Learn about traits that are controlled by multiple genes and/or influenced by the environment. Understand penetrance and expressivity.

[Free Registration/Login may be required to access all resource tools.] Describe how the Renaissance period in history changed the approach to science. Identify the steps of the scientific method. Differentiate between the independent...

Students design, build and test model race cars made from simple materials (lifesaver-shaped candies, plastic drinking straws, Popsicle sticks, index cards, tape) as a way to explore independent, dependent and control variables. They...

Young scholars identify and control variables to design an experiment to see whether the temperature of a solvent affects the speed at which a solute dissolves.

This lesson will explain the difference between a control group and variable groups, when using the scientific method. It is 3 of 4 in the series titled "Control and Variable Groups."

This lesson will explain the difference between a control group and variable groups, when using the scientific method. It is 4 of 4 in the series titled "Control and Variable Groups."

This lesson will explain the difference between a control group and variable groups, when using the scientific method. It is 1 of 4 in the series titled "Control and Variable Groups."

This economics lesson explores what influences producers to supply in regard to demand. It examines fixed and variable costs, how such costs can be reduced, and how they influence production. Includes printable worksheets.

In this structured inquiry, students will investigate a catapult system. Having previously explored and identified the variables of the catapult system (length of lever, mass of shot, angle of catapult), students will conduct controlled...

[Free Registration/Login may be required to access all resource tools.] Experiments, experimental variables, and experimental controls are discussed.

This curricular unit contains two lessons that let students actually do the work of scientists as they design their own experiments to answer questions they generate. In the first lesson and its associated activity, students conduct a...

This site from Glencoe Publishing not only explains hypothesis but also tells how to design an experiment to test your hypothesis. Includes the difficult task of "Separating and controlling variables."

In this activity, students will design, conduct, and report the outcome of an experiment in which they investigate some factor that affects the rate of reaction between baking soda and vinegar. The dynamic nature of the reaction, coupled...

Test the efficacy of different types of hand hygiene to stem the transmission of diseases by conducting an experiment using variables and a control group.

This lesson will explain the difference between independent and dependent variables. It is 1 of 4 in the series titled "Independent/Dependent Variables."

A collection of video lectures from an industrial control course taught at the National Programme on Technology Enhanced Learning. The course teaches basic characteristics of feedback control systems, frequency-response analysis, and...

Students are challenged to design a way to drop a raw egg from varying heights without letting the egg break. Creative thinking and evaluation of results are critical to the project.

The purpose of this activity is to bring together the students' knowledge of engineering and airplanes and the creation of a glider model to determine how each modification affects the flight. The students will use a design procedure...

Students conduct a simple test to determine how many drops of each of three liquids can be placed on a penny before spilling over. The three liquids are water, rubbing alcohol, and vegetable oil; because of their different surface...

Lesson plan with mulitmedia links in which learners identify and control variables to help design a solubility test for different liquids in water.

Students conduct an experiment to determine how varying the composition of a construction material affects its strength. They make several adobe bricks with differing percentages of sand, soil, fibrous material and water. They test the...

Students work as engineers and learn to conduct controlled experiments by changing one experimental variable at a time to study its effect on the experiment outcome. Specifically, they conduct experiments to determine the angular...

Students work as engineers to design and test trebuchets (in this case LEGO MINDSTORMS robots) that can launch objects. During the testing stage, they change one variable at a time to study its effect on the outcome of their designs....

In an interactive and game-like manner, students learn about the mechanical advantage that is offered by gears. By virtue of the activity's mechatronics presentation, students learn to study a mechanical system as a dynamic system under...