Students learn the importance of heat transfer and heat conductance. Using hot plates, student groups measure the temperature change of a liquid over a set time period and use the gathered data to calculate the heat transfer that occurs. Then, as if they were engineers, students pool their results to discuss and determine the best fluid to use in a car radiator.

Students learn about friction and drag two different forces that convert energy of motion to heat. Both forces can act on a moving object and decrease its velocity. Students learn examples of friction and drag, and suggest ways to reduce the impact of these forces. The equation that governs common frictional forces is introduced, and during a hands-on activity, students experimentally measure a coefficient of friction.

Students are introduced to the nano-size length scale as they make measurements and calculate unit conversions. They measure common objects and convert their units to nanometers, giving them a simple reference frame for understanding the very small size of nanometers. Then, they compare provided length data from objects too small to measure, such as a human hair and a flea, giving them a comparative insight to the nanotechnology scale. Using familiar and common objects for comparison helps students understand more complex scientific concepts.

The resource "What is an operational amplifier?" is included in the "Electrical engineering" course from Khan Academy. This resource is one of the sub-topics in the "Amplifiers" topic area.

The resource "What is inside a DVD player? (1 of 5)" is included in the "Electrical engineering" course from Khan Academy. This resource is one of the sub-topics in the "Reverse engineering" topic area.

The resource "What is inside a DVD player? (2 of 5)" is included in the "Electrical engineering" course from Khan Academy. This resource is one of the sub-topics in the "Reverse engineering" topic area.

The resource "What is inside a DVD player? (3 of 5)" is included in the "Electrical engineering" course from Khan Academy. This resource is one of the sub-topics in the "Reverse engineering" topic area.

The resource "What is inside a DVD player? (4 of 5)" is included in the "Electrical engineering" course from Khan Academy. This resource is one of the sub-topics in the "Reverse engineering" topic area.

The resource "What is inside a DVD player? (5 of 5)" is included in the "Electrical engineering" course from Khan Academy. This resource is one of the sub-topics in the "Reverse engineering" topic area.

The resource "What is inside a coffee maker?" is included in the "Electrical engineering" course from Khan Academy. This resource is one of the sub-topics in the "Reverse engineering" topic area.

The resource "What is inside a digital camera? (2 of 2)" is included in the "Electrical engineering" course from Khan Academy. This resource is one of the sub-topics in the "Reverse engineering" topic area.

The resource "What is inside a hair dryer? (1 of 2)" is included in the "Electrical engineering" course from Khan Academy. This resource is one of the sub-topics in the "Reverse engineering" topic area.

The resource "What is inside a hair dryer? (2 of 2)" is included in the "Electrical engineering" course from Khan Academy. This resource is one of the sub-topics in the "Reverse engineering" topic area.

The resource "What is inside an alarm clock radio?" is included in the "Electrical engineering" course from Khan Academy. This resource is one of the sub-topics in the "Reverse engineering" topic area.

The resource "What is inside a tap light?" is included in the "Electrical engineering" course from Khan Academy. This resource is one of the sub-topics in the "Reverse engineering" topic area.

The resource "What is inside a universal remote control?" is included in the "Electrical engineering" course from Khan Academy. This resource is one of the sub-topics in the "Reverse engineering" topic area.

Students complete a self-guided exercise in worksheet format combined with Google Earth that helps them explore practical and observable differences between different projection and coordinate systems. The activity improves their skills in using various Google Earth features.

Students measure the wavelength of sounds and learn basic vocabulary associated with waves. As a class, they brainstorm the difference between two tuning forks and the sounds they produce. Then they come up with a way to measure that difference. Using a pipe in a graduated cylinder filled with water, students measure the wavelength of various tuning forks by finding the height the pipe must be held at to produce the loudest note. After calculating the wavelength and comparing it to the pitch of each tuning fork, students discover the relationship between wavelength and pitch.

This video from NOAA details their greenhouse gas monitoring process. The resource, "What's in the Air: How NOAA Monitors Greenhouse Gases in our Atmosphere Part 2" included in "Lesson 1 Sources of Atmospheric Carbon" is a part of "Unit 02 Atmospheric Carbon" included in Energy & Sustainability ES - Course 4.

Students use conductivity meters to measure various salt and water solutions, as indicated by the number of LEDs (light emitting diodes) that illuminate on the meter. Students create calibration curves using known amounts of table salt dissolved in water and their corresponding conductivity readings. Using their calibration curves, students estimate the total equivalent amount of salt contained in Gatorade (or other sports drinks and/or unknown salt solutions). This activity reinforces electrical engineering concepts, such as the relationship between electrical potential, current and resistance, as well as the typical circuitry components that represent these phenomena. The concept of conductors is extended to ions that are dissolved in solution to illustrate why electrolytic solutions support the passage of currents.