Different colors of the spectrum travel at different speeds through media, causing them to refract at different angles—which allows humans to see their colors. Through a simulation, pupils see how air, water, and other media bend light....

The Industrial Revolution: long hours, low pay, and unsafe conditions. An eye-opening activity explores the darker side of industry and exposes the realities of child labor with photos. Scholars view four photos from the famous...

A single slide introduces each of the following renewable energy sources: hydroelectric, wind, geothermal, solar, tidal, and biomass. This provides a succinct overview that you can use as a visual aid when you first introduce alternative...

Watch lightbulbs go off in learners' heads as they look at a patent for Thomas Edison's most famous invention. After examining the light bulb patent, young historians speculate on how the invention changed life in the 1880s and its...

Does natural light damage or repair DNA? Learn the answer discover the scientists who researched the topic with an online interactive. Scholars read through an online animation presenting the content at their own pace. Then, they read...

Why did the waves get into a fight? They were tired of each other's interference. Scholars observe the wave patterns from dripping water, sound waves, and light waves. They vary the spacing, build barriers, and increase the number...

In this online electricity worksheet, students are asked 10 questions about electric current and battery energy, an online answer key provided.

A red delicious apple tree with a simple mutation means we now benefit from the existence of golden delicious apples. Learn how simple mutations change genetic information in DNA sequences. Using biographies, videos, and animations,...

Set to upbeat instrumental background music, eight slides present pictures of electrical wires, batteries, and appliances, Each slide is accompanied by a few sentences that introduce viewers to concepts related to current electricity....

Electricity travels at the speed of light, 186,000 miles per second. Through a simulation, classes see how the structure of energy bands in crystals of atoms determines how materials conduct electricity. Participants can change the...

In this circuits worksheet, students are given 15 different scenarios to troubleshoot using the scientific method. Topics include electrical lights, "network" power cabling, gas pipelines and stereo systems.

For this online interactive English vocabulary skills worksheet, high schoolers answer 10 matching questions which require them to fill in the blanks in 10 sentences. Students may submit their answers to be scored.

In this ohmmeter worksheet, students are given ten questions about circuits and and the resistance in those circuits. They explain how an ohmmeter is used and answer questions about different wire systems and their resistance.

In this AC waveforms worksheet, students answer ten questions about AC voltage, frequencies of waveforms and they interpret diagrams of AC voltage.

In this circuits worksheet, students answer 24 questions about parallel DC circuits including finding the current drawn by resistors, the total resistance, and the voltage impressed across each resistor in the circuit. Students also...

In this ammeter learning exercise, students answer eleven questions about ammeters, multimeters and types of circuits. They identify different types of circuits given schematic diagrams.

In this electrical learning exercise, students answer a series of 27 open-ended questions pertaining to DC circuits by analyzing electrical schematics. This learning exercise is printable and there are on-line answers to the questions.

In this review worksheet, students complete sentences by filling in the blank. The students use comparatives, etc. The worksheet is intended to test the student's English Language skills.

In this online interactive reading comprehension worksheet, students respond to 12 multiple choice questions about Shakespeare's Measure for Measure. Students may submit their answers to be scored.

In this scientific notation worksheet, students complete 10 multiple choice questions containing numbers with decimals. Answers are given online.

In this on-line language arts worksheet, students complete 5 multiple choice questions where they choose the word that means the opposite of the bold word. Students can check their answers at the end of the worksheet.

Explore how light moves and describe how an object in a dark space only becomes visible when light moves into the space and illuminates it. Interactive activities, time-lapse videos, and images are used to enhance student observations as...

Examine how multiple light sources produce shadows of differing darkness and length. Move a player (with four light sources) around the field until your image matches the five other images on the page so you can identify where the player...

Apply the Schwarzschild metric to the paths light travels when it radiates in every direction near a black hole. Adjust the position of the light source and observe the effective potential of the paths.