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15 Cards in this Set

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In the term trace elements, the modifier trace means-


A- the element is required in very small amounts


B- the element can be used as a label to trace atoms through and organism's metabolism


C- the element is very rare on earth


D- the element enhances health but is not essential for the organism's long-term survival


E- the element passes rapidly through an organism

A- the element is required in very small amounts

Trace

Which of these is a synonymous pair of terms?


A- hydrogen ion - hydroxide ion


B- hydrogen ion - proton


C- hydroxide ion - hydronium ion


D- water - hydronium


E- hydrogen - htdronium ion

E- hydrogen - hydronium ion

An element is to a(an) ________ as a tissue is to a(an) __________.


A- atom; organism


B- compound; organ


C- molecule; cell


D- atom; organ


E- compound; organelle

B- compound; organ

What is the main thesis of Lawrence Henderson's The Fitness of the Environment?


A- Earth's environment is constant


B- It is the physical environment, not life, that has evolved.


C- The environment of Earth has adapeted to life


D- Life as we know it depends on certain environmental qualities on Earth


E- Water and other aspects of Earth's environment exist because they make the planet more suitable for life.

D- Life as we know it depends on certain environmental qualities on Earth

As a reuslt of photosynthesis, plants release _______ into the atomosphere.


A- methane


B- carbon dioxide


C- sugar


D- minerals


E- oxygen

E- oxygen

In a water molecule, hydrogen and oxygen are held together by a(an) ___________ bond.


A- double covalent


B- ionic


C- nonpolar covalent


D- hydrogen


E- polar covalent

E- polar covalent

For two bodies of matter in contact, heat always flows from-


A- the body with greater heat to the one with less heat


B- the body if higher heat temperature to the one of lower temperature


C- the denser body to the less dense body


D- the body with more water to the one with less water


E- the larger body to the smaller body

A- the body with greater heat to the one with less heat

Results from a transfer of electron(s) between atoms

Ionic bond

Results from unequal sharing of electrons between atoms

Polar covalent bond

Explains most specifically the attraction of water molecules to one another

Hydrogen bond

An uncharged atom of boron has an atomic number of 5 and an atomic mass of 11. How many electrons does boron have?


A- 11


B- 15


C- 0


D- 5


E- 2

D- 5

What is the atomic mass of an atoms that has 6 protons, 6 neutrons, and 6 electrons?


A- 6


B- 8


C- +1


D- 12


E- 18

D- 12

A measure of the average kinetic energy of the molecules in a body of matter

Temperature

Average kinetic energy

The number of grams of a substance that equals its molecular mass in daltons

Mole

A weak acid or base that combines reversibly with hydrogen ions

Buffer