Chemistry Of Life Warm Up 3
Welcome to the Electronic Learning Environment for Life Science (biology). The roles of biology and chemistry are becoming very evident of the relationship between the two fields. Chemical reactions of all living things take place in the aqueous environment of the cell. Water has several unique properties that make it one of the most important compounds found in living organisms. This warm up allows you an unlimited number of attempts to increase your test-taking and learning skills in advanced biology. As a bonus, each attempt randomly generates new questions and answers.
- 1.All water is distributed equally on Earth.
- A.
True
- B.
False
- 2.The three states of matter are water, food, and gas
- A.
True
- B.
False
- 3.What percentage of earth's water is usable by humans ?
- A.
1 %
- B.
99 %
- C.
15 %
- 4.Ionic bonds always form between metals and ___________.
- A.
Nonmetals
- B.
Metals
- C.
Metalloids
- 5.An _______ bond forms when a cation transfers its extra electron to an anion who needs it.
- A.
Metallic
- B.
Covalent
- C.
Ionic
- 6.Negatively charged ions, called ____________, result from gain of electrons.
- A.
Cations
- B.
Anions
- 7.Positively charged ions, called ____________, result from loss of electrons.
- A.
Cations
- B.
Anions
- 8.The process of removing or adding electrons is called __________.
- A.
Work
- B.
Ionization
- C.
Electrification
- 9.When an electron is added to or removed from an atom, the atom becomes a(n) ________.
- A.
Ion
- B.
Bond
- C.
Nothing; it stays an atom
- 10.One molecule of water contains....
- A.
One atom of hydrogen and one atom of oxygen
- B.
Two atoms of hydrogen and one atom of oxygen
- C.
Two atoms of hydrogen and two atoms of oxygen
- D.
One atom of hydrogen and two atoms of iron
- E.
Two atoms of hydrogen and three atoms of oxygen
- 11.Because charges are unevenly distributed across the water molecule. Water is a called a nonpolar compound.
- A.
True
- B.
False
- 12._____ _____ prevents organisms that live on land from overheating. (NOTE: Please observe grammar rules.)
- 13.Water molecules stick to each other as a result of _____ _____. (NOTE: Please enter your answers in lower case letters.)
- 14.An attractive force that holds molecules of a single substance together is known as _____.
- A.
Bonding
- B.
Capillarity
- C.
Adhesion
- D.
Cohesion
- E.
Density
- 15.An attractive force between two particles of different substances, such as water molecules and glass molecules is called a(n)_____.
- A.
Bonding
- B.
Capillarity
- C.
Adhesion
- D.
Cohesion
- E.
Density
- 16.An attraction between molecules that results in the rise of the surface of a liquid when in contact with a solid is called a(n)_____.
- A.
Bonding
- B.
Capillarity
- C.
Adhesion
- D.
Cohesion
- E.
Density
- 17.A _____ is a mixture in which one of more substances are uniformly distributed in another substance. For example, plasma, the liquid portion of blood.
- A.
Solution
- B.
Solute
- C.
Solvent
- D.
Concentration
- E.
Saturated solution
- F.
Aqueous solutions
- 18.A _____ is a substance dissolved in the solvent.
- A.
Solution
- B.
Solute
- C.
Solvent
- D.
Concentration
- E.
Saturated solution
- F.
Aqueous solutions
- 19.The _____ of a solution is the amount of solute dissolved into a fix amount of the solution. 10% Calcium chloride solution has 10 g of salt dissolved into enough water to make 100 mL of solution.
- A.
Solution
- B.
Solute
- C.
Solvent
- D.
Concentration
- E.
Saturated solution
- F.
Aqueous solutions
- 20._____ _____ in which water is the solvent and universally important to living organisms.
- A.
Solution
- B.
Solute
- C.
Solvent
- D.
Concentration
- E.
Saturated solution
- F.
Aqueous solutions
- 21.
What is the name of this ion ? (NOTE: Please enter your answers in lower case letters.) - 22.
The ion is known as the _____ ion.
- 23.Hydronium Ions are to Acids: Bases are to _____
- A.
Alkaline
- B.
PH Scale
- C.
Buffers
- D.
Acidic
- 24.What is the pH of blood? (NOTE: Please provide a number from 0 to 14 for your answer.)
- 25.
Vinegar has _____ times the ions at pH 3 than does urine at pH 6.
- A.
10
- B.
100
- C.
1,000
- D.
10,000
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