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Recursos > Beth Touchette

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Fruit Fly Lab: Phototaxis, Geotaxis and Chemotaxis

Did you know that the flies that buzz around your fruit bowl in the summer time have made huge contributions to science? A lot of what we’ve learned about genetics and chromosomes was first discovered ...

Break a Ruler Using Newspaper and Atmospheric Pressure

In those rare moments when we actually think about the air around us, we typically think of the oxygen that allows us to breathe. But did you know that oxygen makes up only 21% of the Earth’s atmosphe ...

How to Measure Viscosity of Liquids

The frozen waffle you put in the toaster just popped out, but your maple syrup is still in the fridge. You squeeze the syrup container, but it takes forever to flow out of the bottle! Why?This sticky ...

What Causes the Phases of the Moon?

It’s fascinating to watch how the moon changes over a month.For a couple days, it is a full bright circle. Then, it begins to shrink, until only a tiny crescent remains.Then, it disappears all togethe ...

How to Make Gears

Gears are the toothed wheels used in many machines, including bicycles, where they work together to change the relationship between the driving mechanism and the moving parts. You pedal the cranks to ...

Specific Heat of Water vs. Specific Heat of Sand

Your feet may already know what specific heat is: Your toes felt nice and cool in the ocean on a summer day. Then, you decided to walk barefoot to the ice cream stand. The sand was much warmer than th ...

Water Purification Experiment: Removing Chlorine From Water

Chlorine is a chemical added to water supplies to kill microorganisms. Microorganisms are tiny living things like bacteria, viruses, and protozoans that cannot be seen with the naked eye.Cholera, typh ...

Total Alkalinity and pH of Personal Care Products

Every day we use personal care products like shampoos, soaps, and lotions. We trust that these substances will clean and beautify us without giving us rashes. The scientists who design shampoos and fa ...

How to Make a Hygrometer: Sling Psychrometer

First of all, what is a hygrometer and why would you want to make one?A hygrometer is a tool used by meteorologists(scientists who study the weather) to measure how much moisture is in the air.You mig ...

Examples of Mechanical Weathering

It’s hard to believe, but the tiny grains of sand you see at the beach were once part of giant boulders. Over many years, these huge rocks were broken down into smaller pieces in a process called weat ...

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