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PURE SUBTANCES AND MIXTURES

PURE SUBTANCES AND MIXTURES. ●HETEROGENOUS MIXTURES ●HOMOGENEOUS MIXTURES. PURE SUBSTANCES AND MIXTURES. Some substances are pure and others are mixtures. Pure substances have got only one component, but mixtures contain two or more components. PURE SUBTANCES.

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PURE SUBTANCES AND MIXTURES

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  1. PURE SUBTANCES AND MIXTURES ●HETEROGENOUS MIXTURES ●HOMOGENEOUS MIXTURES

  2. PURE SUBSTANCES AND MIXTURES Some substances are pure and others are mixtures. Pure substances have got only one component, but mixtures contain two or more components.

  3. PURE SUBTANCES A puresubtanceconsists of onlyone component.It has got specific properties that we can describe gold water oxigen We can identifythembyspecificpropertiessuch as densityortheboilingpoint.

  4. MIXTURE Is a combination of two or more components.The properties depend on its components and how they are combined. Most things around us are mixtures of different substances.

  5. EXAMPLES OF MIXTURES. GRANITE. SEA WATER. AIR

  6. GRANITE Granite is a mixture of different minerals. Granite's a very hard stone. It's hard because it formed as hot liquid stone, and so the molecules inside it are all jumbled , instead of lying in layers as in sedimentary rocks like limestone or slate.

  7. SEA WATER • Sea water is a mixture of water,salt,magnesium and other substances. Water is made up of two elements, hydrogen and oxygen. Its chemical formula is H2O. • Each molecule of water is made up of two hydrogen atoms • The existence of water is essential for life on Earth. • Water has three different states, liquid, solid and gas. • Water covers around 70% of the Earth’s surface.

  8. Photo of sea water

  9. AIR Air is a mixture o nitrogen,oxygen,carbon dioxide and other gases.Water covers the Earth in a layer over 400 miles high. This layer is called the atmosphere. It contains 78% nitrogen, 21% oxygen, and smaller amounts of hydrogen, carbon dioxide, and others.

  10. Heterogenous mixtures We can see the separate components of a heterogeneous mixture. We can easily see the individual pieces of fruit in a salad.

  11. Homogenous mixtures • We can´t see the components separately. • A juice is a type of homogeneous mixture.

  12. QUESTIONS What is a mixture? A mixture is a combination of two or more components. What is a pure subtance? A pure subtance is only one component that we can describe. Say two examples of mixtures. For example tea or juice. Say two examples of pures subtances. For example gold and water.

  13. games • Game pure subtances and mixtures • Quiz of pure subtasnces and mixtures • Quiz of mixtures

  14. videos Pure subtances mixtures

  15. BY SOFIA GALLARDO MURO signature:SCIENCE Class:5ºAsignature:SCIENCE Class:5ºA

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