Which of the following best defines scientific method?

a. ways scientists make problems and ask questions

b. ways scientists never solve problems

c. ways scientists answer questions and solve problems

d. all of the above

Which of the following questions is an example of a good scientific method question?

a. What makes balls bounce?

b. Why are tennis balls green?

c. Will tennis balls or soccer balls bounce higher?

d. Why are soccer balls bigger than tennis balls?

Which of the following substance is an element

a. air
b. iron
c. salt
d. sugar

Which of the following is a property of an element

a. The simplest substance.

b. composed of two or more types of atoms.

c. be separated through a chemical process.

d. composed of two or more types of substances.

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