WGU C165 UNIT 5: EARTH & SKY QUESTIONS WITH CORRECT ANSWERS

Newton's Law of Universal Gravitation CORRECT ANSWER The law that says every object in the universe attracts every other object, and that the force is affected by mass and distance: the greater the mass of an object, the greater the attraction; the farther apart the objects, the weaker the attraction. Nebula CORRECT ANSWER a cloud of gas and dust in space Nuclear Fusion CORRECT ANSWER The process by which two or more small nuclei fuse to make a bigger nucleus Star CORRECT ANSWER A ball of hot gas, primarily hydrogen and helium, that undergoes nuclear fusion. Galaxy CORRECT ANSWER a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction. Milky Way Galaxy CORRECT ANSWER the galaxy containing our solar system Orbit CORRECT ANSWER The path of an object as it revolves around another object in space Solar System CORRECT ANSWER sun, planets, and all the other objects that revolve around the sun Planets CORRECT ANSWER a celestial body moving in an elliptical orbit around a star. Asteroids CORRECT ANSWER a small rocky body orbiting the sun Inner Planets CORRECT ANSWER the planets closest to the Sun