Sea stars live in low tide areas and eat both plants and animals. On the underside of sea stars' arms are tube feet which use water and muscular forces to suction to rocks, move, and capture prey.
Sea Lion Skeleton - Skull
The carnivorous sea lion uses its sharp pointed teeth and large mouth to shred and tear its prey. The large nose and large eyes on either side of the skull help the sea lion to detect prey. The skull protects the brain from damage and injury.
The Remarkable Cocklebur: Worldwide Hitchhiker and Nature's Velcro
This essay from Wayne's Word explores the hitchhiking method of seed dispersal, and how a closer look at one of these bur plants gave rise to an invention.
Serial Dilution of Food Coloring Dye
Students use dyes to explore serial dilution, an important technique in physical science and engineering. Students systematically dilute solutions of food coloring with pure water. They observe how the color intensity, or saturation, of each subsequent solution changes. They also keep a running calculation of the concentration of drops per ml water. They apply what they learn to discussions of biomedical engineers working with cells.
How Many Drops?
In this lesson and its associated activity, 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 tensions, more water can be piled on top of a penny than either of the other two liquids. However, this is not the main point of the activity. Instead, students are asked to come up with an explanation for their observations
Making Decisions: Packaging and the Environment
This activity has students redesign and justify the packaging currently used in some consumer products. Design criteria include reducing the amount of packaging material by 25%.
Floaters and Sinkers: Curricular Unit
This curricular unit introduces students to the important concept of density. The focus is on the more easily understood densities of solids, but students can also explore the densities of liquids and gases. Students devise methods to determine the densities of solid objects, including the method of water displacement to determine volumes of irregularly-shaped objects. By comparing densities of various solids to the density of water, and by considering the behavior of different solids when place
To learn how friction affects motion, students explore how different textures provide varying amounts of friction to objects moving across them. They build a tool to measure the amount of friction between a note card and various surfaces by measuring the distance that a rubber band stretches. They experiment with a range of materials to determine which provides the least/most friction.
Printable worksheet that requires students to write simple postcards. It can be expanded as pupils' confidence grows.
Les Couleurs - Quiz
How well do you know your colors in French?
Cape Hatteras Flyby 2
A flyby from Albemarle Sound to the Cape Hatteras National Seashore in North Carolina, using Landsat data
San Francisco Onion Layers (432) and zoom to San Jose
An animation of Landsat spectral bands, followed by a zoom to San Jose, California.
The most stunning sport moment
You can take part in an informal conversation among colleagues about personal interests and hobbies.
PediNeuroLogic Exam: Newborn: Normal: Tone - Arm Recoil
Arm recoil tests tone and action of the biceps. The arms are held in flexion against the chest for a few seconds, then are quickly extended and released. The arms should spring back to the flexed position. The hypotonic infant will have slow incomplete recoil. Asymmetry to this response with lack of recoil would be seen with Erb's or brachial plexus palsy. A neuroscience tutorial focusing on those aspects of the pediatric neurological examination that are unique to the child's nervous system, wi
Construct And Test Roofs for Different Climates
We design and create objects to make our lives easier and more comfortable. The houses in which we live are an excellent example of this. Depending on your local climate, the features of your house will be different to satisfy your particular needs; protection from hot, cold, windy, and/or rainy weather. Students should be aware of the different types of roofs found on various houses in different environments throughout the world. This can be done with books and photos. Models of the houses will
Nutritional Health,Food Production,and the Environment
This course provides an understanding of the complex and challenging public health issue of food security and in a world where one billion people are under-nourished while another billion are overweight. Explores the connections among diet, the current food production system, the environment and public health, considering factors such as economics, population and equity. Case studies are used to examine these complex relationships and as well as alternative approaches to achieving both local and
This patient education program explains the causes and types of anthrax. It also reviews the symptoms, diagnosis, treatment, and prevention of anthrax through vaccination and awareness of bioterrorism. This resource is a MEDLINEplus Interactive Health Tutorial from the National Library of Medicine, designed and developed by the Patient Education Institute.
Solar Sigmoid: Zoom In, Move Around, Pull Back
Solar sigmoid on the sun indicating possible pending coronal mass ejection.
Seasonal NDVI for Africa. 1981-2000 averaged without month notation.
Seasonal NDVI for Africa. 1981-2000 averaged without month notation. 15 frames-month
The Magnetosphere - Earth Raises its Shields
A view of a computer-generated model of the Earth's magnetosphere. Semi-transparent surfaces represent particle density (red is high, blue is low) and silvery tubes represent the magnetic field lines. In this particular model, the solar wind has an ambient density of 8.35 particles-cm^3. The isosurfaces are then red (>17 particles-cm^3), yellow (>12 particles-cm^3), green (>8.6 particles-cm^3) and blue (<1.0 particle-cm^3).