NDLI: Guest

A Little Atmosphere

Source: Exploratorium

eng

Published on: 2017-12-01

The earth’s atmosphere may seem thick when compared to something like your height—but it’s surprisingly thin when compared to the earth’s radius. Here, you can find out exactly how thin, using strips of plastic to model the correctly scaled thickness of the atmosphere on a globe. View more

A Splash of Color

Source: Exploratorium

eng

Published on: 2019-01-04

Clearly, pure water is perfectly clear…isn’t it? Find out for yourself by filling a tall plastic tube with water.

Afterimage

Source: Exploratorium

eng

Published on: 2015-02-26

After looking at something bright, such as a lamp or a camera flash, you may continue to see an image of that object when you look away. This lingering visual impression is called an afterimage.

Agar Cell Diffusion

Source: Exploratorium

eng

Published on: 2015-02-26

All biological cells require the transport of materials across the plasma membrane into and out of the cell. By infusing cubes of agar with a pH indicator, and then soaking the treated cubes in vinegar, you can model how diffusion occurs in cells. Then, by observing cubes of different sizes, you can discover why larger cells might need extra help to transport materials. View more

Aluminum-Air Battery

Source: Exploratorium

eng

Published on: 2015-02-26

Use aluminum foil, salt water, and activated charcoal to construct a simple battery strong enough to power a small motor or light.

Ambiguous Cube

Source: Exploratorium

eng

Published on: 2017-11-27

Some objects or figures are “ambiguous,” providing visual input that your brain can interpret in more than one way. In this Snack, you’ll construct a three-dimensional cube that exhibits ambiguous behavior when viewed with one eye. View more

Ames Chair

Source: Exploratorium

eng

Published on: 2018-03-15

Short pieces of chenille stem arranged inside a box look like a random jumble of line segments—until viewed in the proper perspective. Note: This activity is detail oriented and time intensive. It’s done by threading a long length of fishing line through twenty small holes, and then attaching short pieces of chenille stem to create a suspended pattern. When you look through a viewing hole, that random-looking pattern resolves into the form of a chair. If you think being a watchmaker ... View more

Anti-Gravity Mirror

Source: Exploratorium

eng

Published on: 2015-03-18

A reflection of your right side can appear to be your left side. Try this activity and you'll appear to perform many gravity-defying stunts.

Anti-Sound Spring

Source: Exploratorium

eng

Published on: 2015-05-08

In this simple exploration, a coiled phone cord slows the motion of a wave so you can see how a single pulse travels and what happens when two traveling wave pulses meet in the middle.

Avalanche

Source: Exploratorium

eng

Published on: 2015-03-18

What starts out as a cascade of well-mixed granular materials sorts itself into alternating layers of salt and sand.

Backyard Bug Bonanza

Source: Exploratorium

eng

Published on: 2018-01-24

Insects are the world’s most diverse group of living things, with over 950,000 identified species and counting. You might think that you’d need to travel to the Amazon to study insects, but they can be found practically everywhere—including right where you happen to be. View more

Bacteria Culture Club

Source: Exploratorium

eng

Published on: 2015-02-26

Yogurt is the byproduct of hungry bacteria that digest the lactose in milk. You can make more yogurt just by feeding the bacteria more milk.

Balancing Ball

Source: Exploratorium

eng

Published on: 2015-02-26

A ball stably levitated on an invisible stream of air is a dramatic sight. Try to pull the ball out of the air stream—you can feel a force pulling it back in. You can also feel that the air stream is being deflected by the ball. This activity shows the force that gives airplanes lift. View more

Balancing Stick

Source: Exploratorium

eng

Published on: 2015-03-18

The distribution of the mass of an object determines the position of its center of gravity, its angular momentum, and your ability to balance it.

Bean-Counter Evolution

Source: Exploratorium

eng

Published on: 2015-02-26

In this simulation game, teams of predators equipped with genetically different “mouths” (utensils) hunt for “prey” (assorted beans). Over several “generations” of play, the fittest among the predators and prey dominate the population, modeling the evolutionary process of natural selection. Note: This game works best with a group of 15 or more people. See Teaching Tips, below, for ways to accommodate smaller groups. View more

Bee Hummer

Source: Exploratorium

eng

Published on: 2015-05-08

When you spin it around, this toy sounds like a swarm of buzzing bees.

Benham's Disk

Source: Exploratorium

eng

Published on: 2015-03-18

Rotate this black-and-white pattern at the right speed, and the pattern appears to contain colored rings. You see color because different color receptors in your eyes respond at different rates.

Bernoulli Levitator

Source: Exploratorium

eng

Published on: 2015-03-18

The Bernoulli principle explains how atomizers work and why windows are sometimes sucked out of their frames as two trains rush past each other. Choose from two versions of this Snack—small or large. View more

Bicycle Wheel Gyro

Source: Exploratorium

eng

Published on: 2015-03-18

A spinning bicycle wheel resists efforts to tilt it and point the axle in a new direction. Any rapidly spinning wheel exhibits this gyroscopic property—and you can use this tendency to take yourself for a spin. View more

Bird in a Cage

Source: Exploratorium

eng

Published on: 2015-02-26

You see color when receptor cells (called cones) in your eye’s retina are stimulated by light. There are three types of cones, and each is sensitive to a particular color range. If one or more of the three types of cones adapts to a stimulus because of long exposure, it responds less strongly than it normally would. View more

Type in keywords in the above query-box

Query keywords can be specified in English, and a few other Indian languages

To change your search language, select the language from the language button on the right side of query box, then type in roman script and select one from suggested list appearing below

Click on a facet (e.g. Author/Source) that appears on the left

Click the item(s) of your interest to refine search results

Selected filter(s) will appear as breadcrumbs on top of search result panel

Click on any of the icon button (e.g. Text, Video) appearing on right to view results particular type of content

Click on a content type icon above to browse contents of that particular type

Click on a facet (e.g. Author/Source) that appears on the left

Click the item(s) of your interest to refine search results

Selected filter(s) will appear as breadcrumbs on top of search result panel

Click on First level subject and select one from the list

To refine click on Second level subject (if available) and select one from the list

To refine more click on Third level subject (if available) and select one from the list

Click on a facet (e.g. Author/Source) that appears on the left

Click the item(s) of your interest to refine search results

Selected filter(s) will appear as breadcrumbs on top of search result panel

Click on a source icon above to browse contents from that source

Click on a next / previous button on sides to scroll the featured sources

Click on List of all sources box to view list of all sources integrated to NDLI

Click on a facet (e.g. Author/Source) that appears on the left

Click the item(s) of your interest to refine search results

Selected filter(s) will appear as breadcrumbs on top of search result panel

Click on a learning resource type icon above to browse contents of that particular type

Click on a facet (e.g. Author/Source) that appears on the left

Click the item(s) of your interest to refine search results

Selected filter(s) will appear as breadcrumbs on top of search result panel

Refine search results

Refine browse results

Invalid search keyword

Information

Error

Feedback

About NDLI

Disclaimer

Sponsor