Unit 4 — Forces and Motion - Ramps and Gravity
Description
Students investigate how forces such as gravity and friction affect motion by designing and building ramps. Using matchbox cars, ping-pong balls, marbles, and various surface materials, students conduct controlled experiments to test how different variables affect speed and distance. Students apply the engineering design process to solve the challenge of controlling motion over different surfaces. Data is graphed and analyzed to support conclusions about the relationship between friction, gravity, and design. This unit integrates science concepts with hands-on experimentation and data analysis.
Essential Questions
- How do gravity and friction affect an object's motion?
- How does the design of a surface change the speed of a moving object?
- What variables affect the distance an object travels?
- How do we use data to improve designs?
Learning Objectives
- Understand forces of gravity and friction through experimentation
- Design ramps using different materials and angles
- Test and measure the effects of surface properties on motion
- Collect, organize, and analyze motion data
- Use data to make predictions and improve designs
- Apply the engineering design process to motion challenges
- Communicate results using graphs and written explanations
Supplemental Resources
- Rulers and measuring tapes for recording distances
- Stopwatches for timing motion trials
- Graph paper for plotting data
- Markers for labeling materials and designs
- Clipboards for data collection during testing
Algorithms and Programming
Data and Analysis
Engineering Design
Crosscutting Concepts
Engineering, Technology, and Applications of Science
Digital Literacy
Measurement
Operations and Algebraic Thinking
Students write informative texts to explain engineering design processes and create digital stories about investigations. Students engage in collaborative discussions during design challenges and present findings about prototypes and solutions.
Students measure lengths of objects using appropriate tools and units, create bar graphs and picture graphs to represent data, and use addition and subtraction to solve word problems involving measurements and comparisons.
Formative Assessments
- Design and brainstorm ramp solutions
- Observation of ramp building and testing
- Measurement and recording of motion data
- Analysis and graphing of results
Summative Assessment
Completed ramp design project with data graphs and written evaluation of improvements
Benchmark Assessment
— not configured —
Alternative Assessment
Students may demonstrate understanding through hands-on manipulation of ramp materials and verbal explanation of how changes affect motion, with teacher observation and questioning in place of written data recording. Visual aids such as labeled diagrams or photographs of ramp setups may support students in explaining their observations.
IEP (Individualized Education Program)
Students may benefit from visual supports such as labeled diagrams of ramp components and step-by-step picture sequences that break the engineering design process into manageable stages. For data collection and written explanations, teachers should offer alternatives to independent writing, such as dictating observations to an adult, using sentence frames, or selecting from pre-labeled graph options, so the focus remains on science reasoning rather than recording mechanics. Providing a structured data table with pre-filled headings and frequent check-ins during hands-on experimentation will help students stay on track and experience success throughout the investigation.
Section 504
Students should be given extended time during measurement, recording, and graphing tasks, as the multi-step nature of ramp testing can require additional processing time. Preferential seating near the demonstration area and reduced auditory or visual distractions during experimental trials will help students maintain focus when observing and comparing motion results. Printed copies of any directions or data-recording steps displayed on the board should be provided so students can reference instructions independently during hands-on work.
ELL / MLL
Teachers should use physical demonstrations with the actual ramp materials to build understanding of key vocabulary such as gravity, friction, surface, speed, and distance before students begin their own investigations. Visual word banks with pictures paired to science terms, as well as labeled example data tables or graphs, will help students access the content and organize their findings. Where possible, allowing students to discuss observations with a partner who shares their home language before recording data supports both comprehension and scientific thinking.
At Risk (RTI)
Beginning with a teacher-guided exploration of one variable at a time — such as ramp angle before surface material — helps students build confidence and connect new ideas to what they already know about things rolling or sliding. Simplified recording sheets with fewer data points and visual prompts will reduce barriers to participation while keeping students engaged in the hands-on aspects of the unit. Frequent, brief check-ins during the design and testing phases allow teachers to provide positive reinforcement and redirect misconceptions early, ensuring students can access the core concepts of gravity and friction.
Gifted & Talented
Students who demonstrate early mastery of the basic force and motion concepts can be challenged to investigate multiple variables simultaneously and develop more sophisticated claims about how surface texture, ramp height, and object mass interact to affect motion outcomes. Encouraging these students to design their own controlled experiment with a self-generated question — and to evaluate the reliability of their data through repeated trials — deepens their understanding of scientific methodology. Teachers might also invite students to extend their graphing analysis by comparing across multiple design iterations and constructing a written argument, supported by their data, about which design most effectively controlled motion and why.