still They could stop moving . .

19. Question 3. What needs to happen for a force to change an object’s motion? If an object is still, you would need to apply a force to it to make it move (like push it or pull it). If an object is moving, you could apply a force to it to make it slow down, to make it change direction, or to make it go faster.

20. Read out and answer the following questions based on the diagram shown below: Question 1. The stimulus shows four ways to represent forces using symbols. Which situations are representing balanced forces?

21. Question 2. Assuming the square objects are the same size and mass (weight), what do you predict would be the movement of the objects in each situation when the forces represented were applied to the objects?

22. Question 3. Write a general statement that describes the relationship between forces and the motion of an object?

23. Lesson Conclusion