WGU C165 Competency study guide Exam test questions with approved Answers 2024/2025
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WGU C165
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WGU C165
WGU C165 Competency study guide Exam test questions with approved Answers 2024/2025
evaporation - correct answer thermal energy is absorbed from the surrounding water
condensation - correct answer the energy of the water decreases
melting - correct answer thermal energy is absorbed from th...
WGU C165 Competency study guide Exam
test questions with approved Answers
2024/2025
evaporation - correct answer thermal energy is absorbed from the surrounding water
condensation - correct answer the energy of the water decreases
melting - correct answer thermal energy is absorbed from the surroundings
frezzing - correct answer thermal energy is released to the surroundings
Chemical - correct answer any substance that has a fixed composition of atoms
hydrogen - correct answer chemical composed of water
carbon atoms - correct answer diamond and coal
matter - correct answer anything that takes up space and has mass
atom - correct answer Basic unit of matter
Protons and neutrons reside where - correct answer in the nucleus (center) of the
atom
Electrons reside where - correct answer outside of their nucleus and have a negative
electrical charge
Protons have what type of electrical charge - correct answer positive
,Neutrons have what type of charge? - correct answer electrically netural
valence electrons - correct answer electrons that occupy the outermost regions, those
farthest from the nucleus
Compound - correct answer a chemical that contains at least two different upes of
atoms in a fixed ratio
chemcial bond - correct answer The force that holds atoms together
molecule - correct answer contains an exact number of atoms held together by
chemical bonds
element - correct answer a chemical that contains only one type of atom
organic compoud - correct answer a compound that contains carbon and hydrogen
may contain other elements including oxygen(O), Sulfur(S) and Nitrogen(N)
pure substance - correct answer a substance containing a single element or
compound
mixture - correct answer a combination of two or more pure substances in which each
pure substance retains its individual chemical properties
heterogeneous mixture - correct answer when the components are not evenly mixed
homogeneous mixture - correct answer components are evenly mixed and cannot be
differentiated with the unaided eye
, solid - correct answer particles have relatively little energy and tend to vibrate about a
fixed position, particles are attracted to on another and pack as close together as
possible, can not be compressed into a small volume, has a fixed shape and a fixed
volume
liquid - correct answer more energy then a solid, energy allows the particles to
overcome the attractive forces that hold them together, able to slide past one another,
cannot be compressed. does not have a fixed shape but has a fixed volume
gas - correct answer particles have a lot of energy and move very quickly, enough
energy to overcome attractive forces that hold them together, particles are spread far
apart, can be compressed, does not have a fixed shape and does not ahve a fixed
volume
what is true about a neutron and a proton - correct answer they each have about the
same mass
why are liquids able to pour - correct answer because particles of matter slide past one
another
Nonmetals are located where on the periodic table? - correct answer right side
on the periodic table the atomic number equals what - correct answer the atomic
number equals the number of protons
atoms that have the same number of protons but different numbers of neutrons -
correct answer are the same element
The fuel in a lighter is butane. When butane burns, the following change takes place.
2C4H10 + 13O2 → 8CO2 + 10H2O
Is this a chemical change or a physical change? - correct answer chemical change
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