Cornell University
Splitting Water with Electricity
Explore how electricity splits water molecules into hydrogen and oxygen. Learners begin by calculating the voltage necessary to separate the water. They then perform the experiment and measure the ratio of hydrogen and oxygen bubbles.
Annenberg Foundation
Gothic Undercurrents
Terror, mystery, excitement. American writers of the 19th century, including Nathaniel Hawthorne, Herman Melville, and Emily Dickinson, used these elements to create morally ambiguous tales that challenged the prevailing belief in...
National Nanotechnology Infrastructure Network
Mixtures and Nanotechnology
What does size have to do with it? Learners analyze different mixtures, both homogeneous and heterogeneous, to discover the properties related to the size of their particles. The activity connects these properties to those of...
NASA
Christa's Lost Lesson: Effervescence
How are chemical reactions affected by gravity? Learners explore the phenomenon of effervescence as part of the Christa's Lost Lessons series. They compare findings in an experiment on effervescence to a video of a similar experiment in...
CK-12 Foundation
CK-12 Earth Science Concepts for Middle School
Explore a variety of science concepts in an interactive textbook created for middle school scholars. A lengthy table of contents takes readers to pages comprised of a subject overview, outline, and summary. Follow links further to find...
American Museum of Natural History
Around the World with DNA
DNA analysis could be what saves some animals from extinction. An interactive lesson shows learners how DNA information proves variation among animals of the same species and how stakeholders use that information to make decisions. Easy...
Curated OER
Friction Force
High schoolers investigate friction force on a variety of objects such as bricks and cardboard boxes. They use a force probe to collect data on the changes in force required to drag the objects across a variety of surface types.
Curated OER
Density and Buoyancy Experimental Design
Students must plan, design, and conduct an experiment that answers the scientific question: "Come up with a question that addresses the factors (variables) of the water and its effect on whether an object floats or sinks."
Curated OER
Seed Growth
Students develop an independent procedure to investigate the germination of two types of seeds. Students must construct data tables or charts to record observations and results, graph the data, and analyze the data.
Curated OER
Electric Circuits
Students determine the power dissipated in the combination of two resistors connected in series to a 6 volt battery. This task assesses students' abilities to develop procedures for an investigation, develop a plan for recording and...
Curated OER
Ice Cold
High schoolers design and conduct an experiment to investigate what happens when salt and ice come together and to determine if one form of salt is better for melting ice on steps and sidewalks.
Curated OER
That's the Way the Ball Bounces
Students investigate and compare the bouncing ability of the materials from which four different balls are made. They determine which material performs the best for use as a basketball. After collecting data in a small group they...
Curated OER
Ice Melting
Students design investigations to test various materials to prevent heat gain in frozen water. The task assess students' knowledge of scientific inquiry including the following skills: observation, data collection, measurement,...
Curated OER
Pendulums
Students construct a pendulums and experiment with what variables change or effect the rate at which they swing through an arc. They are assessed on scientific inquiry including the following skills: observation, data collection,...
Curated OER
Acid-Base Titration
Students determine the concentration of an unknown solution. This task assesses students' abilities to state hypothesis, develop procedures for investigation, plan for recording and organizing observations and data, collect data, create...
Curated OER
Insulators
Students design and carry out an investigation to test which materials is the best insulator: they predict which way heat energy flows in a system and analyze the flow of energy in a system from one point to another and from one form to...