Melting and Boiling
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Questions and Answers

Which of the following statements about physical changes is correct?

  • Physical changes only involve changes in state or shape. (correct)
  • Physical changes alter the properties of matter.
  • Physical changes can only occur at extremely high temperatures.
  • Physical changes involve the creation of a new type of matter.

What happens to the temperature of water when it starts boiling?

  • The temperature becomes negative.
  • The temperature remains the same.
  • The temperature increases. (correct)
  • The temperature decreases.

Which of the following is an example of a physical change?

  • Cooking an egg
  • Burning wood
  • Rusting iron
  • Melting ice (correct)

What is the difference between water and ice?

<p>Water and ice have different states. (C)</p> Signup and view all the answers

Which of the following is not a characteristic of physical changes?

<p>Creation of new matter (D)</p> Signup and view all the answers

What is a physical change?

<p>A physical change is a change in the state or shape of matter, where no new type of matter is created and the properties remain the same.</p> Signup and view all the answers

Explain the physical change that occurs when water boils.

<p>When water boils, it undergoes a physical change from a liquid to a gas.</p> Signup and view all the answers

What is the difference between a physical change and a chemical change?

<p>A physical change only alters the state or shape of matter, while a chemical change results in the formation of new substances with different properties.</p> Signup and view all the answers

Give an example of a physical change.

<p>An example of a physical change is the melting of ice to form water.</p> Signup and view all the answers

Is the rusting of iron a physical change or a chemical change?

<p>The rusting of iron is a chemical change.</p> Signup and view all the answers

Study Notes

Physical Changes

  • Ice and water are different states of the same matter; ice is solid while water is liquid.
  • Heating water increases its temperature, leading to boiling at a specific temperature.
  • Boiling is a physical change, transforming water from a liquid to a gas without creating new matter.
  • In physical changes, only the state or shape of matter changes, and properties remain unchanged.

Chemical Changes

  • Rusting of iron is an example of a chemical change, where iron reacts with oxygen and moisture to form rust.
  • Unlike physical changes, chemical changes result in the formation of new substances with different properties.

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Description

Test your knowledge on physical changes, specifically melting and boiling. Learn about the different states of matter and how they can change with temperature. Explore the process of melting ice into water and the point at which water boils.

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