TEAS Physics: Key Concepts for Exam Success

ATI TEAS 7

physics

1. When does work on an object occur?

A. Only when the object's velocity changes
B. Only when a force is applied to the object
C. Whenever there is a force exerted on the object causing displacement
D. Only when the object is lifted vertically

Correct answer: c

Rationale: Work is done when a force is applied to an object, causing it to move in the direction of the force.

2. What is the purpose of genetic counseling?

A. To treat genetic disorders.
B. To diagnose genetic diseases in newborns.
C. To provide information and support to individuals and families with genetic risks.
D. To collect DNA samples for research purposes.

Correct answer: C

Rationale: To provide information and support to individuals and families with genetic risks. Genetic counselors explain the implications of genetic testing, discuss risks and options, and offer emotional and psychological support.

3. Which of the following is an example of a decomposition reaction?

A. 2H2 + O2 â†’ 2H2O
B. CaCO3 â†’ CaO + CO2
C. 2Na + Cl2 â†’ 2NaCl
D. N2 + 3H2 â†’ 2NH3

Correct answer: b

Rationale: Decomposition reactions involve the breakdown of a compound into simpler substances.

4. When water boils, it changes from a liquid to a gas. This is an example of a:

A. Chemical reaction
B. Physical change
C. Nuclear reaction
D. Biological process

Correct answer: B

Rationale: Physical change - Boiling water involves a change in state, not the chemical composition of the molecules. Chemical reactions involve breaking and forming new bonds, which is not the case here.

5. What is the function of arrector pili muscles?

A. To control sweat production
B. To contract and cause goosebumps
C. To produce sebum
D. To sense touch

Correct answer: B

Rationale: The correct answer is B: 'To contract and cause goosebumps.' Arrector pili muscles are small muscles attached to hair follicles in the skin. When these muscles contract, they cause the hair to stand upright, resulting in the appearance of goosebumps. This physiological response is a remnant of our evolutionary past when our ancestors had more hair, and the raised hair helped to trap air for insulation or to make them look larger when threatened. Therefore, the function of arrector pili muscles is not to control sweat production (A), produce sebum (C), or sense touch (D), but rather to create the physical response of goosebumps.