TEAS Science Practice Test #5

Question 1

When it comes to trophic levels, which of the following is correct?

Accepted Answer

Tertiary consumers acquire less energy than primary consumers.

Answer

Energy transfer between trophic levels is inefficient, with only about 10% of energy being passed on from one level to the next. Primary consumers obtain energy directly from producers, while tertiary consumers feed on secondary consumers, who in turn feed on primary consumers. Therefore, tertiary consumers are several steps removed from the original energy source and acquire significantly less energy than primary consumers, who are closer to the producers.

Question 2

Why does the human eye see a red dress as red?

Accepted Answer

The molecules of the dress do not absorb red light wavelengths.

Answer

The color an object appears to be is determined by the wavelengths of light it reflects. A red dress appears red because its molecules absorb most other wavelengths of visible light (like green and blue) but reflect the red wavelengths. These reflected red wavelengths are then detected by our eyes, allowing us to perceive the dress as red.

Question 3

The type of light used in a lab experiment meant to measure how quickly plants develop when exposed to artificial light is an example of which type of variable?

Accepted Answer

independent

Answer

In a scientific experiment, the independent variable is the factor that is intentionally changed or manipulated by the experimenter to observe its effect. In this scenario, the type of light used is the variable being controlled and altered to see how it influences plant development, making it the independent variable. The plant development itself would be the dependent variable.

Question 4

Metabolism, mood, and growth are regulated by which organ system?

Accepted Answer

endocrine system

Answer

The endocrine system is a network of glands that produce and secrete hormones, which are chemical messengers. These hormones regulate a wide range of bodily functions, including metabolism (how the body uses energy), mood, growth and development, tissue function, and reproduction. The endocrine system plays a crucial role in maintaining homeostasis and coordinating various physiological processes.

Question 5

Why, in a vacuum, doesn't an elephant fall to the ground faster than a penny?

Accepted Answer

They both have an acceleration of 9.8 m/s2.

Answer

In a vacuum, all objects fall at the same rate regardless of their mass, due to the constant acceleration caused by gravity. This is because the force of gravity is proportional to mass, and acceleration is force divided by mass (F=ma). Without air resistance, the greater gravitational force on the elephant is exactly offset by its greater mass, resulting in the same acceleration (approximately 9.8 m/s²) as the penny.

TEAS Practice Test

TEAS Practice Test

TEAS Science Practice Test #5