How Would You Define an X-ray Source?
A source of X-rays is something that emits X-rays. In space, astronomers search for X-ray sources. Radiation emitted by objects in space can take many different forms....
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How Will You Define Radiation?
Radiation is rays of particles or waves, traveling from a source from one place to another at the speed of light. Radiation is energy that has an electric field and a...
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How Will You Define a Quark?
Quark is thought to be a subatomic particle. Atoms are made up of particles called neutrons and protons together called hadrons, along with lighter electrons. In turn,...
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How Do Kangaroos Hop?
The large, stretchy tendons in a kangaroo’s hind legs act like giant springs. As these tendons strain and contract, they generate most of the energy needed for each...
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What Is the Importance of Dietary Fats?
Fats are type of nutrient, and just like protein and carbohydrates they are an important part of the food we eat. They give us energy and enable us to produce heat to...
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