Quiz about Biology Chemistry of Life Review

Question 1

Atoms are made up of three parts...

Accepted Answer

Electrons, Neutrons and Protons

Answer

Electrons, Lipids and Protons

Answer

Electrons, Nucleus, Protons

Answer

Electrons, Ions, Cheese

Question 2

The four elements of life are...

Accepted Answer

Hydrogen, Oxygen, Nitrogen, Carbon

Answer

Hydrogen, Helium, Nitrogen, Sillicon

Answer

Sodium, Titanium, Oxygen, Carbon

Answer

Neon, Argon, Krypton, Helium

Question 3

pH stands for...?

Accepted Answer

power of Hydrogen

Answer

power of Helium

Answer

power of Monty

Answer

power of Herbert

Question 4

An example of an acid would be

Accepted Answer

Lemon Juice

Answer

Lye

Answer

Water

Answer

Baking Soda

Question 5

Bases taste...

Accepted Answer

Bitter

Answer

Sour

Answer

Like nothing

Answer

Sweet

Question 6

What is a pure substance made of only one type of atom?

Accepted Answer

Element

Answer

Isotope

Answer

Compound

Answer

Molecule

Question 7

What charge do electrons have?

Accepted Answer

negative

Answer

positive

Answer

neutral

Question 8

The atomic number of an elements is the total number of which particles in the nucleus?

Accepted Answer

protons

Answer

neutrons

Answer

electrons

Answer

protons and electrons

Question 9

Subatomic particle that determines the identity of the atom

Accepted Answer

proton

Answer

nucleus

Answer

electron

Answer

neutron

Question 10

The __________________ is the sum of the protons and the neutrons in an atom.

Accepted Answer

Mass Number

Answer

Atomic Number

Answer

Protons

Answer

Neutrons

Question 11

Particles in an atom that are neutral and have no charge are

Accepted Answer

neutrons

Answer

negatrons

Answer

electrons

Answer

protons

Question 12

If the number of protons equal the number of _____, the atom will have no charge

Accepted Answer

electrons

Answer

protons

Answer

neutrons

Answer

nucleus

Question 13

Ions are:

Accepted Answer

atoms with a positive or negative charge

Answer

atoms with no charge

Answer

atoms with ONLY a positive charge

Answer

atoms with ONLY a negative charge

Question 14

What are the building blocks of MATTER?

Accepted Answer

Atoms

Answer

Cells

Answer

Protons

Answer

Neutrons

Question 15

What holds atoms, molecules, and compounds together?

Accepted Answer

Chemical Bonds

Answer

Electromagnetism

Answer

Magnetism

Answer

Electricity

Question 16

A molecule is formed when two or more ____________ chemically join together.

Accepted Answer

Atoms

Answer

Compounds

Answer

Mixtures

Answer

Solutions

Question 17

Ionic, covalent, van der Waals forces

Accepted Answer

hold molecules and atoms together

Answer

are types of atoms

Answer

are compounds

Answer

are of no consequence in life forms

Question 18

Most of the mass of the atom is contained in the nucleus, which subatomic particle is not in the nucleus and is responsible for chemical properties of  atoms?

Accepted Answer

electron

Answer

proton

Answer

neutron

Answer

quark

Question 19

The unequal sharing of electrons in water makes water a polar molecule leading to the formation of

Accepted Answer

hydrogen bonds

Answer

nano bonds

Answer

hydrostatic interactions

Answer

molecular initiatives

Question 20

Covalent Bonds share electrons

Accepted Answer

True

Answer

False

Question 21

Polar molecules are

Accepted Answer

ones where the charge is not shared equally

Answer

cold molecules

Answer

ones where the charge is shared equally

Answer

have the same degree of attraction

Question 22

In chemical compounds, covalent bonds form when

Accepted Answer

pairs of electrons are shared between two atoms.

Answer

the electronegativity difference between two atoms is very large.

Answer

electrons are completely transferred between two atoms.

Answer

ions are held together by opposite charges.

Question 23

What two elements make up water?

Accepted Answer

Hydrogen and oxygen

Answer

Helium and oxygen

Answer

helium and carbon

Answer

oxygen and carbon

Question 24

What word describes when water is attracted to other substances?

Accepted Answer

adhesion

Answer

cohesion

Answer

capillary action

Answer

surface tension

Question 25

Why does ice float?

Accepted Answer

As water freezes, it expands and its density decreases.

Answer

As water freezes, it takes up more hydrogen from the atmosphere, causing it to have a greater buoyancy.

Answer

As water freezes, air becomes trapped between the hydrogen bonds of water molecules.

Answer

As water freezes, it takes up more oxygen from the atmosphere, causing it to have a greater buoyancy.

Question 26

Which end of the water molecule has a slightly positive charge?

Accepted Answer

the hydrogen end

Answer

the oxygen end

Answer

both ends are slightly positive

Answer

neither end is positive

Question 27

Water is a universal solvent because it...

Accepted Answer

Dissolves most substances

Answer

It can be found anywhere

Answer

It freezes when it gets cold

Answer

floats when frozen

Question 28

Which of the following is LEAST likely to dissolve in water?

Accepted Answer

nonpolar fats and oils

Answer

polar sugar molecules

Answer

salt made of a positive sodium ion and a negative chloride ion

Answer

all of the substances will dissolve easily in water

Question 29

Large bodies of water, such as lakes and oceans, do not quickly fluctuate in temperature. What is the reason for this phenomenon?

Accepted Answer

Water has a high heat capacity.

Answer

Water is an acid.

Answer

Water is a versatile solvent.

Answer

Water acts as a buffer.

Question 30

Small insects can walk across the surface of calm water. Their feet push the surface of the water down slightly, somewhat like a person walking across a trampoline, but they do not break the surface. What is the best explanation for why this happens?

Accepted Answer

The insects are light enough so that they do not break the hydrogen bonds holding the water molecules together

Answer

The insects actually use their wings to hover slightly above the water's surface and they only skim it with their feet

Answer

The insects' feet are non-polar, so they are repelled by the polar water molecules and are pushed away from the water's surface

Answer

The insects are small enough to see the individual water molecules, so they are able to step carefully from one molecule to the next

Question 31

What is the only substance with a neutral pH of 7?

Accepted Answer

Water

Answer

Milk

Answer

Orange Juice

Answer

Blood

Question 32

A(n) _______ is a substance with a pH greater than 7.

Accepted Answer

Base

Answer

Acid

Answer

Buffer

Answer

Water

Question 33

Molecules that stick to the same type of molecules.

Accepted Answer

cohesion

Answer

adhesion

Answer

hydrophilic

Answer

hydrophobic

Question 34

A substance with a pH of 6 is called a....

Accepted Answer

Acid

Answer

Base

Question 35

Capillary action is....

Accepted Answer

both adhesion and cohesion

Answer

adhesion

Answer

cohesion

Answer

change in matter (heat of fusion)

Question 36

Which acid listed is the strongest acid?

Accepted Answer

Hydrochloric acid pH 1.0

Answer

Sulfuric acid pH 1.2

Answer

Tomatoes pH 4.2

Answer

Water pH 7.0

Question 37

A change of one unit on the pH scale represents a tenfold increase in the concentration of hydrogen ions.
How much greater acidity is there in tomatoes (4.2) vs rainwater (6.2)?

Accepted Answer

100 times

Answer

2 times

Answer

4 times

Answer

10 times

Question 38

What is a buffer?

Accepted Answer

a weak acid or base

Answer

an acid

Answer

a base

Answer

an emulsifier

Question 39

What property of water is in this picture?

Accepted Answer

capillary action

Answer

high specific heat

Answer

surface tension

Answer

greatest density at 4^oC

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