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Students explore the relationship between observations and measuring things in science. Specific ways of measuring length, mass, volume, and temperature are demonstrated using tools common to the classroom. Other terminology includes unit of measurement, meter stick, metric ruler, balance, graduated cylinder, and thermometer.
(Source: DCMP)
Scientists use magnetometers to study magnetic anomalies found on Mars. The MAVEN spacecraft carries two magnetometers to investigate the planet's magnetic field in order to understand how the Martian atmosphere and climate has evolved over time.
Nutritional disorders include any of the nutrient-related diseases and conditions that cause illness in humans. They may include deficiencies or excesses in the diet. Exercise and a healthy diet can help combat these disorders. Part of the "Human Nutrition" series.
Uses practical examples to help students understand and use the components of the scientific method. Concepts and terminology: hypothesis, experiment, measuring, data, analysis, and conclusion.
Demonstrates how to observe and record scientific observations. Concepts and terminology: observation, data, recording, data table, tools, safety, measuring, and graphs.
Part of the "A 3-D Demonstration" series. Explores how electric energy became an essential tool with the advent of electricity storage, allowing the flow of current to do useful work. Defines and examines conductors, insulators, voltage, and current, using a water flow model to help ensure understanding. Explains the difference between electron flow and current flow models. Also develops the nature of direct and alternating current (both one- and two-phase). Specific modules include Tapping a Source, Conductors and Insulators, Direction of Flow, Potential Difference, Measuring Voltage, Measuring Current, Alternating Current, and AC Voltage. Correlates to all National CTE Organizational Standards (including the provisions of the Perkins Act).
Students demonstrate the scientific method as they explore what makes popcorn pop.
Two young science students learn about measuring energy through calorimetry. They conduct experiments to measure the amount of energy in hay.
The concepts of reliability and validity are demonstrated through a simple exercise. Students learn the importance of consistency and interpreting data in a relevant manner when conducting experiments.
Presents three key physics concepts about force and motion: constant speed, acceleration, and gravity and falling. Each concept is illustrated with a variety of experiments and computer animation to illuminate what is happening both visibly and at the molecular level.
How does sound behave in different environments? A team answers this question by studying the acoustic energy and sound pressure levels of rock band playing in an indoor stadium. They compare their findings to recital taking place at an outdoor venue.
A scientist from NASA explains how to build an icy model of a comet, complete with shooting jets. This activity provides an opportunity for students to make observations, discuss changing states of matter, and demonstrate measuring skills. Part of the “DIY Space Classroom Activities” series.
Hear from a forest services manager who leads projects for forest health and sustainability. He discusses the importance of math, science, writing, and communication in the field of forestry. Learn about the many careers available in the area of natural sciences. Part of the "Career Connections" series.
Explore what makes Mercury so mysterious and what scientists are learning from NASA's first Mercury mission in 30 years. For the MESSENGER mission, NASA launched a probe and guided it toward Mercury using a technique called "solar sailing." The probe is studying the make-up of the planet's inner core and surface and measuring its magnetic field.
How far is a star or a galaxy? Scaling and measuring the cosmos is a complex problem. Scientists are integrating mathematical applications and scientific technology to create measurement standards. Distances are so vast they are described in light years, and nearby stars are measured by trigonometry. Farther out, astronomers use standard candle measurement for deep space exploration.
It started as a project for long term space survival, when NASA estimated that crews headed to or living on Mars would spend 80% of their waking hours farming. But, with support from the National Science Foundation, research into a leaf sensor that could “call in” with its vital statistics morphed into technology that can help farmers on this planet. The goal is to save water by directly measuring a plant’s moisture level.
It’s a freezing cold day inside the National Ice Core Laboratory (NICL) in Denver, Colorado. That’s because the NICL is a facility for storing and studying ice cores recovered from the polar regions of the world. And, saws are buzzing, as scientists from all over the U.S. are measuring and cutting pieces of precious Antarctic glacier ice to take back to their labs for research. Part of the National Science Foundation Series “Science Nation.”
Using mud, clay, and tons of stone, ancient civilizations built buildings and monuments that are still standing today. The Egyptians built the Great Pyramid with an accurate measuring system, the ability to calculate areas and volumes of triangles, and a tremendous workforce that transported 1,000 tons of stone each day for 15 years. Other civilizations, such as the Romans, created marvels of engineering like the dome of the Pantheon, and built clean cities that included conveniences such as water management and sewers.
Preserving the environment and developing agricultural products that do not harm unintended targets are top priorities for many scientists and farmers. It’s a new era of crop management known as precision agriculture. It maximizes productivity while minimizing energy use and environmental impacts. One of the major challenges being addressed by precision agriculture is over-fertilization. Support from the National Science Foundation (NSF) has led to the development by startup SupraSensor Technologies of a novel sensor to detect nitrate fertilizer in soil. The SupraSensor device is designed to give farmers a highly accurate, virtually constant stream of data on nitrate levels. Part of the National Science Foundation Series “Science Nation.”
University of Rochester electrical engineer Mark Bocko has combined his passion for music with his passion for engineering, devising a way to digitally compress music files. Bocko’s team of engineers and musicians at Rochester’s Eastman School of Music are also helping uncover some extraordinarily precise details about just how music is made. With support from the National Science Foundation, they have built a computer model of the clarinet, entirely from real world acoustical measurements taken from human musicians. Measuring such things as how hard the musician is blowing into the instrument and the pressure the musician applies to the reed, they have modeled the way music is made.
