Search Results
Showing results 81 to 100 of 169
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-566.png?itok=5eACS57p)
Mirror, Mirror
Source Institutions
In this activity, learners test the Law of Reflection based on experimental evidence. Learners produce raw data and explanations based on their data: pencil tracings of incident and reflection rays.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-711.gif?itok=x43RDsEk)
Personal Pinhole Theater
Source Institutions
Have you ever heard of a camera without a lens? In this activity, learners create a pinhole camera out of simple materials. They'll see the world in a whole new way: upside down and backwards!
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-282.png?itok=ntwezJoy)
Telescopes as Time Machines
Source Institutions
This fun, nighttime hands-on astronomy activity lets learners explore how long it takes for light from different objects in the universe to reach Earth.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-347.jpg?itok=5KNlSGyV)
Seeing in the Dark
Source Institutions
In this activity (17th on the page), learners investigate why you cannot see colors in dim light.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-498.jpg?itok=XfwT9bP_)
Critical Angle
Source Institutions
In this optics activity, learners examine how a transparent material such as glass or water can actually reflect light better than any mirror.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-752.jpg?itok=ZY7E7FZM)
Measure the Sun's Size
Source Institutions
In this activity, learners make their own pinhole viewer in order to measure the size of the sun.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-401.gif?itok=nPz6ngNM)
The Senses of "Unknown Creatures"
Source Institutions
In this activity, learners use earthworms as "unknown creatures" from the South American jungle to find out how animals use senses.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-460.jpg?itok=TIUyWvZh)
LEGO Orrery
Source Institutions
Use this model to demonstrate the goal of NASA's Kepler Mission: to find extrasolar planets through the transit method.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-749.jpg?itok=UIT5d4EF)
How Our Environment Affects Color Vision
Source Institutions
In this lab (Activity #1 on page), learners explore how we see color.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-118.jpg?itok=3-FkNj2C)
Stroboscope
Source Institutions
In this activity (posted on March 20, 2011), learners follow the steps to construct a stroboscope, a device that exploits the persistence of vision to make moving objects appear slow or stationary.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-513.jpg?itok=OYOp0tgC)
Exploring Materials: Graphene
Source Institutions
In this activity, learners investigate the properties of graphene and graphite.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-000-980.png?itok=TrfHl0vw)
Marble Mazes
Source Institutions
In this activity, learners create a marble maze that contains sensors. As a metal marble triggers the sensors, the Pico Cricket turns on lights or spins motors.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-859.jpg?itok=iBu9nBMp)
Underwater Hide and Seek
Source Institutions
In this activity, learners experience firsthand how marine animals' adaptive coloration camouflages them from prey.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-212.jpg?itok=TafDrn3f)
Moldy Jell-O
Source Institutions
In this laboratory activity, learners design an experiment to evaluate how environmental factors influence the growth of molds.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-567.jpg?itok=8G1HykGk)
Hot Air
Source Institutions
In this activity, learners set up an experiment to investigate the effects of hot air on the path of a laser beam.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-000-162.png?itok=LuX9o22Y)
Pico Cricket (Tiny Computer) Activity Ideas
Source Institutions
This is a web page that helps informal educators brainstorm on how to use a Pico Cricket (tiny computer) in an informal activity.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-516.jpg?itok=ZONU1k8p)
Exploring Ultraviolet (UV) light from the Sun
Source Institutions
In this outdoor activity, learners explore UV rays from the Sun and ways to protect against these potentially harmful rays.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-657.jpg?itok=niI3vpw5)
Color Table: Color your perception
Source Institutions
Look at pictures through different color filters and you'll see them in a new way. People have used color filters in beautiful photography or sending secret messages.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-230.png?itok=KTkqHzuO)
Terrestrial Hi-Lo Hunt
Source Institutions
In this outdoor activity, learners search for the warmest and coolest, windiest and calmest, wettest and driest, and brightest and darkest spots in an area.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-838.jpg?itok=3uX7hskU)
Photosynthetic Pictures Are Worth More Than a Thousand Words
Source Institutions
This activity provides an opportunity for learners to observe and examine how carbon dioxide, water, and light produce glucose/starch through a process called photosynthesis.