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A solution is a mixture were all the ingredients or particles are evenly mixed together. This is a picture of a solution of food coloring in water. All the particles from the food coloring have been evenly mixed together with the water particles forming a solution.(Right)

Although most people would just look at this picture and only think of a ship there is more to it. Like the fact that it needs buoyancy to float on the water. Although it may be big it does not sink. Yet a nail far lighter does sink. How can this be? Well all the mass in the nail is not spread out, it is in one area, so it sinks. A boat however floats because it has its mass spread instead of all compacted into one area.(left) When most people think of Orbiting they think of the planets orbiting the sun. But there are many other things that orbit each other in the universe. Did you ever think of the sattelites that orbit earth?

Matter is anything that takes up space and has mass. The harmonica shown above is matter because it has mass and takes up space, so you know it is matter.

Gravity is a force that attracts objects to Earth. You can tell there is gravity in this picture because the label attached to the key ring is pointing downward. If there was no gravity the label would be floating in an upward direction.