5.2.4.E 4th grade Standard: Physical Science: Physical science principles, including fundamental ideas about matter, energy, and motion, are powerful conceptual tools for making sense of phenomena in physical, living, and Earth systems science. (5.2) Strand: Forces and Motion: It takes energy to change the motion of objects. The energy change is understood in terms of forces. (5.2.E) Unit/ Chapter Unit F Chapter 1 Chapter 2 Essential Question How can energy be transferred from one material to another? What happens to a material when energy is transferred to it? Content Statements Motion can be described as a change in position over a period of time. There is always a force involved when something starts moving or changes its speed or direction of motion. A greater force can make an Enduring Understanding Changes take place because of the transfer of energy. Labs, Investigation, and Student Experiences 5.2.4.E.1 Resources National Science Digital Library, Science Digital Literacy Maps: The Physical Setting: Laws of Motion http://strandmaps.nsdl.org/?id=SMS-MAP-1357 Energy is transferred to matter through the action of forces. Different forces are responsible for the transfer of the different forms of energy. 5.2.4.E.2 Conduct an investigation with motion and forces. Using a ramp, toy car, meter stick and stopwatch, record the time it takes for the car to travel down the ramp. http://nsdl.org/refreshers/science/ Cumulative Progress Indicators Demonstrate through modeling that motion is a change in position over a period of time. (5.2.4.E.1) Identify the force that starts something moving or changes its speed or direction of motion. (5.2.4.E.2) National Science Digital Library, Science Refreshers Discuss the forces at work on the car and predict ways to make the car travel farther, slower and faster. Generate explanations based on evidence. Complete Investigation on page F54- F55 “Forces on a Sliding Box”. In this investigation, you will measure the force that you need to slide a box across several different materials. You will order the measurements and use them to compare the materials. Resources National Science Digital Library, Science Digital Literacy Maps The Physical Setting: Laws of Motion http://strandmaps.nsdl.org/?id=SMS-MAP-1357 National Science Digital Library, Science Refreshers http://nsdl.org/refreshers/science/ 5.2.4.E.3 Investigate and categorize Time Frame 20-21 Days 5.2.4.E 4th grade object move faster and farther. Magnets can repel or attract other magnets, but they attract all matter made of iron. Magnets can make some things move without being touched. materials based on their interaction with magnets. (5.2.4.E.3) Look at various objects, make predictions about whether they were magnetic, and then test their predictions. This exploration is an introductory activity to magnets and magnetism. (See ScienceNetLinks: Magnets 1: Magnetic Pick-ups Investigate, construct, and generalize rules for the effect that force of gravity has on balls of different sizes and weights. (5.2.4.E.4) Earth pulls down on all objects with a force called gravity. Weight is a measure of how strongly an object is pulled down toward the ground by gravity. With a few exceptions, objects fall to the ground no matter where they are on Earth. Desired Results/Assessments Sample Assessments 5.2.4.E.1 To show evidence of meeting this CPI, students may answer the following questions: Observe moving objects and create symbolic representations that describe their motion. Note: The graph or model should include http://www.sciencenetlinks.com/lessons.php?BenchmarkID=4&DocID=175) Discover how barriers and increased distance can vary the strength of a magnet. (See ScienceNetLinks: Magnets 2: How Strong is Your Magnet? http://www.sciencenetlinks.com/lessons.php?DocID=159 Resources National Science Digital Library, Science Digital Literacy Maps The Physical Setting: Electricity and Magnetism http://strandmaps.nsdl.org/?id=SMS-MAP-1332 National Science Digital Library, Science Refreshers http://nsdl.org/refreshers/science/ 5.2.4.E.4 Investigate techniques to make careful observations of the relative time of fall for objects dropped of different masses from the same height at the same instant. Use the evidence to explore generalized rules governing the force of gravity. Predict, with reasoning, which would land first, a feather or a hammer, if they were dropped at the same time. Then watch as Apollo 15 astronaut Dave Scott recreates Galileo’s famous gravity experiment while on the surface of the moon. Using conceptual understanding of gravity, explain the results of Dave Scott’s experiment. The Hammer and Feather video is available at: http://www.youtube.com/watch?v=4mTsrRZEMwA Note: With a few exceptions, objects fall to the ground no matter where they are on Earth. Note: Weight and mass are not the same thing. Mass is a measure of how much matter an object is made of. Weight is a measure of the force of gravity on that mass. This is why a person weighs different amounts on Earth than s/he does on Saturn. Note: Controlling for wind resistance, objects with different masses will fall at the same speed. For example, a falcon feather and a hammer will 5.2.4.E 4th grade the distance an object moved and the time it took for it to move that distance. 5.2.4.E.2 Use the picture below of Sharon pulling a wagon on a level sidewalk to answer questions 1 and 2. land at the same instant if an astronaut drops them at the same time in a near vacuum. Replicate and explain at least one of Galileo's investigations. Use online and text resources to compile information about the work Galileo did in studying gravity's effect on falling objects. Resources National Science Digital Library, Science Digital Literacy Maps: The Physical Setting: Conservation of Matter http://strandmaps.nsdl.org/?id=SMS-MAP-1372 National Science Digital Library, Science Refreshers http://nsdl.org/refreshers/science/ 1. How would the movement of the wagon be affected if she pulled harder on the wagon? (VA) 2. How would the movement of the wagon be affected if her little brother were sitting in the wagon? (VA) 3. A person pushes a box as shown. What is the push most likely to change? A. The size of the box B. The mass of the box C. The color of the box D. The position of the box (VA) Two different-shaped objects were dropped from the same height. Data from the investigation was recorded, as shown below. 5.2.4.E 4th grade 4. Explain why the average times to fall were different for the two objects. In the explanation be sure to include: the errors in this investigation how these errors affected the outcome how the investigation should be improved to obtain valid data (MD) 5.2.4.E.3 Different materials are attracted by magnets. 1. Which items are attracted by a magnet? A. copper cylinder and iron nail B. steel paper clip and iron nail C. steel paper clip and copper cylinder D. aluminum washer and steel paper clip (MD) 2. What makes the needle on the compass in the picture point north? A. rainfall B. evaporation C. wind currents D. magnetism 5.2.4.E 4th grade (VA) 3. An object is placed on a table. A magnet is slowly moved toward it and the object moves away from the magnet. The object is most likely — A. another magnet B. a piece of glass C. a copper coin D. an iron nail (VA) 4. Explain how two magnets react when placed near each other, including the properties of magnets. Use Chapter Assessment 5.2.4.E 4th grade