The component of an atom that possesses relatively little mass, thus being negligible in calculating the atomic mass number, is the:

A. Electron

B. Quark

C. Neutron

D. Proton

Answer Explanation:

Rationale

Electrons are subatomic particles that have relatively little mass and are negligible when calculating atomic mass. The atomic number is usually the sum of protons and neutrons in the nucleus of the atom.

Therefore, the Correct Answer is A.

Q #1: Experiments cannot validate hypotheses, only falsify them The statement above can be restated in which of the following ways?

A. Until disproved, an exploration for an observation is valid

B. A hypothesis that has not been falsified remains provisional

C. Certain concepts cannot be subjected to direct experimentation

D. Proving a hypothesis exempt from further testing

Answer Explanation

This means that a hypothesis is considered valid until it is disproved by experimental evidence. However, even if a hypothesis has not been falsified, it is still considered provisional and subject to further testing and scrutiny.
Q #2: Which of the following tools can be used to measure the turbidity of a liquid by measuring the transmission of light through the sample?

A. Spectrophotometer

B. Centrifuge

C. Electro photometer

D. Microdensitometer

Answer Explanation

A spectrophotometer is an instrument that measures the intensity of light absorbed after it passes through a sample solution. With the spectrophotometer, the concentration of a chemical substance can be determined by measuring the intensity of light detected.
Q #3: Which of the following processes causes most of the carbon dioxide from the blood to move into the alveoli?

A. Passive transport using carrier proteins

B. Conversion to carbon monoxide

C. Active transport using energy

D. Diffusion down a concentration gradient

Answer Explanation

Most of the carbon dioxide from the blood moves into the alveoli through the process of diffusion down a concentration gradient. In the lungs, there is a higher concentration of carbon dioxide in the blood compared to the alveoli. Its molecules, therefore, move from an area of higher concentration (blood) to an area of lower concentration (alveoli) until equilibrium is reached. This is a passive process and does not require energy or carrier proteins.

Free Access on TEAS 7 Exams and Study Notes

Access to all TEAS 7 Exams
Performance Tracking and Analysis
Well Documented and Explained Questions and Answers
2000+ Questions and Correct Answers: Answers Well Explained
Libary of Detailed StudyNotes
Topical Questions and Answers on Examinable topics

Join Now

The component of an atom that possesses relatively little mass, thus being negligible in calculating the atomic mass number, is the:

More Questions on TEAS 7 Science

Q #1: Experiments cannot validate hypotheses, only falsify them The statement above can be restated in which of the following ways?

Answer Explanation

Q #2: Which of the following tools can be used to measure the turbidity of a liquid by measuring the transmission of light through the sample?

Answer Explanation

Q #3: Which of the following processes causes most of the carbon dioxide from the blood to move into the alveoli?

Answer Explanation

Free Access on TEAS 7 Exams and Study Notes

TEAS 7 Exams (Q&A)

TEAS 7 Study Notes

TEAS 7 Topical Tests

TEAS 7 Study Guides

Quick Links

Refer a Friend