Hummingbird Lunch

These daredevil birds can be perfect subjects for a backyard experiment.

Catch and Sketch Plankton

Learn to focus on detail and make keen observations that could be overlooked in a picture in this lesson on scientific sketching.

It’s a Plankton Eat Plankton World

During this activity you will learn how to create your own food web. You will also analyze the feeding relationships between marine organisms and describe the importance of plankton to the ecosystem.

A Nervous Experiment

Do you think you need the same number of nerves in every part of your body? Where in your body might you need more nerves? See for yourself!
Also in: Español

Manduca Caterpillar Growth Experiment

Dr. Biology has teamed up with with the scientists in the laboratory of Jon Harrison and started an experiment to see how different temperatures can change how an animal grows. The Virtual Manduca Growth Experiment lets you see and graph the results. It also has some cool animations.

Birds and Their Songs

We see them practically everywhere. They are found flying in the high mountains and soaring along the thermal winds in the low deserts. There are those that are reclusive and others you can watch from your own back yard.
Also in: Español

Your Dog's Personality

How well do you know your dog? You'll find out lots more about your pet's personality by answering the questions in this chart.

Heavy Water

This activity explores how the temperature of water affects its density. You will need to gather the following materials: a pencil; a small paper cup; a small-mouthed, clear-glass jar (the cup should be able to sit inside the opening of the jar); three ice cubes; and food coloring.

Dr. Biology's Virtual Pocket Seed Experiment

Dr. Biology has been busy working on a new experiment and he needs your help. He has collected so much information from the experiment that he needs someone to analyze the data. All the results have been recorded in photographs, including some cool animations.
Also in: Español | Français

Collecting Ants

There are several different ways to get ants for an ant farm, depending on when you would like to start the farm and how long you would like for your ant farm to last.