CAMPBELL ESSENTIAL BIOLOGY 5E SIMON YEH EXAM SCRIPT 2026 UPDATED QUESTIONS WITH DETAILED ANSWERS GRADED A+

CAMPBELL ESSENTIAL BIOLOGY 5E SIMON
YEH EXAM SCRIPT 2026 UPDATED
QUESTIONS WITH DETAILED ANSWERS
GRADED A+

⩥ What are the three states of matter? Answer: Solid, liquid, gas.


⩥ What are elements? Answer: Substances that cannot be broken down
into other substances.


⩥ How many elements are naturally occurring elements? Answer: 92


⩥ What are the 4 most important elements to life? Answer: Carbon,
hydrogen, nitrogen, oxygen.


⩥ What are trace elements Answer: Elements necessary for life in small
amounts.


⩥ Example of trace element Answer: Iodine (thyroid gland), Iron
(Important component of the protein hemoglobin which transports
oxygen).

, ⩥ What are compounds? Answer: Substances that contain two or more
elements.


⩥ What are atoms? Answer: The smallest unit of matter that still retains
the properties of an element.


⩥ What are the 3 main subatomic particles? Answer: Protons, Electrons,
Neutrons.


⩥ What does the atomic number tell you? Answer: The number of
protons in an element.


⩥ How are the chemical properties of an atom determined? Answer: By
the number of electrons in the outermost (valence) shell.


⩥ What are polar molecules? Answer: Molecules with covalent bonds
where the electrons are not shared equally.


⩥ Is water polar or nonpolar? Answer: Polar.


⩥ What are hydrogen bonds Answer: Weak bonds formed between a
Hydrogen and another molecule.