Life and Science
Biologists categorize all living things based on related characteristics into these 6 large groups.
What are Kingdoms?
This is the smallest particle a substance can be divided into and still retain the properties of an element.
What is an atom?
This subatomic particle has insignificant mass.
What is an electron?
Due to hydrogen bonding, ice is how dense compared to water?
A) More dense
B) Less dense
C) The same density
B) Less dense
An acid is __________.
A) a material that resists changes in the pH of a solution
B) Any compound with a pH
C) A compound increases the H+ concentration of a solution
D) A compound that decreases the H+ concentration of a solution
C) A compound increases the H+ concentration of a solution
All the organisms on your campus make up this level of classification.
What is a community?
This is the maximum number of electrons that the lowest energy level may contain:
A) 2
B) 4
C) 6
D) 8
E) 10
A) 2
These four elements are the most abundant ones in living systems.
What are Oxygen, Nitrogen, Carbon and Hydrogen?
Water is a very versatile solvent because water molecules are __________.
A) Hydrophobic
B) Ionic
C) Nonpolar
D) Polar
D) Polar
Which is the most acidic?
A) a solution with pH 1
B) a solution with pH 4
C) a solution with pH 7
D) a solution with pH 14
A) a solution with pH 1
In an ecosystem, nutrients __________ and energy __________.
A) are recycled ... flows through
B) are created ... is lost
C) flow through ... is recycled
D) are wasted ... is burned
A) are recycled ... flows through
This type of bond describes when the electrons are shared equally between two atoms.
What is a covalent bond?
How many electrons would be present in the valence shell of a silicon atom (atomic number 14, mass number 28)?
A) 1 electron
B) 2 electrons
C) 4 electrons
D) 6 electrons
C) 4 electrons
This term refers to when water sticks to another substance (eg. water droplets sticking to a spider web).
What is adhesion?
Which solution would have the greatest number of Hydroxide ions?
A) a solution with pH 1
B) a solution with pH 3
C) a solution with pH 8
D) a solution with pH 12
D) a solution with pH 12
Which of the following domains is prokaryotic?
A) Archaea
B) Fungi
C) Eukarya
D) Protists
A) Archaea
Compared with Phosphorous-31, the radioactive isotope, Phosphorous-32 has:
A) a different atomic number.
B) a different charge.
C) one more proton.
D) one more electron.
E) one more neutron.
E) one more neutron.
The reactivity of an atom arises from:
A) the potential energy of the valence shell.
B) the sum of the potential energies of all the electron shells.
C) the existence of unpaired electrons in the valence shell.
D) the average distance of the outermost electron shell from the nucleus.
C) the existence of unpaired electrons in the valence shell.
Hydrogen bonding in water is caused by:
A) excessive hydrogen dissolved in water
B) the electronegativity caused by covalent bonds within water molecules
C) available electrons that are shared
D) electrons that are donated by one atom and received by the other
B) the electronegativity caused by covalent bonds within water molecules
This substance helps minimize changes in the H+ and OH- levels in a solution by either accepting or donating H+ when necessary.
What is a buffer?
Which of the following is a correct hierarchy of decreasing complexity?
A) organ system, tissue, molecule, cell
B) nervous system, brain, nervous tissue, nerve cell
C) organism, organ system, tissue, cell, organ
D) organ system, nervous tissue, brain
B) nervous system, brain, nervous tissue, nerve cell
Which statement is true of all atoms that are anions?
A) The net charge is 1-.
B) The atom has more protons than electrons.
C) The atom has more neutrons than protons.
D) The atom has fewer protons than does a neutral atom of the same element.
E) The atom has more electrons than protons.
E) The atom has more electrons than protons.
Which of the following represents the isotope Oxygen-18? (Hint: Oxygen's atomic number is 8)
A) 6 protons, 8 neutrons, 6 electrons
B) 9 protons, 9 neutrons, 9 electrons
C) 10 protons, 8 neutrons, 9 electrons
D) 8 protons, 10 neutrons, 8 electrons
D) 8 protons, 10 neutrons, 8 electrons
Water has __________ than some other liquids and metals. This is why when you heat an iron pot of water on the stove, the pot will get hot before the water does.
A) Lower heat of vaporization
B) A higher specific heat
C) A lower capacity for forming hydrogen bonds
D) A lower specific heat
B) A higher specific heat
Adding a base to a solution tends to_____.
A) increase the H+ concentration and raise the pH
B) decrease the H+ concentration and raise the pH
C) increase the H+ concentration and lower the pH
D) decrease the H+ concentration and lower the pH
B) decrease the H+ concentration and raise the pH