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Biology Intro, Chemistry & Water! Flashcards | StudBud
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Biology Intro, Chemistry & Water!
Biology Intro, Chemistry & Water!
15 terms
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StudBud Administration
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A Quiz quiz to review basics of Biology, Chemistry and the properties of Water to college students.
Flashcards
15 cards
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Practice quiz
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Questions
15
Answers
1
Which of the following is a hydrophobic material?
sugar
wax
paper
table salt
2
We can be sure that a mole of table sugar and a mole of vitamin C are equal in their
mass in grams
mass in daltons
volume
number of molecules
3
The element aluminum has 13 protons and mass number of 27. Which of the statements are TRUE?
Aluminum has an atomic number of 13 and 14 neutrons
Aluminum has the same number of protons as neutrons
Aluminum has an atomic number of 27 and 14 neutrons
Aluminum is an inert element
4
Ice can float in liquid water because the water molecules in ice are ________________________ .
a different molecule than liquid water molecules
spread much further apart -- therefore less dense than water
held by the surface tension of the water
packed very tightly together and therefore denser than water
5
What coefficients must be placed in the following blanks? C
6
H
12
O
6
→ _____ C
2
H
6
O + _____ CO
2
3; 1
1; 1
1; 2
2; 2
6
Which of the following statements is TRUE about buffers?
They accept H+ in aqueous solutions.
Statements a through c are true.
They prevent large pH changes.
They donate H+ in aqueous solutions.
7
The reactivity of an atom arises from
the potential energy of the valence shell
the existence of unpaired electrons in the valence shell
the energy difference between the s and p orbitals
the sum of the potential energies of all the electron shells
8
A solution contains 0.000000001 (10
-9
) moles of hydroxyl ions [OH-] per liter. The solution is:
acidic: H+ donor
neutral
basic: H+ acceptor
acidic: H+ acceptor
9
____________ of water molecules at the air-water interface gives water high surface tension.
adhesion
cohesion
evaporation
specific heat
10
Compared with
31
P, the radioactive isotope
32
P has
one more electron
a different atomic number
one more neutron
one more proton
11
Which of the following elements is NOT one of the 4 most common elements in living organisms?
oxygen
carbon
phosphorus
nitrogen
12
The abundance of _______________ is the main reason the Earth is habitable.
water
nitrogen
plant life
rocks
13
The changes in finch beak morphology can best be attributed to this
mechanism
of evolution
unnatural selection
random drift
fitness
natural selection
14
All the organisms on your campus make up ________________.
a taxonomic domain
an ecosystem
a population
a community
15
Which of the following is an example of
qualitative
data?
The contents of the stomach are mixed every 20 seconds
The temperature decreased from 20°C to 15°C
The plant's height is 25 centimeters (cm)
The fish swam in a zigzag motion
