Physical Science Chapter 15 Quiz
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Physical Science Chapter 15 Quiz

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Questions and Answers

What is a substance?

  • Either an element or compound (correct)
  • Only a compound
  • Only an element
  • A rich mixture

    • When all the atoms in a substance are alike, the substance is an _______.

    element

    A _____ is a substance with two or more elements combined in a fixed proportion.

    compound

    Two or more substances that can be easily separated by physical means form a _____ .

    <p>mixture</p> Signup and view all the answers

    What defines a heterogeneous mixture?

    <p>A mixture of different and easily distinguishable materials.</p> Signup and view all the answers

    What is a homogeneous mixture also known as?

    <p>Solution</p> Signup and view all the answers

    What are colloids?

    <p>Heterogeneous mixtures with larger particles that never settle.</p> Signup and view all the answers

    A heterogeneous mixture containing a liquid in which visible particles settle is called a _______.

    <p>suspension</p> Signup and view all the answers

    What is a physical property?

    <p>Characteristics of a material which can be observed without changing the identity of the substances.</p> Signup and view all the answers

    What does 'appearance' describe?

    <p>Physical description of a substance.</p> Signup and view all the answers

    What does 'behavior' refer to in substances?

    <p>How a substance acts.</p> Signup and view all the answers

    Physical properties such as size and magnetism can be used to _____ mixtures.

    <p>separate</p> Signup and view all the answers

    What is a physical change?

    <p>Change in a substance's size, shape or state of matter.</p> Signup and view all the answers

    Substance does not change ______ when it undergoes a physical change.

    <p>identity</p> Signup and view all the answers

    _______ is a process for separating a mixture by evaporating a liquid and condensing its vapor.

    <p>Distillation</p> Signup and view all the answers

    What indicates a chemical property of a substance?

    <p>Characteristics indicating potential chemical change.</p> Signup and view all the answers

    When one substance changes to another substance, a _______ has occurred.

    <p>chemical change</p> Signup and view all the answers

    Some chemical changes are indicated by ______ change, smell, or bubble formation.

    <p>temperature</p> Signup and view all the answers

    Other chemical changes occur very slowly, such as the formation of _____.

    <p>rust</p> Signup and view all the answers

    Chemical changes can be used to _______ substances such as metal from their ores.

    <p>separate</p> Signup and view all the answers

    ______ of earth's surface involves both physical and chemical changes.

    <p>Weathering</p> Signup and view all the answers

    What is physical weathering?

    <p>Big rock split into smaller ones, streams carry rock particles.</p> Signup and view all the answers

    What is chemical weathering?

    <p>Chemical changes occurring in rock due to environmental factors.</p> Signup and view all the answers

    What does the law of conservation of mass state?

    <p>Mass of substances before and after a chemical change remains constant.</p> Signup and view all the answers

    All substances are built from ______.

    <p>atoms</p> Signup and view all the answers

    A beam of light can be seen as it passes through a ______.

    <p>colloid</p> Signup and view all the answers

    A _____ is a homogeneous mixture of particles so small they cannot be seen and will not settle.

    <p>solution</p> Signup and view all the answers

    A beam of light is ______ as it passes through a solution but _____ be seen as it passes through a colloid.

    <p>invisible, can</p> Signup and view all the answers

    What properties are considered physical?

    <p>Appearance and behavior.</p> Signup and view all the answers

    What is a chemical change?

    <p>The change of one substance to another.</p> Signup and view all the answers

    When substances go through a physical or chemical change, mass is always _____ .

    <p>conserved</p> Signup and view all the answers

    Smoke is a _____ mixture and a ______.

    <p>heterogeneous, colloid</p> Signup and view all the answers

    What does the fragrance of a flower represent?

    <p>Physical property.</p> Signup and view all the answers

    Distillation is a process that can separate two liquids using _____.

    <p>physical changes</p> Signup and view all the answers

    What is the odor of a substance considered?

    <p>A physical property.</p> Signup and view all the answers

    What are colloids?

    <p>Mixtures.</p> Signup and view all the answers

    The freezing of water is a _____ change.

    <p>physical</p> Signup and view all the answers

    Homogeneous mixtures can be separated by physical changes.

    <p>False</p> Signup and view all the answers

    Colloids and ______ scatter light.

    <p>suspensions</p> Signup and view all the answers

    Color is a _____ property.

    <p>physical</p> Signup and view all the answers

    When a firecracker explodes, mass is ______.

    <p>not lost</p> Signup and view all the answers

    A suspension is a _______ mixture.

    <p>heterogeneous</p> Signup and view all the answers

    A burnt object has undergone a ______ change.

    <p>chemical</p> Signup and view all the answers

    Study Notes

    Classification of Matter

    • Matter is classified into substances (elements and compounds) and mixtures.

    Substance

    • A substance is defined as either an element (uniform atoms) or a compound (two or more elements in a fixed ratio).

    Mixture

    • Mixtures consist of two or more substances that can be separated by physical means.

    Types of Mixtures

    • Heterogeneous mixtures contain distinguishable materials.
    • Homogeneous mixtures, also known as solutions, have components that are evenly blended.

    Properties of Mixtures

    • Colloids have larger particles that do not settle, demonstrating the Tyndall effect by scattering light.
    • Suspensions contain visible particles that settle out over time.

    Physical Properties

    • Characteristics observable without altering the substance, including color, shape, size, melting point, and boiling point.

    Changes in Matter

    • Physical changes alter size, shape, or state but do not change the identity of the substance.
    • Examples of physical changes include freezing or distillation.

    Chemical Properties

    • Indicate a substance's potential for chemical change, such as flammability or reactivity to light.

    Chemical Changes

    • Occur when substances transform into different substances, often evidenced by changes in temperature, smell, or bubbling.

    Weathering

    • The weathering process of Earth's surface involves both physical changes (like rock fragmentation) and chemical changes (like acid rain reactions).

    Conservation of Mass

    • According to the law of conservation of mass, total mass remains constant before and after a chemical change.

    Particles of Matter

    • All substances are composed of atoms, the fundamental building blocks.

    Solutions

    • Solutions are homogeneous mixtures where the particles are too small to be seen and do not settle.

    Behavior of Light in Mixtures

    • A beam of light is visible in a colloid but not in a solution.

    Characteristics of Mixtures

    • Colloids and suspensions both scatter light.
    • Smoke exemplifies a heterogeneous mixture that is also classified as a colloid.

    Mass and Changes

    • Mass is conserved during physical and chemical changes, meaning it is not lost, as evidenced in events like an exploding firecracker.

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    Description

    Test your knowledge on the classification of matter with this quiz based on Physical Science Chapter 15. Explore definitions and concepts related to substances, elements, compounds, and mixtures through engaging flashcards.

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