MOTION AND FORCE – PHYSICAL SCIENCE
Motion You probably already know that speed describes how fast something is moving. An object’s speed can be calculated using […]
Learn more →GED Math/Science/Social Studies/RLA – PREP
Motion You probably already know that speed describes how fast something is moving. An object’s speed can be calculated using […]
Learn more →Turning on a lightbulb and running a mile both require energy, but not the same kind of energy. Energy is […]
Learn more →Structures of Matter Atomic Particles; All atoms are made up of three basic subatomic particles: protons, neutrons, and electrons. Another […]
Learn more →Body Systems The human body is made up of organ systems that work together to carry out all the functions […]
Learn more →Energy in Ecosystems Energy moves continuously through ecosystems, powering life at every level. In most ecosystems, energy flows through four […]
Learn more →Evolutionary Relationships Common Ancestry; Lions, tigers, and cheetahs are all large cats, but they are different species. Even though these […]
Learn more →DNA and Chromosomes A cell uses the instructions in its deoxyribonucleic acid (DNA) to make substances called proteins. Proteins are […]
Learn more →Introduction Just as a lightbulb needs electricity and a car needs gasoline, cells need a source of energy to function. […]
Learn more →CELLS, TISSUES, AND ORGANS All living things—from the smallest bacteria to the largest animals—are made up of cells. Cells are […]
Learn more →In his 1940 press conference, President Roosevelt presents a compelling case for why the United States should support Great Britain […]
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