What is Chemistry?

Hi, my name is Emerald Robinson, and in this “What Is Video,” we’re going to try to answer the question, “What isChemistry?” Chemistry is the science of matter – both its properties and how it reacts with other matter. Chemistry is a physical science, which means it focuses on things that are not living. Instead, […]

What is a Geologic Fold?

Hi, I’m Emerald Robinson, and in this “What is” video, we’re going to talk about geology as we try to answer the question, “What is a fold?” A fold is a rock formation that’s been made by flat rocks becoming deformed due to stress and pressure. Folds are created when two plates that make up the earth’s crust […]

What is an Ice Age?

Hi, I’m Emerald Robinson. In this “What Is” video we’re going to take a closer look at ice ages. In 1840, Swiss scientist Louis Agassiz noticed glaciers–huge rivers of ice created by snowfall–occurred throughout northern Europe. As glaciers move they transport rocks and scour the ground beneath them, leaving evidence of their passing. Agassiz theorized glaciers […]

What is a Sonic Boom?

Hi, I’m Emerald Robinson, and in this “What Is” video, we’re going to answer the question, “What is a Sonic Boom?” A sonic boom is the noise produced by something moving through the air faster than the speed of sound. But how is a sonic boom produced? As an object moves through air, it forces air […]

What is Bacteria?

Hi, I’m Emerald Robinson, and in this “What Is” video, we’re going to take a look at one of nature’s smallest yet most influential organisms: bacteria. Bacteria, sometimes called “prokaryotes,” are microscopic single-celled organisms that lack a nucleus and other membrane-bound organelles. Most bacteria have the same major parts: a protective cell wall, a cell membrane, […]