Search Results
Showing results 21 to 40 of 437
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-647.png?itok=1bbf9lZ8)
Separating with Chromatography
Source Institutions
In this experiment, learners separate different types of molecules in marker inks (using a technique called "thin layer chromatography").
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-158.jpg?itok=W8Ro9IXo)
Animal & Plant Cell Slides
Source Institutions
In this activity, learners make slides of onion cells and their own cheek cells. Use this lab to teach learners how to prepare microscope slides and use a microscope.
Investigating Density Currents
Source Institutions
In this lab activity, learners explore how to initiate a density current. Learners measure six flasks with different concentrations of salt and water (colored blue).
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-616.png?itok=U2rlzHsa)
It's a Gas!
Source Institutions
In this simple activity, learners see the production of a gas, which visibly fills up a balloon placed over the neck of a bottle.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-861.gif?itok=umup6nux)
Modeling Limits to Cell Size
Source Institutions
This investigation provides learners with a hands-on activity that simulates the changing relationship of surface areas-to-volume for a growing cell.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-333.jpg?itok=LfEYC6s_)
Defining Density
Source Institutions
In this introductory demonstration and activity, learners are introduced to the concept of density as they explore a rock and a wooden block in water.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-441.jpg?itok=G3aZiNyD)
Ball Bounce Experiment
Source Institutions
In this activity, learners investigate the properties of different types of balls.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-791.gif?itok=uKnL0c9f)
Plot the Dot: A Graphical Approach to Density
Source Institutions
In this activity, learners work in groups to determine the mass and volume of four samples: glass marbles, steel washers or nuts, pieces of pine wood, and pieces of PVC pipe.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-544.png?itok=LawHMldb)
Surface Area and Soda Geysers
Source Institutions
This is an activity (located on page 4 of the PDF under Surface Area Activity) about surface area and reactivity.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-493.jpg?itok=c_b6UO1E)
Clear Slime Polymer
Source Institutions
In this chemistry activity, learners use guar gum to make slime. Use this activity to introduce learners to polymers, viscosity, and colloids.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-401.png?itok=_WlVFV-B)
Cooking with Chemistry
Source Institutions
In this activity, learners experiment with different variables in making hollandaise sauce to achieve the correct texture and consistency.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-958.jpg?itok=l_ePHvMt)
Solar Structures
Source Institutions
In this activity, learners explore how the power of the sun can be harnessed to heat and cool a building.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-429.jpg?itok=31DANnFf)
Sublime Sublimation
Source Institutions
In this activity, learners explore sublimation by conducting experiments with dry ice.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-578.jpg?itok=YSS4r3Hs)
Funny Putty
Source Institutions
In this chemistry activity (page 1 of PDF SciGirls Activity: Milk Carton Boat), learners will create a blob of stretchable funny putty out of a water, borax, and glue mixture.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-322.png?itok=koOK-mvw)
Plugged in to CO2
Source Institutions
In this activity, learners investigate various appliances and electronics, discovering how much energy each uses and how much carbon dioxide (CO2) is released to produce that energy.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-497.jpg?itok=Ph0OMHHW)
Measure the Speed of a Water Leak
Source Institutions
In this activity (page 2 of PDF under GPS: Glaciers Activity), learners will measure the rate at which water streams out of a leaky cup.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-597.jpg?itok=rj7w75Tz)
How Can Gravity Make Something Go Up?
Source Institutions
In this activity, learners use cheap, thin plastic garbage bags to quickly build a solar hot air balloon. In doing so, learners will explore why hot air rises.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-091.jpg?itok=dnG9Wyp8)
Good News: We're on the Rise!
Learners build a simple aneroid barometer to learn about changes in barometric pressure and weather forecasting. They observe their barometer and record data over a period of days.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-427.jpg?itok=yoqbLWIr)
Mold Growth
Source Institutions
In this activity learners observe mold growth on different types of bread by measuring and recording the growth rate.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-085.jpg?itok=9MLyH6MJ)
Acid Rain Effects
Learners conduct a simple experiment to model and explore the harmful effects of acid rain (vinegar) on living (green leaf and eggshell) and non-living (paper clip) objects.