A Quiz About Reading Comprehension

1. The pronoun "it" in line I refers to

Carbon dating

The age

Any organic natural material

Archeology

The pronoun "it" in line I refers to carbon dating. Carbon dating is a method used in archeology to determine the age of organic natural materials.

Explanation

The pronoun "it" in line I refers to carbon dating. Carbon dating is a method used in archeology to determine the age of organic natural materials.

2. The word "estimate" in line 1 closest in meaning to

Understand

Hide

Rate

Approximate

The word "estimate" in line 1 is closest in meaning to "approximate." This is because an estimate is an approximate calculation or judgment of the value, amount, or extent of something. It is not an exact or precise measurement, but rather a rough approximation. Therefore, "approximate" is the most suitable synonym for "estimate" in this context.

Explanation

The word "estimate" in line 1 is closest in meaning to "approximate." This is because an estimate is an approximate calculation or judgment of the value, amount, or extent of something. It is not an exact or precise measurement, but rather a rough approximation. Therefore, "approximate" is the most suitable synonym for "estimate" in this context.

3. Which of the following is not trus about carbon 14

It is radioactive

It’s half-life is more than 5000 years

It and nitrogen always exist in equal amounts in any substance

It can decay into nitrogent 14

Carbon 14 and nitrogen do not always exist in equal amounts in any substance. Carbon 14 is a radioactive isotope of carbon with a half-life of about 5730 years. It can decay into nitrogen 14 through the process of beta decay. This means that over time, the amount of carbon 14 in a substance will decrease while the amount of nitrogen 14 will increase. Therefore, the statement that carbon 14 and nitrogen always exist in equal amounts in any substance is not true.

Explanation

Carbon 14 and nitrogen do not always exist in equal amounts in any substance. Carbon 14 is a radioactive isotope of carbon with a half-life of about 5730 years. It can decay into nitrogen 14 through the process of beta decay. This means that over time, the amount of carbon 14 in a substance will decrease while the amount of nitrogen 14 will increase. Therefore, the statement that carbon 14 and nitrogen always exist in equal amounts in any substance is not true.

4. The expression "is left" in paragraph 3

Remains

Has disappeared

Changes

Is gone

The expression "is left" in paragraph 3 indicates that something still exists or continues to be present. It suggests that despite other changes or actions taking place, this particular thing remains unaffected or unchanged.

Explanation

The expression "is left" in paragraph 3 indicates that something still exists or continues to be present. It suggests that despite other changes or actions taking place, this particular thing remains unaffected or unchanged.

5. This page is mainly about

The defferences between carbon -14 and nitrogen.

One method of dating old objects

Archeology and the study of ancient artifacts

Various use for carbon.

This page is mainly about one method of dating old objects. It discusses the differences between carbon-14 and nitrogen, which are used in this dating method. It also mentions archeology and the study of ancient artifacts, which are closely related to the dating of old objects. Additionally, it briefly mentions the various uses for carbon, which may be relevant to the dating process.

Explanation

This page is mainly about one method of dating old objects. It discusses the differences between carbon-14 and nitrogen, which are used in this dating method. It also mentions archeology and the study of ancient artifacts, which are closely related to the dating of old objects. Additionally, it briefly mentions the various uses for carbon, which may be relevant to the dating process.