Biology- Questions With All Correct Answers
Identify each item as either an element or a compound.
carbon (C)
carbon dioxide (CO2)
hydrogen (H)
sodium chloride (NaCl) correct answer -carbon (C) - element
carbon dioxide (CO2) - compound
hydrogen (H) - element
sodium chloride (NaCl) - compound
Which statement describes an element? Check all that apply.
A. An element is a pure substance that cannot be broken down into a simpler
form.
B. An element is made of two or more atoms that are chemically combined.
C. All elements are listed on the periodic table of elements.
D. An element symbol begins with a capital letter; if there is a second or even
third letter, it is a lowercase letter. correct answer -A. An element is a pure
substance that cannot be broken down into a simpler form.
C. All elements are listed on the periodic table of elements.
D. An element symbol begins with a capital letter; if there is a second or even
third letter, it is a lowercase letter.
Explain why there are more substances on Earth than are listed on the
periodic table of elements. correct answer -Elements are pure substances
with only one type of atom. When two or more elements are combined,
compounds are formed. This allows more substances to be created on Earth.
Which of these statements did you include in your answer? Check all that
apply.
A. Elements are pure substances with only one type of atom.
, B. The substances on Earth are created when two or more elements are
combined.
C. Because elements can combine to form compounds, more substances can be
created on Earth. correct answer -A. Elements are pure substances with
only one type of atom.
B. The substances on Earth are created when two or more elements are
combined.
C. Because elements can combine to form compounds, more substances can be
created on Earth.
A scientist is conducting an investigation that involves water, silver, carbon
dioxide, and oxygen gas.Which group of statements best describe all of the
materials he is using in the investigation?
They are each compounds. Each of the compounds is made of atoms. All of the
atoms are made of matter.
They are each made of matter. Some are compounds and some are elements.
They all contain atoms.
They are all elements. Some contain molecules of the same type of atom. Some
contain different types of atoms.
They are each made of matter. Some are compounds made of one type of
element. Some are pure atoms. correct answer -They are each made of
matter. Some are compounds made of one type of element. Some are pure
atoms.
Which statement about enzymes is true?
An enzyme functions to increase the activation energy in a reacton.
Enzymes are proteins that function as catalysts in nonliving things.
Each enzyme can catalyze many different biochemical reactions.
Enzymes and substrates fit together like a lock and key. correct answer -
Enzymes and substrates fit together like a lock and key.
The graph below compares the rates of reaction of a burning candle and an
exploding firework.
Identify each item as either an element or a compound.
carbon (C)
carbon dioxide (CO2)
hydrogen (H)
sodium chloride (NaCl) correct answer -carbon (C) - element
carbon dioxide (CO2) - compound
hydrogen (H) - element
sodium chloride (NaCl) - compound
Which statement describes an element? Check all that apply.
A. An element is a pure substance that cannot be broken down into a simpler
form.
B. An element is made of two or more atoms that are chemically combined.
C. All elements are listed on the periodic table of elements.
D. An element symbol begins with a capital letter; if there is a second or even
third letter, it is a lowercase letter. correct answer -A. An element is a pure
substance that cannot be broken down into a simpler form.
C. All elements are listed on the periodic table of elements.
D. An element symbol begins with a capital letter; if there is a second or even
third letter, it is a lowercase letter.
Explain why there are more substances on Earth than are listed on the
periodic table of elements. correct answer -Elements are pure substances
with only one type of atom. When two or more elements are combined,
compounds are formed. This allows more substances to be created on Earth.
Which of these statements did you include in your answer? Check all that
apply.
A. Elements are pure substances with only one type of atom.
, B. The substances on Earth are created when two or more elements are
combined.
C. Because elements can combine to form compounds, more substances can be
created on Earth. correct answer -A. Elements are pure substances with
only one type of atom.
B. The substances on Earth are created when two or more elements are
combined.
C. Because elements can combine to form compounds, more substances can be
created on Earth.
A scientist is conducting an investigation that involves water, silver, carbon
dioxide, and oxygen gas.Which group of statements best describe all of the
materials he is using in the investigation?
They are each compounds. Each of the compounds is made of atoms. All of the
atoms are made of matter.
They are each made of matter. Some are compounds and some are elements.
They all contain atoms.
They are all elements. Some contain molecules of the same type of atom. Some
contain different types of atoms.
They are each made of matter. Some are compounds made of one type of
element. Some are pure atoms. correct answer -They are each made of
matter. Some are compounds made of one type of element. Some are pure
atoms.
Which statement about enzymes is true?
An enzyme functions to increase the activation energy in a reacton.
Enzymes are proteins that function as catalysts in nonliving things.
Each enzyme can catalyze many different biochemical reactions.
Enzymes and substrates fit together like a lock and key. correct answer -
Enzymes and substrates fit together like a lock and key.
The graph below compares the rates of reaction of a burning candle and an
exploding firework.
