1.4 Matter And The Scientific Method

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1. A tentative explanation for a set of observations that can be tested by further experimentation is referred to as

Hypothesis

A law

A theory

None of the above

sometimes referred to as an educated guess

Explanation

sometimes referred to as an educated guess

About This Quiz

Many science classes begin with the scientific method. Here we consider a systematic approach to discovery, including observation, hypothesis, experiment, conclusions, controls, and theories and laws.

2. All of the following are properties of tin. Which one is a chemical property of tin?

Tin can be hammered into a thin sheet.

At –40C a sheet of tin crumbles to a gray powder.

When a bar of tin is bent, it emits an audible “cry”.

Tin erodes when added to hydrochloric acid, and a clear gas forms.

malleabililty is physical
melting is physical
the tin is still tin when it "cries"
But when it reacts with HCl it forms new substances- that's physical

Explanation

malleabililty is physical
melting is physical
the tin is still tin when it "cries"
But when it reacts with HCl it forms new substances- that's physical

3. Choose the response that includes all the items listed below that are pure substances. 1. orange juice 2. steam 3. ocean water 4. oxygen 5. vegetable soup

1 only

2 4

1 3 4

4 only

there are numerous pure substance in orange juice, ocean water, and soup. However, steam is pure water, and oxygen is an element; both are pure.

Explanation

there are numerous pure substance in orange juice, ocean water, and soup. However, steam is pure water, and oxygen is an element; both are pure.

4. Which one of the following is an example of a physical property?

Dynamite explodes

Meat rots if it is not refrigerated

Gasoline burns

Ice floats on top of liquid water

A silver platter tarnishes

all are forming new substances except the ice floating- no chemical change there.

Explanation

all are forming new substances except the ice floating- no chemical change there.

5. A unifying principle that explains a body of facts and relations is referred to as

A hypothesis

A law

A theory

None of the above

scientists work their way up from clueless to a hypothesis , to a theory. then to a law, then they die. Just kidding.

Explanation

scientists work their way up from clueless to a hypothesis , to a theory. then to a law, then they die. Just kidding.

6. Which of the following is an example of a physical property?

Corrosiveness of sulfuric acid

Toxicity of cyanide

Flammability of gasoline

Neutralization of stomach acid with an antacid

Lead becomes a liquid when heated to 601C

when sulfuric acid corrodes something it turns it into something else- that's chemical
when cyanide is ingested it causes a chemical change in the patient
gasoline combines with oxygen to form carbon dioxide and water- a chemical change
stomach acid (hydrochloric acid) combines with a base to form salt and water- new substances are formed; this is a chemical change
when lead melts it simply becomes liquid lead; it is still lead; this is a physical change

Explanation

7. A concise verbal or mathematical statement of a relationship between phenomena that is always the same under the same conditions is referred to as

A hypothesis

A law

A theory

None of the above

a law should never be corrected; a law is the highest standard that science can hope to determine

Explanation

a law should never be corrected; a law is the highest standard that science can hope to determine

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Mar 20, 2023

Quiz Edited by
ProProfs Editorial Team
Dec 01, 2013

Quiz Created by
Harry Brielmann