Forces and Motion: Accelerate your Mass of Students
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1 FORCES AND MOTION 60 Minute Physical Science Lesson Science-to-Go! Program Grades: 1-5 TEACHER GUIDE Forces and Motion: Accelerate your Mass of Students Description Make sure you have plenty of room for this program as our Science Instructors convert your classroom into a high-action lab ruled by the Laws of Motion! Forces and motion are sometimes difficult concepts to describe, but easily observed and understood in reallife situations. As you and your students work through hands-on experiments and observations, we will explore gravity, Newton s Three Laws of Motion, friction, acceleration, velocity and how studying science can be physically fun! Objectives Compare how gravity affects objects of various masses Observe inertia in action Explore the concept of action-reaction through observation and analysis Conduct experiments to test the theory of acceleration Collect and record data in tabular form Ohio s Learning Standards Grade 1: Physical Science Motion and Materials Objects can be moved in a variety of ways, such as straight, zigzag, circular and back and forth. Grade 2: Physical Science Changes in Motion Forces change the motion of an object. Grade 5: Physical Science Light, Sound and Motion The amount of change in movement of an object is based on the mass of the object and the amount of force exerted. Produced and published by the Education Division 1 Wade Oval Dr., University Circle, Cleveland, OH /24/17
2 How to Set Up Your Room Please have student desks clear before the program begins. Please provide an empty desk or small table for the museum educator to set up display items. If booking multiple programs, transitions will be easier if museum staff sets up in only one location. Additional set-up requirements: o Divide class into 6 groups o Each student should have a pencil and a copy of the Forces and Motion worksheet (attached.) Please Note: There are 2 versions of the worksheet. Please print the one that best corresponds with your classes grade level and/or ability. Introduce the vocabulary and additional resources provided below. Vocabulary accelerate - to change the speed of motion in a certain amount of time conservation the keeping or protecting of something from change, loss, or damage force a push or pull on an object; the capacity to do work or cause physical change friction - a force that works against the motion of objects that are in contact as they move past each other; a force of resistance gravity the force of attraction between the Earth or another celestial body on an object on or near its surface inertia a property of objects that states they will remain at rest, or continue moving in a straight line unless some force causes them to change what they are doing mass the amount of matter (stuff) in an object; a measure of an object s inertia momentum the product of the mass and velocity of an object motion - the action or process of moving or of changing place or position; movement resistance a force that tends to oppose or slow down motion (acceleration) speed a measurement of distance over time mass the amount of matter (stuff) in an object; a measure of an object s inertia weight the measurement of the vertical force of gravity on an object Produced and published by the Education Division 1 Wade Oval Dr., University Circle, Cleveland, OH /24/17
3 Extension Activities Acceleration Test Take your students outside on a pleasant day to observe the acceleration of a ball thrown into the air. Stand in the middle of a large, open area and throw a large rubber ball high into the air. Have the students observe its ascent and descent. Ask them to observe at what point(s) the ball was moving fastest, and at which point it was moving slowest, as the ball left your hand. Let groups of students try it for themselves and explain how Newton s Second Law of Motion (acceleration) applies to their experiment. Action/Reaction Materials Needed: styrofoam cup 2 flexible straws cut to about 4 2 strings, each cut 5 long Procedure: Give 3-4 students the above materials and have them pierce the side of the cup with a straw, insert the straw halfway into the cup, and bend the flexible neck at a 90-degree angle to the exterior of the cup. Direct students to do the same with the other straw at a point on the cup exactly opposite the place where they inserted the first straw. Again, bend the flexible neck at a 90-degree angle to the exterior of the cup, so that both straw ends are facing the same way, either clockwise or counter-clockwise. Attach one piece of string to the top of the cup like a bucket handle, and tie the other piece to the center of the string handle, so that when they lift the string, the cup rotates. Direct the students to hold their cup by the string over a bucket or large plastic container. Have students pour water in the cup from a pitcher and observe the movement of the cup as the water comes out of the straws. Turn the straws in the opposite direction, again fill the cup with water, and observe. The students will notice that the action of the water draining from the straws causes a reaction: the cup rotates in the opposite direction. Ask students to predict what will happen when the straws are turned so that they point in opposite directions. Test their hypotheses and analyze the results. Produced and published by the Education Division 1 Wade Oval Dr., University Circle, Cleveland, OH /24/17
4 Online Resources for Teachers and Students Click the link below to find additional online resources for teachers and students. These websites are recommended by our Museum Educators and provide additional content information and some fun, interactive activities to share with your class. CMNH Educators regularly review these links for quality. Web addresses often change so please notify us if any links have issues. Cleveland Museum of Natural History Educator Resource Center (ERC) The Educator Resource Center offers educator workshops, thematic teaching kits, animal dioramas, and more for loan to area teachers. Contact the ERC at for information on individual or school membership. Visit the Museum s ERC website for more information on workshops Hours o Tuesday through Friday, 2 to 5 PM o Wednesday, 2 to 6 PM o Saturday, 9 AM to 1 PM o Closed Sunday and Monday Materials for Loan If you re interested in additional resources be sure to check out the following ERC materials or browse ERC materials online at Related ERC kits for this topic include: Force and Motion: Explore physics with this Forces and Motion kit! The kit includes a wide variety of materials to teach difficult physics concepts while students complete hands-on activities. An Educator guide is included with this kit. Introduction to Inquiry for the Early Grades: Physical Science: Use inquiry to engage young scientists in 6 exciting, hands-on learning centers! Students will explore light, sound, and magnets. Books and extension activities also included. Produced and published by the Education Division 1 Wade Oval Dr., University Circle, Cleveland, OH /24/17
5 Grades 1 and 2 Newton s First Law of Motion Inertia Newton s Second Law of Motion Newton s Third Law of Motion Force = Mass x Acceleration (F =m x a) Actions and Reactions GRAVITY: The force of gravity pulls objects towards Earth's center. 1. Collect Data: Rank the objects from lightest (1) to heaviest (4). Golf Ball Wiffle Ball Baseball Tennis Ball 2. Hypothesis: Which ball will hit the ground first? 3. Results: Which ball(s) hit the ground first? Produced and published by the Education Division, The Cleveland Museum of Natural History, 1 Wade Oval Dr., University Circle, Cleveland, OH Last Updated 6/22/2016.
6 Newton s 1st Law of Motion Inertia Newton s 2nd Law of Motion Force = Mass x Acceleration Newton s 3rd Law of Motion Actions and Reactions Observe: Mr. Moose and his roller skate car. 4. Hypothesis: What will happen if you add mass to the cart, but keep your force the same? (Circle your answer below) Travel more distance Travel less distance Observe: Give a push and get pushed back. Watch the rocket balloon fly. Cart Mass Distance (cm) Empty 1 Weight 2 Weights 5. Did the cart go further with more mass or less mass? (Circle your answer below) More mass Less mass Produced and published by the Education Division, The Cleveland Museum of Natural History, 1 Wade Oval Dr., University Circle, Cleveland, OH Last Updated 6/22/2016.
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9 Grades 3-5 Gravity The force of gravity pulls objects towards Earth's center. Newton s First Law of Motion An object at rest tends to remain at rest, and an object in motion tends to stay in motion, unless they are acted upon by an outside force. (INERTIA) Observe: Mr. Moose and his roller skate. 1. Rank the objects from lightest (1) to heaviest (4). Golf Ball Wiffle Ball Baseball Tennis Ball Newton s Second Law of Motion Acceleration of an object is directly related to the force applied to an object and inversely related to the mass of the object. (F = m x a) 2. Question: What happens if you drop the balls at the same time? Hypothesis: Which ball(s) will hit the ground first? 5. Question: When the force is kept constant, does changing the mass affect the distance traveled? Hypothesis: What will happen if mass is added to the cart? (circle one) 3. Results: Which ball(s) hit the ground first? Travel more distance Travel less distance 4. What causes resistance as the balls fall? 1. Produced and published by the Education Division, The Cleveland Museum of Natural History, 1 Wade Oval Dr., University Circle, Cleveland, OH Last Updated 6/22/2016.
10 SAME FORCE, CHANGING MASS 6. Cart Mass Empty 1 Weight Trial #1 (cm) Trial #2 (cm) Newton s 3 rd Law of Motion For every action, there is an equal and opposite reaction. Observe: Give a push and get pushed back. Watch the rocket balloon fly. 2 Weights Momentum Question: How are two moving objects with different masses affected by resistance? 11. Would this experiment work in outer space? Yes No 7. Hypothesis: When rolled down the same slope, which ball will travel the farthest? (circle one) AFTER YOUR PROGRAM Golf ball Wiffle ball Read the following examples and decide which law fits the situation. Write 1, 2, or 3 on the line to identify the law. 8. What force pulled the balls down the ramp? As the fuel in a rocket ignites, the force of the gas explosion pushes out the back of the rocket and pushes the rocket forward. 9. What force made them stop? When you are standing in a bus and the bus suddenly stops, your body continues to go forward. A pitched baseball goes faster than a pitched bowling ball. 10. Results: Which ball traveled the farthest? (circle one) Golf ball Wiffle ball A swimmer pushes water back with her arms, but her body moves forward. As an ice skater pushes harder with his leg muscles, he begins to move faster. 2. A boy is riding his bicycle and hits a stick. The bicycle stops, but the boy is thrown over the handlebars. Luckily, he s fine because he was wearing his helmet. Produced and published by the Education Division, The Cleveland Museum of Natural History, 1 Wade Oval Dr., University Circle, Cleveland, OH Last Updated 2/1/2015.
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