This ray is resting on the ocean floor.
Click on image for full size
Windows Original, adapted from Corel Photography
Rays
Rays are really neat animals. They flow through the water like silk. Rays have soft, wide bodies. Some of them are dangerous, so you shouldn't try to touch them!
The manta ray is the biggest ray of all. It can reach 19 feet across. But it's actually very gentle and friendly. The smaller ones are usually much more dangerous! Some can shock you with electricity and others have sharp spikes on their tails.
Shop Windows to the Universe Science Store!
"
Ready, Set, SCIENCE!: Putting Research to Work in K-8 Science Classrooms", from the National Research Council, provides insight on the types of instructional experiences help K-8 students learn science with understanding. Check our other
books in our
online store.
You might also be interested in:
Jupiter's atmospheric environment is one of powerful winds, going 250 miles per hour, and temperatures from -270 degrees to +32 degrees (freezing temperature). These winds make it hard for life forms to
...more
In July, 1996 a team of scientists said that they had discovered possible fossils of bacteria in a meteorite named ALH84001 that came from Mars. It was found in Antarctica in 1984 after having landed there
...more
Saturn's atmospheric environment is one of powerful winds, going 250 miles per hour, and temperatures from -270 degrees to +80 degrees. With winds like these, it is hard to have peace and quiet. The region
...more
The air of Titan is a lot like the Earth's, except that it is very cold, from -330 degrees to -290 degrees! Like the Earth, there is a lot of Nitrogen and other complex molecules. There also may be an
...more
Organisms that are able to "make their own food" are called autotrophs, meaning "self-feeders". Some examples of autotrophs are plants and algae (shown in the picture). Both plants and algae use photosynthesis
...more
In the warm early ocean, large molecules came together into a form called *coacervates*. Molecules such as these will form coacervates in the same way that beads of vinegar in oil come together. These
...moreOver a very long time, gradual changes in the earliest cells gave rise to new life forms. These new cells were very different from earlier cells because they were able to get their energy from a different
...more
