8. Question 2:
What does balance mean in scientific terms
when we are referring to forces?
Answers:
The forces are the same.
The forces are cancelling each other.
One force counteracts the other.
9. Question 3:
How could you illustrate or represent balanced
forces? Answers:
Some possible representations are:
seesaw , a balance beam , or a weighing scale
11. Lesson Purpose and Intention
Help students use symbols in
communicating information in
Science
Differentiate balanced and
unbalanced forces
How forces can affect the way an
object moves
17. Net Force
ois the sum of all forces acting on an object;
oWhen the forces acting on an object are balanced, there is
no net force and so the object will not move.
oWhen the forces acting on an object are unbalanced, there
is net force and so the object will move.
18. Question 1:
What does equal forces mean?
Answer:
The same sized forces – two or more
19. Question 2:
What are some ways that the motion of objects
might be changed?
Answer:
They could start moving from being still
They could speed up
They could change direction
They could stop moving
21. Question 3:
What needs to happen for a force to
change an object’s motion?
Answer:
If an object is still, you would need to apply a force to it to
make it move.
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.
22. Question 1:
In Lesson Activity 1, The stimulus shows four
ways to represent forces using symbols.
Which situations are representing balanced
forces?
Answer:
Situation 1 and 4
23. Question 2:
In Lesson Activity 1, Assuming the square objects are
the same size and mass, what do you predict would
be the movement of the objects in each situation
when the forces represented were applied to the
objects?
Answers:
The object in situation 1 will not move.
The object in situation 2 will move to the right.
The object in situation 3 will move to the left.
The object in situation 4 will not move.
24. Question 3:
Write a general statement that describes the
relationship between forces and the motion of an
object?
Answers:
If the forces acting on an object are balanced, the object will not
move.
If the forces acting on an object are unbalanced, the object will
move.
If there is no net force, the object will not move.
If there is a net force, the object will move.
AIM. Ask a question.
METHOD. What to do/procedure.
RESULTS. What you measured/data.
CONCLUSION. What you learned.s
AIM. Ask a question.
METHOD. What to do/procedure.
RESULTS. What you measured/data.
CONCLUSION. What you learned.s
AIM. Ask a question.
METHOD. What to do/procedure.
RESULTS. What you measured/data.
CONCLUSION. What you learned.s
AIM. Ask a question.
METHOD. What to do/procedure.
RESULTS. What you measured/data.
CONCLUSION. What you learned.s
We want to be sure we know and understand about fair testing.
Ask the students to complete the task below by watching the headings with their role/purpose. Explain that they are to use arrows to complete the matching/task. Ask students to provide answers and discuss where needed.
Refer students to the main lesson stimulus and read out the text.
Ask students to reads the text to themselves.
Ask the students if there are words that they are not familiar with and give descriptions of any words that may be problematic.
Ask the students if there are words that they are not familiar with and give descriptions of any words that may be problematic.
Answer: He should use a thermometer
Answer: He should use a thermometer
Answer: He should measure the size of the balloons by weighing them three times.
Answer: He should use a thermometer
Answer: All the balloons he is using must be the same type and the same size to begin with.
He must use the same scales to weight the balloons and the same thermometer to measure the temperature each time.
He must do the experiment all on the same day so that the weather conditions are the same for all the measurements.
Answer: All the balloons he is using must be the same type and the same size to begin with.
He must use the same scales to weight the balloons and the same thermometer to measure the temperature each time.
He must do the experiment all on the same day so that the weather conditions are the same for all the measurements.
Answer: All the balloons he is using must be the same type and the same size to begin with.
He must use the same scales to weight the balloons and the same thermometer to measure the temperature each time.
He must do the experiment all on the same day so that the weather conditions are the same for all the measurements.
Answer: All the balloons he is using must be the same type and the same size to begin with.
He must use the same scales to weight the balloons and the same thermometer to measure the temperature each time.
He must do the experiment all on the same day so that the weather conditions are the same for all the measurements.
Describe the components of a scientific investigation and we want to be sure we know and understand about fair testing.
