CP Bio Test 2 Ch 1,2 Science of Life & Chemistry of Life Test Review

Question Answer
What is a proposed explanation for the way a particular aspect of the natural world functions? hypothesis
What is the responding variable in an experiment? dependent variable
What is an experimentally manipulated variable? independent variable
What is a bond formed by electrical attraction between two oppositely
charged ions?
ionic bond
What is a bond that forms when two atoms share one or more pairs of
electrons?
covalent bond
What is the science of life? biology
What is the series of steps followed to solve problems, including collecting data, formulating a hypothesis, testing the hypothesis, and stating conclusions? scientific method
What is data that is information about qualities; information that can't actually be measured? qualitative data
What is data measured in numbers? quantitative data
What is the stable internal conditions of a living thing? homeostatis
What is the sum of all chemical processes in living things? metabolism
In biology, what is the smallest unit that can perform all life processes? cell
What is the small, dense region consisting of protons and neutrons at the center of an atom? atomic nucleus
What is an atom or molecule with an electrical charge? ion
What are atoms of the same element that have a different number of neutrons? isotope
What is a numeric range that quantifies the relative concentrations of
hydronium ions and hydroxide ions in a solution?
pH scale
What is an electron of an atom, located in the outermost shell of the atom, that can be transferred to or shared with another atom? valence shell electrons
What is a subatomic particle with a positive charge? protons
What is a subatomic particle with no electric charge? neutrons
What is the term to refer to either a proton or a neutron without making a distinction between them? nucleons
polar covalent molecule
What is a substance that cannot be separated or broken down into simpler substances by chemical means? element
What is the electrostatic attraction between two polar groups that occurs when a hydrogen (H) atom covalently bound to a highly electronegative atom? hydrogen bonding
What is the attraction between molecules that results in the rise of a liquid in small tubes? capillarity
high heat capacity
0.9167 g/cm3 at 0 °C density of ice
0.9998 g/cm? at 0 C density of water
What is a substance made up of atoms of two or more different elements joined by chemical bonds? compound
line graph
bar graph
pie chart
Suppose rollie pollies were placed within two petri dishes to test the effects of light and temperature on the bugs. The amount of light and temperature are examples of: factors to which the rollie pollies respond (stimuli)
The experimental group is identical to the control group except for one factor. Is it the independent or dependent variable? Independent variable
Biology is the study of life
T or F: In science, a hypothesis is useful only if it can be tested. True
Which of the following is NOT a goal in science?
A) To use data to support a particular point of view;
B) To explain events in nature;
C)To investigate and understand nature
D) To use derived explanations to make useful predictions
A) To use data to support a particular point of view
T or F: The acronym CHON stands for the four elements making up 96% of your body: carbon, hydrogen, oxygen, and nitrogen. True
Data that uses numbers would be _________________________ data. qualitative
We discussed characteristics of living things, such as "God created all living things according to their kinds." List the five other characteristics of living things. growth, reproduction, homeostasis, metabolism, stimuli
Which process by which organisms keep their internal conditions relatively stable? homeostasis
Hypothesis may arise from:
A) prior knowledge
B) imaginative guesses
C) logical references
D) All of these are correct
D) All of these are correct
What is the chemical symbol for hydrogen? H
What is the chemical symbol for neon? Ne
What is the chemical symbol for aluminum? Al
# of protons in hydrogen? 1
# of protons in neon? 10
# of protons in aluminum? 13
# of neutrons in hydrogen? 0
# of neutrons in neon? 10
# of neutrons in aluminum? 14
# of electrons in hydrogen? 1
# of electrons in neon? 10
# of electrons in aluminum? 13
What is the atomic number of hydrogen? 1
What is the atomic number of neon? 10
What is the atomic number of aluminum? 13
What is the mass number of hydrogen? 1
What is the mass number of neon? 20
What is the mass number of aluminum? 27
The atomic nucleus is made up of _________. protons and neutrons
Isotopes are atoms of the same element with the same number of protons but different number of _____________. neutrons
What type of elements are available to form strong chemical bonds: valence electrons, nucleus electrons, or hydrogen electrons? valence electrons
T or F: The independent variable in an experiment is purposely manipulated to observe a change in the dependent variable. True
Which term does NOT apply to sodium chloride?
A) Crystal
B) Molecule
C) Ionic Bonding
D) Compound
Molecule
Why does ice float on water? Ice floats on water because it is about 9% less dense than water
What is the smallest unit that carrier on all the functions of life? cells
What is the most abundant compound in living things? Water
A substance with a pH of 6 is considered:
A) an acid
B) a base
acid
Suppose the pH of a person's stomach acid was measured in a hospital. Which of the following must be TRUE?
A) pH of stomach acid would be ABOVE 7 on pH scale
B) pH of stomach acid would be BELOW 7 on pH scale
BELOW 7
A substance composed of only one type of atom is called:
A) a nucleus
B) an element
C) a living cell
D) a chemical bond
an element
An atom that has gained or lost electrons is:
A) nucelon
B) molecule
C) ion
D) compound
C) ion
A neutral pH solutions has an equal number of:
A) oxygen and hydrogen ions
B) hydronium and hydroxide ions
C) protons, neutrons, and electrons
D) both A and C are correct
B) hydronium and hydroxide ions
The terms base and alkaline both refer to solutions that:
A) contain more hydronium ions than hydroxide ions
B) contain more hydroxide ions than hydronium ions
B) contain more hydroxide ions than hydronium ions
A solution with a pH of 14 is:
A) neutral
B) basic (also described as alkaline)
C) acidic
D) water
B) basic (also described as alkaline)
T or F: An ionic bond forms when two atoms share one or more pairs of electrons. False
Acids, such as lemon juice, have this characteristic. Which one?
A) Acids have a sour taste
B) Acids are slippery
A) Acids have a sour taste
Atoms become MORE stable when they form compounds b/c:
A) they always loose electrons
B) they always gain electrons
C) their outer shell orbitals become filled
C) their nucleus loses extra protons
C) their outer shell orbitals become filled
What is the universal solvent? water
The strongest kind of bond is a hydrogen bond, ionic bond, or a covalent bond? Covalent bond
A molecule that has a partial positive charge on one side and a partial negative charge on the other side is called a ____ molecule. polar
Which of the following is a characteristic of water resulting from hydrogen bonding?
A) Cohension strength
B) Adhesion strength
C) Capillarity
D) All of these are correct
D) All of these are correct
What are neutral particles in the atomic nucleus? Neutrons
Water molecules are common solvents in cells. Water breaks up other polar substances…
A) such as salts
B) b/c the uneven charge distribution that exists in water molecules
C) thus freeing ions in the substances for use by the body
D) All are correct
D) All are correct
The breaking of _____________ bonds is the first thing that happened when water is heated, which means that is takes a great deal of thermal energy to raise the temperature of water. hydrogen
All organisms possess DNA. DNA:
A) contains information for growth and development
B) creates energy for cells
C) allows sensitivity to environmental growth and development
C) captures energy from the sun
A) contains information for growth and development
Which is true?
A) the change of one pH unit reflects a 10 fold change in a substance's acidity or alkalinity
B) Pure water contains equal numbers of hydronium ions and hydroxide ions
C) Strong acids and bases are very corrosive
D) All are true
D) All are true
Which states of matter contain(s) particles that are tightly linked together in a definite shape? solid
T or F: Everything in the universe is made up of matter. True
T or F: Water's high heat capacity results in movement of water in plants. False
Information gathered from observing a tomato plant growing over 6.0 cm over a four-week period results in:
A) data
B) hypothesis
C) variables
D) Both B and C are correct
data