That Was Then, This Is Now

Determining whether or not something is living can be more difficult than it seems. Put your young scientists to work defining their own criteria to identify life, then work with three samples to see if they are alive or not. 

Your class won't get on your nerves while doing this modeling activity! After teaching the structure and function of a neuron using the included diagrams, give individuals some clay and chenille stems so that they can make their own...

How is the wind up there? The class builds a topography model using materials available in the classroom, then place wind flags in different locations on the landscape. Using a fan as a wind source, pupils collect data about how wind...

What does it cost to keep the lights on? Through a hands-on activity, class members use a watt meter and determine the amount of energy different types of light bulbs use. The class then determines the financial and environmental cost of...

Compare the volume of an orange to the volume of liquid that can be extracted out of it. Also compare the mass of an apple before and after it has been dried out. In both of these activities, children find that there is an appreciable...

Is it a bee or not a bee? That seems to be the question of a video lesson that explains how insects such as flies and moths mimic the coloring of bees. The narrator discusses the purpose of the coloring in association to predators.

What would happen if all of the land on Earth received as much rainfall as the temperate rain forest? The vast desserts would be altered, the animals would adapt or die, and the types of plants available would quickly shift. This is what...

Did you ever wonder why light can pass through glass? In an animated and narrated feature, find out how when heated to a high temperature, the molecular structure of silicon dioxide results in an amorphous structure and enough space...

How cool! This plan uses old cassette tapes to show frequency from traveling vibrations. To prepare for the lesson, tactile frequency diagrams are made and then placed near the video tapes or dominoes that are already set up. When they...

When you look out to the horizon, the earth looks flat, so how do we know it's round? We learn that gravity pulls planets toward the center and shapes them into the spheres that dominate space. This is a great clip that fully explains...