BIO 141 CHAPTER 1, 2,&3 TEST
Evolution - Correct Answers -A population of organisms changes over time to become
better adapted to a certain environment.
Variable - Correct Answers -A factor that can change in an experiment
Science - Correct Answers -Derived from the Latin verb "to Know." A human endeavor
that uses the scientific method to answer questions&gain knowledge.
Experiment - Correct Answers -the test of a hypothesis
Biology - Correct Answers -The Scientific study of living things and how they evlove
hypothesis - Correct Answers -Educated guess. A possible explanation of some
observation. May have very little evidence to support it.
theory - Correct Answers -Stronger than a hypothesis. it is supported by a considerable
amount of evidence&is widely accepted by the scientific community.
List several characteristics of life - Correct Answers -Cellular organization; Ordered
complexity; sensitivity; Growth, development, and reproduction; energy utilization;
homeostasis; evolutionary adaptation.
Describe the steps in the scientific method - Correct Answers -1st make an observation.
Next is make a question or a problem. The 2nd is making a number of hypotheses. The
3rd generates a Testable hypotheses. 4th is testing the hypotheses (This could be step
1 too). The 5th is the conclusion, the hypothesis can be supported or Disproved, but can
never be proven. Next, tests the remaining hypotheses. Next make the results. Lastly,
after the findings and are able to repeat the results, and then the remaining hypothesis
may become a theory.
The difference b/w using the word Theory by a scientist and the general public uses the
word. - Correct Answers -To a scientist, Theories are the solid ground of science,
expressing ideas of which we are most certain. To the general public, Theory usually
implies the opposite-a lack of knowledge.
the 2 Variable meanings - Correct Answers -1. Factor in an experiment that can be
changed.
2. factor being tested.
, placebo - Correct Answers -A fake drug used in the testing of medication
Matter - Correct Answers -Anything that occupies space&has mass. All matter is made-
up of atoms. Solids, liquids&gases are 3 states of matter.
Element - Correct Answers -Substances that can't be separated into simpler substances
by ordinary chemical means (heat and electricity). There are 90 naturally occurring
elements.
Atom - Correct Answers -The smallest part of an element
atomic number - Correct Answers -the number of protons in the nucleus of an atom.
Valence Electrons - Correct Answers -Electrons in the outer energy level of an atom.
periodic table - Correct Answers -A table of elements invented by Dmitri Mendeleev
(19th-century Russian Chemist). The elements are arranged in order of their atomic
numbers. The chemical properties repeat (periodically) in groups of 8 elements.
Chemical bond - Correct Answers -Ionic bonds, covalent bonds, & hydrogen bonds are
types of chemical bonds. Atoms in a molecule are joined by chemical bonds.
ion - Correct Answers -A charged atom or molecule. Ions do NOT have the same
number of electrons and protons.
Molecule - Correct Answers -a unit formed by 2 or more atoms joined together by
chemical bonds.
electrinegativity - Correct Answers -A measure of the attraction of an atom for electrons
Hydrophilic - Correct Answers -Water loving, attracted water
hydrophobic - Correct Answers -Water fearing, repelled water
Hydroxide ion - Correct Answers -(OH-) a water molecule that has lost one proton. This
ion has a negative charge.
types of Unsaturated : - Correct Answers -1) Monounsaturated: has one double bond
between the carbons in the chain.
2) Polyunsaturated: has two or more double bonds between the carbons in the chain.
Why is unsaturated fats are liquid at room temperature? - Correct Answers -The many
kinks of the double bonds prevent the triglyceride from closely aligning, which makes
them liquid oils at room temperature.
Evolution - Correct Answers -A population of organisms changes over time to become
better adapted to a certain environment.
Variable - Correct Answers -A factor that can change in an experiment
Science - Correct Answers -Derived from the Latin verb "to Know." A human endeavor
that uses the scientific method to answer questions&gain knowledge.
Experiment - Correct Answers -the test of a hypothesis
Biology - Correct Answers -The Scientific study of living things and how they evlove
hypothesis - Correct Answers -Educated guess. A possible explanation of some
observation. May have very little evidence to support it.
theory - Correct Answers -Stronger than a hypothesis. it is supported by a considerable
amount of evidence&is widely accepted by the scientific community.
List several characteristics of life - Correct Answers -Cellular organization; Ordered
complexity; sensitivity; Growth, development, and reproduction; energy utilization;
homeostasis; evolutionary adaptation.
Describe the steps in the scientific method - Correct Answers -1st make an observation.
Next is make a question or a problem. The 2nd is making a number of hypotheses. The
3rd generates a Testable hypotheses. 4th is testing the hypotheses (This could be step
1 too). The 5th is the conclusion, the hypothesis can be supported or Disproved, but can
never be proven. Next, tests the remaining hypotheses. Next make the results. Lastly,
after the findings and are able to repeat the results, and then the remaining hypothesis
may become a theory.
The difference b/w using the word Theory by a scientist and the general public uses the
word. - Correct Answers -To a scientist, Theories are the solid ground of science,
expressing ideas of which we are most certain. To the general public, Theory usually
implies the opposite-a lack of knowledge.
the 2 Variable meanings - Correct Answers -1. Factor in an experiment that can be
changed.
2. factor being tested.
, placebo - Correct Answers -A fake drug used in the testing of medication
Matter - Correct Answers -Anything that occupies space&has mass. All matter is made-
up of atoms. Solids, liquids&gases are 3 states of matter.
Element - Correct Answers -Substances that can't be separated into simpler substances
by ordinary chemical means (heat and electricity). There are 90 naturally occurring
elements.
Atom - Correct Answers -The smallest part of an element
atomic number - Correct Answers -the number of protons in the nucleus of an atom.
Valence Electrons - Correct Answers -Electrons in the outer energy level of an atom.
periodic table - Correct Answers -A table of elements invented by Dmitri Mendeleev
(19th-century Russian Chemist). The elements are arranged in order of their atomic
numbers. The chemical properties repeat (periodically) in groups of 8 elements.
Chemical bond - Correct Answers -Ionic bonds, covalent bonds, & hydrogen bonds are
types of chemical bonds. Atoms in a molecule are joined by chemical bonds.
ion - Correct Answers -A charged atom or molecule. Ions do NOT have the same
number of electrons and protons.
Molecule - Correct Answers -a unit formed by 2 or more atoms joined together by
chemical bonds.
electrinegativity - Correct Answers -A measure of the attraction of an atom for electrons
Hydrophilic - Correct Answers -Water loving, attracted water
hydrophobic - Correct Answers -Water fearing, repelled water
Hydroxide ion - Correct Answers -(OH-) a water molecule that has lost one proton. This
ion has a negative charge.
types of Unsaturated : - Correct Answers -1) Monounsaturated: has one double bond
between the carbons in the chain.
2) Polyunsaturated: has two or more double bonds between the carbons in the chain.
Why is unsaturated fats are liquid at room temperature? - Correct Answers -The many
kinks of the double bonds prevent the triglyceride from closely aligning, which makes
them liquid oils at room temperature.
