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Anatomy & Physiology: Basic Chemistry and Matter Concepts

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Termini in questo insieme (31)

  • What is the definition of Chemistry?

    Chemistry is the study of matter and the changes it undergoes.

  • What is Matter?

    Matter is anything that occupies space and has mass.

  • What are the main classifications of Matter?

    Pure substances, mixtures, elements, compounds, molecules, and atoms.

  • What are the two types of mixtures?

    Homogeneous and heterogeneous mixtures.

  • How many elements occur naturally on Earth?

    98 elements occur naturally on Earth.

  • How many elements have been created by scientists?

    20 elements have been created by scientists.

  • What is a compound?

    A compound is a pure substance composed of atoms of two or more different elements chemically united in fixed proportions.

  • What is a molecule?

    A molecule is a substance composed of two or more atoms chemically united in fixed proportions.

  • Difference between compound and molecule?

    A compound contains atoms of different elements; a molecule can be atoms of the same or different elements.

  • Difference between physical and chemical changes?

    Physical changes do not change composition; chemical changes alter the composition of matter.

  • What are the three main states of matter?

    Solids, liquids, and gases.

  • Characteristics of solids?

    Solids have a fixed shape and are not easy to compress.

  • Characteristics of liquids?

    Liquids have no defined shape and are not easy to compress.

  • Characteristics of gases?

    Gases have no fixed shape and are invisible and intangible.

  • What is Melting?

    Change of state from solid to liquid.

  • What is Freezing?

    Change of state from liquid to solid.

  • What is Sublimation?

    Change of state from solid directly to gas.

  • What is Deposition?

    Change of state from gas directly to solid.

  • What is Evaporation?

    Change of state from liquid to gas.

  • What is Condensation?

    Change of state from gas to liquid.

  • What does a plateau on a heating/cooling curve represent?

    A plateau indicates a change of state where temperature remains constant.

  • What state is matter below the melting point?

    Solid state.

  • What state is matter above the boiling point?

    Gas state.

  • What state is matter between melting and boiling points?

    Liquid state.

  • What is Density and its formula?

    Density is mass per unit volume, calculated as \(D=\frac{M}{V}\).

  • What is Water Displacement?

    Method to find volume of irregular objects by subtracting initial water volume from final volume.

  • How to find volume using water displacement?

    Volume of object = Final volume - Initial volume (Vobj = Vf - Vi).

  • What happens if an object's density is less than the fluid's density?

    The object will float.

  • What happens if an object's density is greater than the fluid's density?

    The object will sink.

  • What is Specific Gravity?

    Ratio of the density of a substance to the density of pure water.

  • What are the three temperature scales used?

    Kelvin, Celsius, and Fahrenheit.