Science Final Exam Study Test.
What is the difference between a mixture and a compound? - CORRECT ANSWER A mixture is made of
two or more substances that are not chemically combined whereas a compound is made of 2 or more
elements that are chemically combined.
Can the composition of a mixture vary? Explain. - CORRECT ANSWER Yes. The amounts of the various
components in the mixture can vary relative to each other. For example,a person could add one or two
spoons of sugar to their coffee.
Can the composition of a compound vary?Explain - CORRECT ANSWER No. The elements that make up
the compound are combined in fixed ratios. For example, water is always two atoms of hydrogen and
one atom of oxygen.
What is the difference between a compound and an element? Give two examples of each. - CORRECT
ANSWER A compound is a combination of 2 or more elements that are chemically bound together. An
element is just a single element. Sodium chloride (NaCl) is a compound and iron (Fe) is an element
What is the difference between an atom and a molecule? - CORRECT ANSWER An atom is the smallest
amount you can have of an element whereas a molecule is the smallest amount you can have of a
compound. A compound is made of atoms.
What is the difference between a heterogeneous mixture and a homogeneous mixture? Give an
example
of each - CORRECT ANSWER In a heterogenous mixture, it is possible to see the various components.
You can tell it is made up of more than one substance. An example is sand at the bottom of a beaker of
water. A homogeneous mixture looks like it is just one substance. You cannot notice that is made up of
different substances. An example is milk or Gatorade
What are three types of homogeneous mixtures? Give an example of each - CORRECT ANSWER Solution:
koolaid powder dissolve in water Suspension: clay powder suspended in water
Colloid: fog, homogenized mil
What is the difference between a mixture and a compound? - CORRECT ANSWER A mixture is made of
two or more substances that are not chemically combined whereas a compound is made of 2 or more
elements that are chemically combined.
Can the composition of a mixture vary? Explain. - CORRECT ANSWER Yes. The amounts of the various
components in the mixture can vary relative to each other. For example,a person could add one or two
spoons of sugar to their coffee.
Can the composition of a compound vary?Explain - CORRECT ANSWER No. The elements that make up
the compound are combined in fixed ratios. For example, water is always two atoms of hydrogen and
one atom of oxygen.
What is the difference between a compound and an element? Give two examples of each. - CORRECT
ANSWER A compound is a combination of 2 or more elements that are chemically bound together. An
element is just a single element. Sodium chloride (NaCl) is a compound and iron (Fe) is an element
What is the difference between an atom and a molecule? - CORRECT ANSWER An atom is the smallest
amount you can have of an element whereas a molecule is the smallest amount you can have of a
compound. A compound is made of atoms.
What is the difference between a heterogeneous mixture and a homogeneous mixture? Give an
example
of each - CORRECT ANSWER In a heterogenous mixture, it is possible to see the various components.
You can tell it is made up of more than one substance. An example is sand at the bottom of a beaker of
water. A homogeneous mixture looks like it is just one substance. You cannot notice that is made up of
different substances. An example is milk or Gatorade
What are three types of homogeneous mixtures? Give an example of each - CORRECT ANSWER Solution:
koolaid powder dissolve in water Suspension: clay powder suspended in water
Colloid: fog, homogenized mil
