Chemistry 1 Exam Review

2.

What is the Meaning of " Hect(a) " ?

1/1000
100
1000
10
1/100

Correct Answer

A. 100

Explanation

The correct answer is 100. "Hect(a)" is a prefix that denotes a factor of 100 in the metric system. For example, hectometer is equal to 100 meters, hectogram is equal to 100 grams, and hectoliter is equal to 100 liters. Therefore, the meaning of "Hect(a)" is 100.

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3.

What is the Meaning of "Deca" ?

100000
1000
1/100
1/10
10

Correct Answer

A. 10

Explanation

The term "Deca" is a prefix derived from the Greek word "deka," which means ten. It is commonly used in the metric system to indicate a factor of ten. Therefore, the correct answer is 10, as it represents the meaning of "Deca" as ten.

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4.

What is the meaning of 'Centi' ?

1/1000
10
1/100
1000
1/10

Correct Answer

A. 1/100

Explanation

The meaning of 'Centi' is 1/100. In the metric system, centi- is a prefix that denotes one hundredth of a unit. For example, there are 100 centimeters in a meter, and 100 centigrams in a gram. Therefore, the correct answer is 1/100.

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5.

List the six steps of the scientific method in order.

Correct Answer
1. Define the problem 2.Research the data 3.Form the hypothesis 4.experment to test the hypothesis 5.record results 6.draw conclusion

Explanation
The scientific method is a systematic approach used to investigate and understand phenomena in the natural world. The six steps of the scientific method in order are as follows: 1. Define the problem, which involves identifying and clearly stating the question or issue to be investigated. 2. Research the data, which involves gathering information and existing knowledge related to the problem. 3. Form the hypothesis, which is a proposed explanation or prediction based on the available data. 4. Experiment to test the hypothesis, which involves designing and conducting experiments to gather new data and evidence. 5. Record results, which involves collecting and analyzing the data obtained from the experiments. 6. Draw conclusions, which involves interpreting the results and determining whether the hypothesis is supported or rejected based on the evidence gathered.

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6.

What are the four phases of matter

Gas,plasma
Solids, liquids,gas
Solids , liquids , plasma, gasses
Mass, weight
Solids,liquids,plasma

Correct Answer

A. Solids , liquids , plasma, gasses

Explanation

The four phases of matter are solids, liquids, plasma, and gases. Solids have a definite shape and volume, while liquids have a definite volume but take the shape of their container. Plasma is a highly ionized gas that conducts electricity, and gases have neither a definite shape nor volume and can expand to fill their container.

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7.

How can you visually / kinesthetically tell a chemical reaction has taken place?

8.

Words associated with a chemical change include

Reacts with, burns
Melting, boiling
Evaporating and dissolving
Reacts with , ignites
Freezing

Correct Answer

A. Reacts with, burns

Explanation

The words "reacts with" and "burns" are associated with a chemical change because they indicate a reaction or combustion process where a substance interacts with another substance, resulting in a chemical transformation and the release of energy. These words imply that a chemical reaction is occurring, leading to a change in the composition and properties of the substances involved.

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9.

Words associated with physical change include

Freezing, boiling, melting, reacts with
Vaporizing and dissolving, burns
Reacts with burns
Meliting , boling and freezing, sublimating.
Burns, condensating.

Correct Answer

A. Meliting , boling and freezing, sublimating.

Explanation

The words associated with physical change include melting, boiling, freezing, and sublimating. These words describe the different processes in which a substance changes its physical state. Melting refers to the change from a solid to a liquid, boiling is the change from a liquid to a gas, freezing is the change from a liquid to a solid, and sublimating is the change from a solid directly to a gas without passing through the liquid state. These processes do not involve any chemical reactions and only affect the physical properties of the substance.

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10.

Define Accuracey

Correct Answer
refers to how close,comes to its accepted value

Explanation
The definition provided accurately explains accuracy. Accuracy is the measure of how close a value or measurement is to its accepted or true value. It indicates the level of precision and correctness in a measurement or calculation.

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1

11.

Define precision

Correct Answer
refers to how often the same measurements, etc can be repeated.

Explanation
The given answer is incorrect. Precision refers to the degree of agreement or consistency between repeated measurements or observations of the same quantity. It is not about how often the measurements can be repeated, but rather about the consistency of the results when the measurements are repeated. A high precision means that repeated measurements will closely agree with each other, while a low precision means that repeated measurements will vary widely.

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Chemistry 1 Exam Review

What is the Meaning of 'Kilo' ?

Quiz Preview

What is the Meaning of " Hect(a) " ?

What is the Meaning of "Deca" ?

What is the meaning of 'Centi' ?

List the six steps of the scientific method in order.

What are the four phases of matter

How can you visually / kinesthetically tell a chemical reaction has taken place?

Words associated with a chemical change include

Words associated with physical change include

Define Accuracey

Define precision