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Earth Science

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Videos
Cloud Formation, Part 2 The role of convection in forming clouds
Cloud Formation, Part 1 How clouds form, part 1
Weathering and Erosion What is the difference between weathering and erosion?
Law of Superposition Reading the Rocks: Which is oldest?
Law of Crosscutting Reading the Rocks: Which is oldest?
Looking at the Present Reading the Rocks: Past and Present
Nephoscope Build a simple device for detecting cloud movement.
Cloud Types How to identify basic cloud types
Building a Rain Gauge For such a simple device, rain gauges can tell us incredible things.
Building a Rain Gauge, part 2 Take the next step in exploring rain.
A Model of the Water Cycle Make a scientific model of the water cycle.
Igneous Sugar Make rock candy to explore the difference between magma and lava.
Faults What is a fault? How do they form? What can they tell us about the Earth?
Paleo Cookies Combine science and chocolate to learn about paleontology.
Looking for Rainbows The amazing science of rainbows.
Measuring Lightning Use the Flash-Bang method to measure how far away the bolt was, and how long it was.
Planets and Pennies Try this easy way to visualize how gravity differs from planet to planet.
Ice and Soda Try this old trick for pouring soda with less foam.
Light as Air When we say that something is as light as air, what does that really mean?
Making Craters Make your own craters, and compare them with photos of the real thing.
Erosion From the beaches of Florida to the mountains of California, learn how wind, water, ice and gravity can erode big rocks into smal
Water Cycle Have you ever really thought about the water cycle, about how old that glass of water really is, and all the places it has been?
Continuous Change Just as we change as we age, the Earth changes too, wearing away in some places and building back up in others.
Fast and Slow Change From earthquakes that last seconds to continental drift that takes millions of years, the Earth changes in many ways.
Recycle With Americans producing 600,000 tons of garbage a day, it is important to look at what we throw away.
Wonderful Water Because it is so common, we forget how chemically bizarre water is.
Hydrothermal Quartz How can hot water form such beautiful quartz crystals? It takes a lot of pressure!
Mystery of the Glassy Tube How quickly can you figure it out?
Mystery of the Golden Needles Another Cabinet of Curiosities mystery.
Rocks An introduction to rocks and the rock cycle.
Identifying Minerals Using simple tests such as luster, hardness, and cleavage/fracture, you can identify most common minerals.
What is a Mineral? Forget "animal, vegetable, or mineral?" The scientific definiton of a mineral is much more specific.
75% Water 75% of the Earth’s surface is water., but that only scratches the surface, as Robert dives into this deep subject.
Bernoulli Effect A simple challenge that does not work the way you would expect.
Written Experiments
A Homemade Barometer
Rock Stacking
Egg Geodes Grow crystals in an egg shell.
Panning for Iron
Saving Water
Eclipse Watching
A Compass at the South Pole
Fault Blocks
Sand Castles
Drawing Life Sized Dinosaurs
Richter Scale
How Much Rain?
Pinecone Weather
Is That Really a Diamond?
Science Photos
Science Photo of the Day #863The cliffs behind our house were once part of an erg. Without looking it up, what is an erg?
Science Photo of the Day #861This is a grain of salt, photographed with my new microscope. Why are grains of salt cube-shaped?
Science Photo of the Day #851Energy does not just appear out of nowhere, so the potential energy of the lake water had to come from some other energy source.
Science Photo of the Day #850I photographed this oil refinery in New Mexico. How do they make gasoline from crude oil?
Science Photo of the Day #849Nancy and I recently visited one of the many slot canyons found in Utah. How do these deep, narrow canyons form?
Science Photo of the Day #832I found these interesting marks in a tire track in our driveway. What produced them?
Science Photo of the Day #822This is a photo of some frost crystals that were on our car windows yesterday morning. This morning there was no frost on the w
Science Photo of the Day #819Is snow a rock, a mineral, both, or neither?
Science Photo of the Day #818When frost forms on your window, why do the crystals often form in lines?
Science Photo of the Day #816I noticed that as things warm up, the snow often melts first around the base of plants. Why?
Science Photo of the Day #814Today it snowed pretty much continuously, even though it was 40°F outside. How can it snow if the temperature is above freezing
Science Photo of the Day #810The ice that formed in our bird bath, buckets, etc. is white, but icicles are usually clear. What is the difference?
Science Photo of the Day #808We had a very nice snow today, our first since we moved to the canyon. Does it ever get too cold to snow?
Science Photo of the Day #803Since moving to Utah, we have seen quite a few of these strangely shaped, round clouds. What are they, and how do they form?
Science Photo of the Day #802The rocks around our new home have these strange structures of lines tilted at different angles. What caused that?
Science Photo of the Day #795How is the formation of frost different from most other kinds of ice?
Science Photo of the Day #788Why do the contrails left by airplanes sometimes vanish quickly, and sometimes last for a long time?
Science Photo of the Day #787This interesting plant is very common in our area. We have been collecting seeds to plant around our new home, and we found out
Science Photo of the Day #776Most people have seen clouds that let spotlights of sunlight shine through. Although it is a familiar sight, most people don't
Science Photo of the Day #759This is a piece of fossil turtle bone. Alligators, some turtles and some fish have bones with ridges like this. What function
Science Photo of the Day #753What is the difference between weathering and erosion?
Science Photo of the Day #749The dunes at the beach shift depending on which way the wind is blowing. Which way was it blowing when this dune formed?
Science Photo of the Day #740I love to look out the window on plane trips. If you have ever done that, you may have seen bands of dark and light vegetation
Science Photo of the Day #735These needle shaped ice crystals were sticking up out of the ground. How did they form?
Science Photo of the Day #734Why are trees an important part of the water cycle?
Science Photo of the Day #733We can use wind energy to produce electricity, but where does the wind get its energy?
Science Photo of the Day #730While we are talking about pine trees, why would these be useful for someone studying meteorology?
Science Photo of the Day #724This one was taken at Shark Valley, in Everglades National Park. The area is flat as a pancake, and more than thirty miles from
Science Photo of the Day #720How often do you eat beach sand from St. Augustine, FL?
Science Photo of the Day #719While many parts of Death Valley are below sea level, there are places where the ground is exactly at sea level. If you compared
Science Photo of the Day #16How about some geology? What geologic process caused this strange rock formation?
A New Fossil Site in Alabama

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