Ch. 2
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Which of the following does NOT contain plasma? A. Ice B. The sun C. A neon sign D. Outer space
A. Ice
Which of the following is a chemical property? A. Hardness B. Texture C. Ease of rusting D. Color
C. Ease of rusting
Which of the following is the main characteristic of a plasma? A. Low speed particles B. Rare in the universe C. Few collisions D. Charged particles (ions)
D. Charged particles (ions)
What are some examples of physical properties?
Color, luster, malleability, brittleness, odor, taste, density, texture, hardness, electrical conductivity, heat conductivity, boiling point, melting point, freezing point…
Which of the following do gases and plasmas have? A. Definite shape B. High density C. Low speed particles D. High compressibility
D. High compressibility
Which of these is seeing dew on the ground an example of? A. Sublimating B. Condensing C. Melting D. Freezing
B. Condensing
Which of the following is not a physical property? A. Density B. Flammability C. Freezing point D. Magnetism
B. Flammability
Which of the following provides evidence for the Kinetic-Molecular model? A. Most metals are shiny. B. Silver tarnishes when exposed to oxygen. C. Perfume fills a room with scent. D. A piece of paper can be torn into smaller and smaller pieces.
C. Perfume fills a room with scent. This is diffusion.
True or False: Only solids have a definite shape.
True
True or False: Anytime you bake something and you can smell it, it is a chemical change.
True
True or False: Condensation happens when gas particles lose energy.
True
True or False: Some things can exist in more than one state of matter (solid, liquid, gas).
True
True or False: Physical properties of substances can be used to identify them.
True
True or False: The freezing point for all material is 0 degrees C.
False
True or False: Solids need to melt, then boil or evaporate before they can become gases.
False. Sublimation is when a solid turns into a gas without first going into a liquid state.
True or False: A phase change alters the chemical composition of the substance.
False. The chemical composition stays the same.
True or False: Changes in thermal energy (heat) are the primary reason for phase changes in substances.
True
What is the difference in the spacing of particles between solids, liquids, and gases?
Solids- atoms are always touching, and move very slowly. Liquids- atoms are always touching, but move faster. Gases- atoms are not touching, and move even faster.
Sublimation
The phase change directly from solid to gas, bypassing the liquid state.
State or phase
A physical form of matter determined by the arrangement of energy and its particles.
Condensation
The phase change from gas to liquid.
Evaporation
The escape of a fast liquid particle from the surface of a liquid.
Melting
The phase change from solid to liquid.
Boiling
Rapid vaporization of a liquid caused by vapor pressure exceeding atmospheric pressure.