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15
×
Which of the following is NOT a type of chemical bond?
Ionic bond
Polar covalent bond
Covalent bond
Polar ionic bond
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15
×
Proteins are biological molecules made of _____.
glycerol
amino acids
nucleotides
sugars
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seesaw
Swap points!
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gift
Win 5 points!
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fairy
Take points!
5
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25
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thief
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25
15
×
What is the maximum number of electrons that can occupy the 2s orbital?
3
2
8
6
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15
×
A hydrogen bond is _____.
an intermolecular force
a paramolecular force
an intramolecular force
a perimolecular force
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15
×
Why is solid water (ice) less dense than liquid water?
It is actually more dense.
Hydrogen bonds are not able to be formed.
Liquid water does not form hydrogen bonds.
The hydrogen bonds between water molecules are spaced out.
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15
×
Why does soap remove grease from pans when we wash dishes?
Soap molecules react with fats to break up fat blobs.
Part of the soap is polar and part is non-polar
The whole soap molecule is non-polar, so it breaks apart fat
Soap sends a chemical message to fats to break up fat blobs
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lifesaver
Give 25 points!
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fairy
Take points!
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25
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shark
Other team loses 15 points!
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lifesaver
Give 15 points!
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eraser
Reset score!
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rocket
Go to first place!
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fairy
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15
20
25
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lifesaver
Give 25 points!
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15
×
Which of the following statements is true?
Valence electrons are in the outermost shell
Electrons removed from atoms always increase the stability
Electrons circle the nucleus like Earth around the Sun
The energy of electrons decreases with increasing distance
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15
×
Water's ability to move against gravity in a narrow space, such as a tube, is called:
Hydrogen bonding.
Cohesion.
Capillary action.
Osmosis.
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15
×
A polar molecule, such as the one involved in a hydrogen bond, is sometimes called _____.
a covalent bond
simply, hydrogen
a tripole
a dipole
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15
×
Carlos just finished an exhausting workout. Which of the following carbohydrates can be readily used by his body as a source of fuel?
Cellulose
Glucose
Dietary fiber
Any kind of polysaccharide.
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15
×
A redox reaction can easily be explained as:
forming a bond by sharing electrons
an attraction between opposite charges
transferring electrons between reactants
the breakdown of glucose in cells
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15
×
Which of the following roles do lipids NOT play in our bodies?
Generate heat
Store energy
Make up part of our cell membranes
Act as hormones
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15
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All of the following statements are true, EXCEPT _____.
mammals store carbohydrates in the form of glycogen
pasta and cereals are good sources of carbohydrates
starch is composed of amylopectin and amylose
sugars are found only in plants
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