Matter, Particles, and Atoms Quiz
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Questions and Answers

What happens to the spaces between particles of a substance when the substance contracts?

  • The spaces remain the same.
  • The spaces decrease. (correct)
  • The spaces fluctuate.
  • The spaces increase.

How does gas pressure change with temperature?

  • Decreases with temperature.
  • Remains constant with temperature.
  • Fluctuates with temperature.
  • Increases with temperature. (correct)

Which statement best describes atmospheric pressure?

  • Pressure exerted by gas particles in the atmosphere. (correct)
  • Pressure exerted by solid particles in the atmosphere.
  • Pressure exerted by plasma particles in the atmosphere.
  • Pressure exerted by liquid particles in the atmosphere.

What does density of a substance indicate?

<p>Its mass per unit volume. (C)</p> Signup and view all the answers

When an object is denser than its surrounding medium, what happens to the object?

<p>It sinks in the medium. (B)</p> Signup and view all the answers

How does density change with temperature for liquid or gas particles?

<p>Density increases when particles move faster. (B)</p> Signup and view all the answers

What effect does decreasing the volume of a closed container have on gas pressure?

<p>Increases gas pressure. (B)</p> Signup and view all the answers

How does cooling affect the movement of particles in a substance?

<p>Particle movement slows down. (D)</p> Signup and view all the answers

What is the term used to describe the process where solute particles move apart and become evenly distributed among solvent particles?

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

What law states that the total mass of solute and solvent is conserved in dissolving?

<p>Law of Conservation of Mass (D)</p> Signup and view all the answers

In dissolving, what may differ from the sum of the volumes of the solute and solvent?

<p>Volume (D)</p> Signup and view all the answers

What phenomenon is observed when substances expand upon heating and contract upon cooling?

<p>Thermal Expansion and Contraction (A)</p> Signup and view all the answers

What effect does heating have on the movement of particles within a substance?

<p>Causes them to move faster (A)</p> Signup and view all the answers

Which state of matter is characterized by particles being closely packed in a regular pattern and vibrating about a fixed position?

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

What term describes the process where solute particles are evenly distributed among solvent particles?

<p>Diffusion (A)</p> Signup and view all the answers

'Each vibrates about a fixed position' is a characteristic used to define which state of matter?

<p>Solid (A)</p> Signup and view all the answers

What is the basic unit of matter?

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

What does the particle theory state about the particles in matter?

<p>Different substances are made up of different particles. (A)</p> Signup and view all the answers

Which statement accurately describes the movement of particles in gases?

<p>Particles move around easily. (C)</p> Signup and view all the answers

What is the role of molecules in forming matter?

<p>Molecules are formed from atoms. (D)</p> Signup and view all the answers

How does the particle model describe the arrangement of particles in solids?

<p>Particles are closely packed with no regular pattern. (B)</p> Signup and view all the answers

Which characteristic differentiates particles in various substances according to the text?

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

What is the significant difference between atoms and molecules based on the text?

<p>Atoms are the basic unit of matter, while most molecules are formed from two or more atoms. (A)</p> Signup and view all the answers

How do particles in liquids differ from particles in gases based on the text?

<p>Particles in liquids move freely in all directions. (B)</p> Signup and view all the answers

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