Gr 8 Natural Sciences Ch 2.2: Solids, liquids and gases

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Questions and Answers

What is the primary difference between the arrangement of particles in a solid and a liquid?

  • Particles are stationary in a liquid.
  • Particles are farther apart in a solid.
  • Particles are in a fixed arrangement in a solid. (correct)
  • Particles are more densely packed in a liquid.

Which of the following best describes the movement of particles in a solid?

  • They collide with each other frequently.
  • They are stationary and do not move.
  • They move freely in any direction.
  • They vibrate in their fixed positions. (correct)

What is the primary reason for the incompressibility of solids?

  • The particles are too large to be compressed.
  • The particles are too close together to be compressed.
  • The particles are in a fixed arrangement and are held together by strong forces of attraction. (correct)
  • The particles are not moving at all.

Which of the following properties is characteristic of a liquid?

<p>Ability to flow (B)</p> Signup and view all the answers

What is the result of the strong forces of attraction between particles in a solid?

<p>The particles are held together in a fixed arrangement. (A)</p> Signup and view all the answers

What is meant by the term 'compress' in the context of particle models?

<p>To press or squeeze together, reducing volume (C)</p> Signup and view all the answers

Which of the following best describes the arrangement of particles in a solid?

<p>Closely packed in a regular, fixed arrangement (A)</p> Signup and view all the answers

What is the primary difference between the movement of particles in a solid and a liquid?

<p>Particles in a solid vibrate in their fixed positions, while particles in a liquid move around each other. (C)</p> Signup and view all the answers

What is the main reason why particles in gases are able to move freely?

<p>Weak forces of attraction between particles (B)</p> Signup and view all the answers

What is the main difference between the arrangement of particles in liquids and gases?

<p>Particles in liquids are closely packed, while particles in gases are far apart (A)</p> Signup and view all the answers

What is the primary factor that affects the rate of diffusion?

<p>The mass of the particles (C)</p> Signup and view all the answers

What is the result of the random movement of particles in liquids and gases?

<p>Particles spread out and mix (D)</p> Signup and view all the answers

What is diffusion?

<p>The movement of particles from an area of high concentration to an area of low concentration (A)</p> Signup and view all the answers

Why do gases expand to fill their container?

<p>Because particles are far apart and move randomly (A)</p> Signup and view all the answers

What is the main difference between the zigzag path of particles in liquids and gases?

<p>Particles in liquids travel in a zigzag path with many collisions, while particles in gases travel in a straighter path with fewer collisions (D)</p> Signup and view all the answers

What happens to the particles in a gas when the temperature is increased?

<p>Particles speed up and move farther apart (C)</p> Signup and view all the answers

What is the main reason why particles in orange juice are able to flow and take the shape of their container?

<p>Weak forces of attraction between particles allow them to move and slide past each other (D)</p> Signup and view all the answers

What is the difference in the arrangement of particles between a liquid and a gas?

<p>Particles in liquids are closely packed, while particles in gases are far apart (B)</p> Signup and view all the answers

What happens to the particles in a gas when the temperature is decreased?

<p>Their movement becomes less random and slower (B)</p> Signup and view all the answers

Why do lighter particles diffuse faster than heavier particles?

<p>Because they are smaller and have less mass (C)</p> Signup and view all the answers

What is the primary factor that affects the rate of diffusion in gases?

<p>The temperature of the gas (A)</p> Signup and view all the answers

What is the result of the random movement of particles in a gas?

<p>The particles spread out and mix evenly (C)</p> Signup and view all the answers

What is the primary reason why diffusion occurs more quickly in gases than in liquids?

<p>Because particles in gases are farther apart (C)</p> Signup and view all the answers

What is the main difference between the zigzag path of particles in liquids and gases?

<p>The path is straighter in gases (D)</p> Signup and view all the answers

What is the main reason why particles in a solid are not able to flow?

<p>The particles are vibrating in their fixed positions and are held in place by strong forces of attraction. (D)</p> Signup and view all the answers

Which of the following describes the movement of particles in a liquid?

<p>Particles are moving around each other, allowing liquids to flow. (A)</p> Signup and view all the answers

What is the main reason why liquids are slightly compressible?

<p>Particles are close together but not in a fixed arrangement. (D)</p> Signup and view all the answers

Which of the following describes the arrangement of particles in a solid?

<p>Particles are arranged in a regular, repeating pattern. (D)</p> Signup and view all the answers

What is the main difference between the movement of particles in a solid and a liquid?

<p>Particles in a solid vibrate in place, while particles in a liquid move around each other. (C)</p> Signup and view all the answers

What is the result of the strong forces of attraction between particles in a liquid?

<p>Particles are close together but not in a fixed arrangement. (C)</p> Signup and view all the answers

Which of the following describes the arrangement of particles in a solid?

<p>Particles are arranged in a regular, repeating pattern. (C)</p> Signup and view all the answers

What is the reason why a solid retains its shape and does not flow?

<p>The particles are arranged in a regular, repeating pattern and are held in place by strong forces of attraction. (B)</p> Signup and view all the answers

What is the primary reason for the fixed shape of solids?

<p>Strong forces of attraction between particles (D)</p> Signup and view all the answers

What happens to the particles in a liquid when it flows?

<p>They move around each other (B)</p> Signup and view all the answers

What is the primary reason why particles in a gas are able to move freely and independently?

<p>Weak forces of attraction between particles (A)</p> Signup and view all the answers

What is the primary characteristic of the arrangement of particles in a solid?

<p>Regular and fixed (B)</p> Signup and view all the answers

Why do particles in a solid vibrate in their fixed positions?

<p>Due to strong forces of attraction (A)</p> Signup and view all the answers

Which of the following statements about diffusion is true?

<p>Diffusion is the random movement of particles from an area of high concentration to an area of low concentration (B)</p> Signup and view all the answers

What is the primary reason for the slight compressibility of liquids?

<p>Particles are close together but not fixed (C)</p> Signup and view all the answers

Why do particles in a liquid diffuse slower than particles in a gas?

<p>Particles in a liquid are closer together, causing more frequent collisions (D)</p> Signup and view all the answers

What is the result of the close packing of particles in a solid?

<p>Incompressibility (C)</p> Signup and view all the answers

What is the primary factor that affects the rate of diffusion in gases?

<p>Temperature (C)</p> Signup and view all the answers

Which of the following is a characteristic of the arrangement of particles in a gas?

<p>Particles are far apart (A)</p> Signup and view all the answers

Why do sodium and chloride atoms alternate in a fixed arrangement in table salt?

<p>Due to strong forces of attraction (D)</p> Signup and view all the answers

What is the primary difference between the movement of particles in a solid and a liquid?

<p>Particles vibrate in solids, but move freely in liquids (D)</p> Signup and view all the answers

Why do particles in orange juice flow and take the shape of their container?

<p>Weak forces of attraction between particles (D)</p> Signup and view all the answers

What is the result of the random movement of particles in liquids and gases?

<p>Particles spread out and mix (A)</p> Signup and view all the answers

Why do gases expand to fill their container?

<p>Weak forces of attraction between particles allow them to move freely (B)</p> Signup and view all the answers

What is the primary reason why particles in a gas are able to fill their container?

<p>Weak forces of attraction between particles allow them to move independently. (D)</p> Signup and view all the answers

What is the primary factor that affects the rate of diffusion in liquids?

<p>Space between particles, as larger spaces slow down diffusion. (D)</p> Signup and view all the answers

What is the result of the random movement of particles in a gas?

<p>Particles mix and spread out, filling available space. (D)</p> Signup and view all the answers

Why do particles in orange juice flow and take the shape of their container?

<p>Due to weak forces of attraction between particles. (B)</p> Signup and view all the answers

What is the primary difference between the arrangement of particles in a liquid and a gas?

<p>Particles in liquids are closer together than those in gases. (D)</p> Signup and view all the answers

What is the primary characteristic of the movement of particles in a gas?

<p>Particles move very fast and freely. (C)</p> Signup and view all the answers

What is the result of the compression of a gas?

<p>Particles become closer together, decreasing the space between them. (B)</p> Signup and view all the answers

Why do particles in a gas diffuse faster than particles in a liquid?

<p>Due to their faster movement and greater space between particles, allowing easier diffusion. (B)</p> Signup and view all the answers

What is the primary factor that determines the movement of particles in a solid?

<p>The forces of attraction between particles (B)</p> Signup and view all the answers

What is the result of the close packing of particles in a liquid?

<p>Liquids are able to flow (C)</p> Signup and view all the answers

What is the primary reason why particles in a gas are not in a fixed arrangement?

<p>The forces of attraction between particles are weak (D)</p> Signup and view all the answers

What is the result of the constant motion of particles in a liquid?

<p>Liquids are able to diffuse (C)</p> Signup and view all the answers

What is the primary characteristic of the arrangement of particles in a solid?

<p>Particles are in a regular, fixed arrangement (C)</p> Signup and view all the answers

What is the result of the slight compressibility of liquids?

<p>Liquids are able to be compressed significantly (C)</p> Signup and view all the answers

What is the primary reason why particles in a solid do not flow?

<p>The forces of attraction between particles are strong (D)</p> Signup and view all the answers

What is the result of the vibration of particles in a solid?

<p>Solids retain their fixed shape (A)</p> Signup and view all the answers

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