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Book Chapter
Sweet Genes in Corn (Student Edition)
One of the joys of summer is sweet, fresh, crisp corn on the cob. Most corn is starchy and usually does not taste sweet. Why isn't corn on the cob sta...
Book Chapter
Centers of Diversity (Student Edition)
What country do you think is the origin of the tomato? In this chapter, tables and graphs are used to understand the relationship between food plants ...
Book Chapter
Quantitative Traits (Student Edition)
This chapter focuses on Quantitative trait loci (QTL) studies—a way of investigating quantitative traits where many genes have an effect on a trait....
Book Chapter
Galileo's track is made from one long continuous rail that joins two different angled ramps together. The first ramp has a short, steep slope. After a...
Book Chapter
In the demonstration in this chapter, a person holds a large foam board and a small brass weight to compare their respective weights. After hefting bo...
Book Chapter
This chapter features small wooden or cardboard boxes that hang about 5 feet from the ceiling on a short length of string. A second string comes out o...
Book Chapter
Blowing up a balloon inside a bottle is difficult if there is no place for the air to be displaced. Once a balloon is blown up inside the bottle, the ...
Book Chapter
In this chapter, a board is set up with three surfaces. The students' hands compare the relative temperature of the surfaces on the board, and the boa...
Book Chapter
In this chapter, the words "What color is inside?" appear around a hole on top of a can. The outside is multicolored, indicating that any of a number ...
Book Chapter
The device in this chapter shows how a thermostat works by turning a lightbulb on and off as the thermostat responds to the heat of the bulb. It can u...
Book Chapter
This chapter focuses on the use of some very simple materials to produce an electric motor with which to demonstrate the principles of magnetism. A va...
Book Chapter
The principle of a lightbulb can be demonstrated without the danger of creating a vacuum inside a glass jar. One of the difficulties in demonstrating ...
Book Chapter
Tops are ancient toys that have been spinning around for thousands of years. Their movement—fascinating to watch—appeals to the child in all of us...
Book Chapter
Newton's first law of motion describes the resistance of an object to change in the speed and direction of its motion. The law also holds that object...
Book Chapter
Examples of resonance can be shown by using a variety of pendulum demonstrations. This chapter features a coupled pendulum and a Wilberforce pendulum....