The feedback mechanisms of metabolism of a variety of substances in the human body. Carbohydrates, lipids, amino acids, and their derivatives are explained. The biochemistry required to explain the metabolic balance and feedback controls...

High schoolers explain how a feedback control system works. They model a feedback control mechanism for controlling water level by observing the flow rate of water in a cylinder. In addition, they graph their data. Script for activity...

Given four suggested concepts, emerging electrical engineers research, design, and constuct a working device that willrespond to changes in the intesnisty or the direction of sunlight. This is a challenge for learners to rise to, as the...

Many glands work together to control hormone levels in the body. The interactive focuses on the thyroid gland, pituitary gland, and the hypothalamus. It demonstrates the interconnections and feedback loops present in the endocrine system.

Starting with a diagram of the kidneys and urinary tract of the human, this sheet has questions about excretion, blood concentrations of hormones, gland feedback mechanisms and the effects of some hormones.

A nicely formatted set of slides that logically follow and define the structure and function of the genes in Bacteria. The repressor proteins and other gene regulators are listed and diagrams support the explanations of their function on...

Whether you're battling the flu or trying to warm up on a chilly day, your body's ability to react to temperature change is fascinating! Anatomy scholars discover the fantastic feedback loops that control body temperature in a rigorous...

Middle school scientists learn the steps of the scientific method by watching this phenomenal film and by singing a karaoke song! They are introduced to making observations and hypotheses, determining variables, data collection, and...

It's electric! Young anatomists use Virtual Neurons software to build, control, and analyze complex nerve circuits within the body. Colorful and packed with content, class members enjoy interacting with the nervous system...

Students investigate how cells determine which genes will be expressed and which will be silent. In this genetics instructional activity, students use on-line resources to complete a worksheet and gather information about gene...

Learners explain what biodegradable materials are and list examples of them. They design, with online partners' feedback and input, a product made of biodegradable materials and develop a marketing campaign to best sell their product.

Students identify and test variables that may affect the accuracy of a rain gauge. They share findings of their research with the class in a 'mini-meteorology-convention'. They design an experiment with a control setup to test their...

Students build a feedback-controlled system (a water clock) and research ways to improve the system design.

Young scholars read various arguments posed by John Dewey when it comes to population growth. In groups, they use magazine articles and the internet to find issues related to populations and complete experiments to identify the...

Protect skin from UV radiation! Groups design and conduct an experiment to test the effectiveness of UV safety products. The groups collect the data from the experiment and prepare a lab report. In the second day of the activity,...

What happens to stars as they get older? A simulation takes pupils through the life cycle of stars based on their masses. The resource introduces the Hertzsprung-Russell diagram and the common relationships and life cycle patterns observed.

Is it me, or is it getting hot in here? Middle school science sleuths investigate the relationship between temperature and pressure, then use their observations to form a hypothesis. Questions embedded in the interactive help guide...

From any angle, this interactive is helpful. Earth science super stars explore a location's angle from the equator through a hands-on activity. Questions guide learners as they test their knowledge of direction and geometry used in...

To what degree do learners understand coordinates? Get them some practice in Yosemite National Park in a simple, fun interactive. Pupils explore a map and locate coordinates of popular sights within the park, then answer questions...

Do predators look for different things in different seasons? The quick interactive shows how some species survive longer in one season than another based on the conditions. The challenge questions encourage pupils to demonstrate that...

Scientific procedures ensure valid data and valid results. Use a water sampling interactive to teach learners the procedures for collecting water samples. The interactive takes users through the process step-by-step with notes of...

In this DNA worksheet, students access a website to learn about how single-celled organisms function successfully. Then students pretend they are a bacterium and determine how to transport lactose across their cell membrane for food....

Students explore the control of expression of DNA into proteins which is divided into two main categories: transcriptional and post-transcriptional. They construct examples of the control mechanisms and discuss disease processes that...

Students examine an industrial disaster in India which affected the food for generations to come. In groups, they research the history of pesticides and place them into groups based on the type of pests they control. They partcipate in...