What are examples of cross cutting relationships? Microscopic cross-cutting relationships are those that require study by magnification or other close scrutiny. For example, penetration of a fossil shell by the drilling action of a boring organism is an example of such a relationship. What causes cross-cutting relationships? Sedimentologic cross-cutting relationships occur where currents have eroded […]
Why can you hear around corners?
Why can you hear around corners? Sound waves that we can hear have much longer wavelengths than do light waves. As a result, the diffraction of sound waves around a corner is noticeable and we can hear the sound in the “shadow region,” but the diffraction of light waves around a corner is not noticeable. […]
What was the most important finding from SN1987A?
What was the most important finding from SN1987A? After the progenitor star Sk-69 202 exploded, astronomers measured the time it took for the energy to travel from the star to the primary ring that is around the star. From this, we can determined the actual radius of the ring from the star. A line from […]
What can trace fossils tell us?
What can trace fossils tell us? Trace fossils provide palaeontologists with evidence of the activities of ancient animals – something body fossils simply can’t do. Trace fossils are formed in place and can therefore tell us about the ancient environment in which the animal lived. Why is fossil evidence so rare? Fossils are rare because […]
Why does a little car have less inertia than a big truck?
What is the common problem with the endocrine system?
What is the common problem with the endocrine system? Stress, infection and changes in your blood’s fluid and electrolyte balance can also influence hormone levels. In the United States, the most common endocrine disease is diabetes. There are many others. They are usually treated by controlling how much hormone your body makes. Does vitamin D […]
How do I stop getting static?
How do I stop getting static? More videos on YouTube Buy a Humidifier. Here’s why humidity matters. Treat Your Carpets. Use an anti-static treatment on your carpets and rugs. Rub Dryer Sheets Over Your Upholstery. Stay Moisturized. Wear Low-Static Fabrics & Shoes. Add Baking Soda to Your Laundry. Can static electricity hurt your heart? During […]
When did the Copernican Revolution start?
When did the Copernican Revolution start? 1543 Who discovered revolution of Earth? Nicolaus Copernicus When did Darwinian revolution occur? 1859 Why Darwinian revolution is important? Charles Darwin is centrally important in the development of scientific and humanist ideas because he first made people aware of their place in the evolutionary process when the most powerful […]
How do you calculate sample mean?
How do you calculate sample mean? How to calculate the sample mean Add up the sample items. Divide sum by the number of samples. The result is the mean. Use the mean to find the variance. Use the variance to find the standard deviation. What is Cochran’s formula? The Cochran formula allows you to calculate […]
What are properties of muscles?
What are properties of muscles? All muscle cells share several properties: contractility, excitability, extensibility, and elasticity: Contractility is the ability of muscle cells to forcefully shorten. What types of muscles? In the body, there are three types of muscle: skeletal (striated), smooth, and cardiac. Skeletal Muscle. Skeletal muscle, attached to bones, is responsible for skeletal […]