Welcome, Class 9 students! Are you ready to dive into the fascinating world of matter and its purity? This blog is here to help you master the topic Is Matter Around Us Pure? with ease. Flashcards are an excellent tool for quick revision and self-assessment, and in this blog, we’ve created a set of Is Matter Around Us Pure? Class 9 Flashcards to help you grasp key terms and concepts effortlessly. Let’s get started and make learning both fun and effective!
Pure Substance
A substance made up of only one type of particle, with a fixed composition and properties. Examples: elements and compounds.
Mixture
A combination of two or more pure substances mixed in any proportion. Examples: air, seawater.
Homogeneous Mixture
A mixture with a uniform composition throughout. Examples: sugar in water, salt in water.
Heterogeneous Mixture
A mixture with a non-uniform composition. Examples: sand and salt, oil and water.
Solution
A homogeneous mixture of two or more substances. Examples: lemonade, soda water.
Solute
The substance that is dissolved in a solution. Example: sugar in sugar solution.
Solvent
The substance that dissolves the solute. Example: water in sugar solution.
Suspension
A heterogeneous mixture where solid particles are dispersed in a liquid but settle down over time. Example: mud in water.
Colloid
A heterogeneous mixture where particles are too small to settle but large enough to scatter light (Tyndall effect). Example: milk, fog.
Tyndall Effect
The scattering of light by colloidal particles, making the path of light visible.
Physical Change
A change in the physical properties of a substance without altering its chemical composition. Example: melting of ice.
Chemical Change
A change that results in the formation of new substances with different properties. Example: burning of wood.
Element
A pure substance that cannot be broken down into simpler substances by chemical reactions. Example: gold, oxygen.
Compound
A substance formed by the chemical combination of two or more elements in a fixed proportion. Example: water (Hu2082O).
Alloy
A homogeneous mixture of two or more metals or a metal and a non-metal. Example: brass (copper + zinc).v
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Pure Substance
A substance made up of only one type of particle, with a fixed composition and properties. Examples: elements and compounds.
Mixture
A combination of two or more pure substances mixed in any proportion. Examples: air, seawater.
Homogeneous Mixture
A mixture with a uniform composition throughout. Examples: sugar in water, salt in water.
Heterogeneous Mixture
A mixture with a non-uniform composition. Examples: sand and salt, oil and water.
Solution
A homogeneous mixture of two or more substances. Examples: lemonade, soda water.
Solute
The substance that is dissolved in a solution. Example: sugar in sugar solution.
Solvent
The substance that dissolves the solute. Example: water in sugar solution.
Suspension
A heterogeneous mixture where solid particles are dispersed in a liquid but settle down over time. Example: mud in water.
Colloid
A heterogeneous mixture where particles are too small to settle but large enough to scatter light (Tyndall effect). Example: milk, fog.
Tyndall Effect
The scattering of light by colloidal particles, making the path of light visible.
Physical Change
A change in the physical properties of a substance without altering its chemical composition. Example: melting of ice.
Chemical Change
A change that results in the formation of new substances with different properties. Example: burning of wood.
Element
A pure substance that cannot be broken down into simpler substances by chemical reactions. Example: gold, oxygen.
Compound
A substance formed by the chemical combination of two or more elements in a fixed proportion. Example: water (Hu2082O).
Alloy
A homogeneous mixture of two or more metals or a metal and a non-metal. Example: brass (copper + zinc).v
Is Matter Around Us Pure – Key Terms and Concepts
Term/Concept
Definition
Pure Substance
A substance made up of only one type of particle, with a fixed composition and properties. Examples: elements and compounds.
Mixture
A combination of two or more pure substances mixed in any proportion. Examples: air, seawater.
Homogeneous Mixture
A mixture with a uniform composition throughout. Examples: sugar in water, salt in water.
Heterogeneous Mixture
A mixture with a non-uniform composition. Examples: sand and salt, oil and water.
Solution
A homogeneous mixture of two or more substances. Examples: lemonade, soda water.
Solute
The substance that is dissolved in a solution. Example: sugar in sugar solution.
Solvent
The substance that dissolves the solute. Example: water in sugar solution.
Suspension
A heterogeneous mixture where solid particles are dispersed in a liquid but settle down over time. Example: mud in water.
Colloid
A heterogeneous mixture where particles are too small to settle but large enough to scatter light (Tyndall effect). Example: milk, fog.
Tyndall Effect
The scattering of light by colloidal particles, making the path of light visible.
Physical Change
A change in the physical properties of a substance without altering its chemical composition. Example: melting of ice.
Chemical Change
A change that results in the formation of new substances with different properties. Example: burning of wood.
Element
A pure substance that cannot be broken down into simpler substances by chemical reactions. Example: gold, oxygen.
Compound
A substance formed by the chemical combination of two or more elements in a fixed proportion. Example: water (H₂O).
Alloy
A homogeneous mixture of two or more metals or a metal and a non-metal. Example: brass (copper + zinc).
Ready to explore the next chapter? Click here for Chapter 3 Atoms and Molecules flashcards! Go back to revise Chapter 1 Matter in our Surrounding flashcards.
