Dropper
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Droppers are used to place drops of liquid into other containers or solutions. They allow for precise amounts of a liquid, often water, to be delivered drop by drop for experiments, medicines, or other uses requiring small amounts of a substance. Droppers provide a simple tool for accurately dispensing and measuring out liquids a drop at a time.
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The document describes the water cycle through 3 main steps: 1) Evaporation where water is heated by the sun and turns to vapor, 2) Condensation where the vapor rises and cools to form water drops in clouds, and 3) Precipitation where the heavy clouds release water in forms of rain, hail, snow or sleet that falls back to oceans, seas, rivers, and ground in a continuous cycle controlled by solar heating.
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The butterfly goes through distinct life cycle stages of egg, caterpillar, pupa, and adult butterfly. The egg hatches into a caterpillar that eats leaves to grow large, then forms a hard shell called a pupa where it transforms into an adult butterfly, which emerges from the pupa fully formed to complete the cycle.
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Habitats are changing and some animals cannot adapt, putting them at risk of becoming endangered when only a few remain or extinct when their entire kind has died off. Scientists learn about past animals and plants like dinosaurs by finding fossils in different locations around the world, as fossils provide information about ancient lifeforms and their historic habitats.
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