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Arya pratheesh

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This document discusses physical and chemical changes of matter. It defines a physical change as a change that alters a substance's appearance, shape, or size but not its chemical identity. Chemical changes create new substances by rearranging particles and bonds. The document provides examples of physical changes like boiling water and cutting paper and chemical changes like burning and rusting. It also describes signs that indicate a chemical reaction has occurred, such as gas production, color change, and temperature change.

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Arya pratheesh
SREEKANDESWARAM POOCHAKKAL B.Ed-2013-2014 KEARALA UNIVERSITY
Submitted by : Arya p m : PHYSICAL SCIENCE :13383007
Submitted to: LINI MOL K S FACULTY IN PHYSICAL SCIENCE DEPARTMENT SNTC POOCHAKKAL
Arya pratheesh
What are physical changes of matter? • A physical change is a change that affects one or more physical properties of a substance. • The appearance, shape, or size of a substance may be altered during a physical change. • Physical changes, such as changes in state(boiling water), dissolving sugar in water, cutting paper, crushing an aluminum can, do not change the chemical identity of a substance. Copyright © Houghton Mifflin Harcourt Publishing Company
Physical Changes of Matter
What are chemical changes of matter? • A chemical change is the process by which one or more substances change into entirely new substances. • Chemical changes are not the same as chemical properties. • Burning is a chemical change; flammability is a chemical property. Copyright © Houghton Mifflin Harcourt Publishing Company
What are chemical changes of matter? • When the particles and chemical bonds that make up a substance are rearranged, a chemical change has taken place. • Chemical changes are often influenced by temperature. At higher temperatures, the particles in a substance have more average kinetic energy or energy of motion. • Higher temperatures often mean faster chemical reactions because the particles that make up a substance move more freely and rearrange more easily. Copyright © Houghton Mifflin Harcourt Publishing Company
How can you tell a chemical change has happened? • There are several signs that a chemical reaction has occurred. • Observing two or more of these signs during a change means you are likely observing a chemical change. Copyright © Houghton Mifflin Harcourt Publishing Company
• Odors can be produced during a chemical change. • Fizzing and foaming may mean gases are being produced. • The production of gas is often evidence of a chemical change. • Boiling also can produce gas bubbles, but boiling is a physical change. Copyright © Houghton Mifflin Harcourt Publishing Company
• A precipitate is a solid that falls out of solution. • The formation of a precipitate can indicate a chemical change. • Energy changes from one form to another can be evidence of a chemical change. • Changes in temperature and color can be signs of a chemical change. Copyright © Houghton Mifflin Harcourt Publishing Company
Chemical Changes of Matter
More examples for physical change
Boiling water
Removing iron filings from a mixture
Broken glass
Salt and water
Cut paper
More examples for chemical changes
Fire work
Rusting nails
Vinegar and Baking soda
Effervescent tablet
Burning wood
Arya pratheesh

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Arya pratheesh

  • 3. Submitted by : Arya p m : PHYSICAL SCIENCE :13383007
  • 4. Submitted to: LINI MOL K S FACULTY IN PHYSICAL SCIENCE DEPARTMENT SNTC POOCHAKKAL
  • 6. What are physical changes of matter? • A physical change is a change that affects one or more physical properties of a substance. • The appearance, shape, or size of a substance may be altered during a physical change. • Physical changes, such as changes in state(boiling water), dissolving sugar in water, cutting paper, crushing an aluminum can, do not change the chemical identity of a substance. Copyright © Houghton Mifflin Harcourt Publishing Company
  • 8. What are chemical changes of matter? • A chemical change is the process by which one or more substances change into entirely new substances. • Chemical changes are not the same as chemical properties. • Burning is a chemical change; flammability is a chemical property. Copyright © Houghton Mifflin Harcourt Publishing Company
  • 9. What are chemical changes of matter? • When the particles and chemical bonds that make up a substance are rearranged, a chemical change has taken place. • Chemical changes are often influenced by temperature. At higher temperatures, the particles in a substance have more average kinetic energy or energy of motion. • Higher temperatures often mean faster chemical reactions because the particles that make up a substance move more freely and rearrange more easily. Copyright © Houghton Mifflin Harcourt Publishing Company
  • 10. How can you tell a chemical change has happened? • There are several signs that a chemical reaction has occurred. • Observing two or more of these signs during a change means you are likely observing a chemical change. Copyright © Houghton Mifflin Harcourt Publishing Company
  • 11. • Odors can be produced during a chemical change. • Fizzing and foaming may mean gases are being produced. • The production of gas is often evidence of a chemical change. • Boiling also can produce gas bubbles, but boiling is a physical change. Copyright © Houghton Mifflin Harcourt Publishing Company
  • 12. • A precipitate is a solid that falls out of solution. • The formation of a precipitate can indicate a chemical change. • Energy changes from one form to another can be evidence of a chemical change. • Changes in temperature and color can be signs of a chemical change. Copyright © Houghton Mifflin Harcourt Publishing Company
  • 14. More examples for physical change
  • 16. Removing iron filings from a mixture
  • 20. More examples for chemical changes