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Learn: States of Matter
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Welcome!Today we'll explore states of matter and how particles behave in solids, liquids, and gases. Let’s dive in!
What are the states of matter?There are three main states of matter: solid, liquid, and gas. Each has a unique arrangement, movement, and energy level of particles. Understanding these differences helps us explain changes like melting or boiling.
SolidsIn solids, particles are tightly packed in a regular arrangement. They vibrate but do not move freely. Solids have a fixed shape and volume.
LiquidsIn liquids, particles are close together but can move freely past each other. Liquids take the shape of their container but have a fixed volume.
GasesIn gases, particles are far apart and move quickly in all directions. Gases take the shape and volume of their container.
Quick check: Which statement about solids is correct?
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Changes of StateWhen matter changes state (e.g., melting or boiling), the arrangement, movement, and energy of particles change. For example, heating a solid increases particle energy, causing it to melt into a liquid.
Which of the following are examples of changes of state? (Select all that apply)
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DiffusionDiffusion is the movement of particles from an area of higher concentration to lower concentration. It’s faster in gases because particles move freely and are far apart.
Diffusion occurs when particles move from {{blank0}} concentration to {{blank1}} concentration.
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SolubilitySolubility is the maximum amount of a substance that can dissolve in a solvent at a specific temperature. It’s measured in grams per 100 grams of solvent.
Match the items on the left with their correct pairs on the right
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Review Time!Great work! You've learned about states of matter, diffusion, and solubility. Now let’s test your understanding with a few final questions.
What happens to particle movement when a solid melts into a liquid?
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Which statements are true about gases? (Select all that apply)
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Match the items on the left with their correct pairs on the right
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Particles in solids have a {{blank0}} arrangement and {{blank1}} movement.
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