Water Molecule Structure Question Preview (ID: 48667)
Structure And Phase Changes.
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Ice floats on liquid water. Which explanation is most correct?
a) Ice is less dense than water due to the tightly packed water molecules in ice crystals.
b) Ice is more dense than water due to the large space between water molecules in ice crystals.
c) Ice is less dense than water due to the large space between water molecules in ice crystals.
d)
Which state of water has molecules with the most movement?
a) gas
b) solid
c) liquid
d)
Which state of water has molecules with the least movement?
a) solid
b) gas
c) liquid
d)
Which of the following statements best describes a polar molecule?
a) the uneven sharing of electrons that creates a slightly positive and negative side.
b) the even sharing of electrons
c) has an overall positive charge
d) has an overall negative charge
Which statement best describes the structure of a water molecule?
a) Oxygen end is slightly negative, while Hydrogen end is slightly positive
b) Oxygen end is slightly positive, while Hydrogen end is slightly negative
c) Both Oxygen and Hydrogen have negative charges
d) Both Oxygen and Hydrogen have positive charges
What is water's freezing point?
a) 80 degrees Fahrenheit
b) 100 degrees Celsius
c) 0 degrees Celsius
d) 20 degrees Celsius
True or False: Water covers about 70% of Earth's surface.
a) true
b) false
c)
d)
What is water's boiling point?
a) 32 degrees Fahrenheit
b) 100 degrees Celsius
c) 0 degrees Celsius
d) 20 degrees Celsius
The elements of a water molecule are held together by which type of bond?
a) double bond bond
b) hydrogen bond
c) covalent bond
d) ionic bond
Why is water called a polar molecule?
a) hydrogen donates an electron to oxygen
b) there is an unequal sharing of electrons in the molecule
c) oxygen donates an electron to hydrogen
d) the molecule is cold
Which two elements make up a water molecule?
a) protons and neutrons
b) Hydrogen and electrons
c) Oxygen and Nitrogren
d) Oxygen and Hydrogen
Water is able to dissolve many substances, and is commonly known as the
a) universal solute
b) universal solvent
c) universal compound
d) universal element
The only substance on Earth that commonly exists in all three different states is
a) salt
b) oil
c) water
d) sugar
When water is exposed to the sun, evaporation occurs, turning liquid water into a
a) gas
b) solid
c) liquid
d)
At which temperatures could water potentially be found in a LIQUID state?
a) -15° C
b) 22° C
c) 112° C
d) 125° C
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