Lesson Plan

## Pushing and Pulling

### Objectives

In this lesson, students identify motion as a push or a pull. Students will:

• describe motion as a push or a pull.

• identify the motion of an object as a push or a pull.

• the motion of an object can be traced and measured.

### Vocabulary

• Force:A push or pull which can cause an object to speed up, slow down, or change direction.

• Gravity: The force by which all objects in the universe are attracted to each other.

• Motion: A change in position of an object.

### Duration

30–45 minutes/2 class periods

### Prerequisite Skills

Prerequisite Skills haven't been entered into the lesson plan.

### Related Materials & Resources

The possible inclusion of commercial websites below is not an implied endorsement of their products, which are not free, and are not required for this lesson plan.

### Formative Assessment

• View
You will assess students’ understanding of force and motion:
• Assess students’ ability to identify the direction of force through a review of the Force worksheet.

• Students collect, measure, and record data, demonstrating their understanding of the experimental procedure.

• Observe students as they respond to questions about forces.

• Monitor students’ responses in group discussions to ensure that students understand the difference between a push and a pull.

• Collect students’ worksheets for individual assessment.

• Observe whether students practice safety procedures during an investigation as they move about and use equipment.

### Suggested Instructional Supports

• View
Scaffolding, Active Engagement, Modeling, Explicit Instruction W: Students identify force as a push and pull and observe how a push or a pull can affect an object. H: Students engage in an activity to demonstrate pushing and pulling force. They push and pull with a partner to experience how force acts upon an object. E: Students set up an investigation to measure the amount of change to an object when a force such as a push or a pull is applied. R: Students collect data by measuring the distance an object travels when a force is applied. Students determine if the mass or size of the object affects the distance it travels. E: Assessment for this lesson is formative and based on student worksheets, teacher observation, and responses to discussion questions. T: This lesson allows for students to work in groups during classroom investigations. It revisits the concept of force through multiple opportunities for students. O: This lesson is organized and sequenced to provide students a concrete understanding of force; it engages students in hands-on investigations and participation in activities.

### Instructional Procedures

• View
Activity 1, Day 1

Write the word force on the board or chart. Ask students if they can define this word. Allow students to develop a working definition of force as a push or a pull. Add to this definition: “which can cause an object to speed up, slow down, or change direction.”

Ask students if there was a force used when they placed their hands on their partners. (Yes, we pushed and pulled.) Tell students they were applying or using force. Draw two arrows on a chart or board. Ask students: “If I wanted to show a force such as a push or a pull, how could I use the arrows to do that?” Students should conclude that the arrows could be used to show the direction of the force that is being applied.

Distribute copies of the Hunting for a Force worksheet (S-K2-15-1_Hunting for a Force.doc). Tell students they will be taking a field investigation around the school and outside to locate examples of a push or pull force. They are to identify the example and circle the arrow that indicated the direction of the force being applied. Note: Preview the area you will be taking students so that examples can be found easily for them. Areas may be marked if students need practice identifying objects.

Give students copies of The Force worksheet (S-K2-15-1_The Force.doc) and have them complete it.

Activity 2, Day 2

Review with students the term force and how we identify a force that is applied to an object.

Tell students they will investigate the change that occurs when a force, such as a push or a pull, is applied to an object. Give a few examples such as pushing someone on a swing or pushing a shopping cart. Be sure to go over safety procedures with students and remind students that goggles should be worn at all times during this investigation.

Hand out copies of the Cotton Ball Launcher worksheet (S-K2-15-1_Cotton Ball Launcher.doc). Divide students into groups of four. Give each group two large paper clips and two small paper clips. Note: You may prepare the paper clips if you feel students will not be able to do this independently. Prepare each clip to become a launcher by pulling the inside of the clip out to form a “V” shape. Place the large part of one clip down and tape it to the table so that the small loop is up.

Take the other large clip and tape the small loop to the table or floor so that the large loop is up.

Tell students they are to determine who will launch the larger clips and the smaller clips. Students who are not launching will measure and record the data on the investigation sheet. Tell students to place the cotton ball on the “launcher” part of each large paper clip. Pull or push the launcher clip down and release. Launch the cotton ball, measure, and record the distance. Repeat the launch three times and record measurements. Note: Model how the cotton ball should be launched and measured for students.

Note: Two paper clips will be taped to the table. One will be taped by the larger section and the other by the smaller section.

Repeat this investigation with the two smaller clips.

Collect the data from other group members and make two charts displaying the data. Discuss results with students. Have students draw conclusions about their results.

Extension:

For students who may be going beyond the standards:

• Have students design their own launchers. Then they launch cotton balls, or other material record measurements, and compare data with other students.

• Create a bar graph to display the results.

For students who might need opportunities for additional learning:
• At home students compile a list of examples of push and pull force being applied on objects. Students also indicate with arrows the direction of force.

### Related Instructional Videos

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Instructional videos haven't been assigned to the lesson plan.
DRAFT 11/10/2010