teas 7 science practice questions - Nurselytic

Correct Answer: C

Rationale:
A) Population refers to a group of individuals of the same species living in a specific area.

B) Community refers to all the populations of different species living and interacting in a particular area.

C) Biome is a large geographic area characterized by similar climate, plants, and animals. Biomes are defined by factors such as temperature, precipitation, and vegetation types.

D) Ecosystem refers to a community of living organisms interacting with each other and their physical environment. An ecosystem can be part of a biome.

Correct Answer: B

Rationale: Energy is the capacity to do work, while power is the rate at which work is done or energy is transferred. Power is the amount of energy transferred or converted per unit time.
Therefore, energy is related to power as the rate at which work is done.
Choice A is incorrect because power and energy are not the same; they are related concepts but represent different aspects.
Choice C is incorrect because power does not refer to stored energy but rather the rate of energy transfer.
Choice D is incorrect because energy is not the rate at which power is transferred, but the capacity to do work or cause change.

Correct Answer: B

Rationale: Viscosity is the property that describes a substance's resistance to flow. A substance with high viscosity flows slowly, while a substance with low viscosity flows quickly. Density (
A) is the measure of mass per unit volume; conductivity (
C) is the ability of a material to conduct electricity or heat, and reactivity (
D) refers to how readily a substance undergoes chemical reactions.
Therefore, the correct answer is B, viscosity, as it directly relates to a substance's resistance to flow.

Correct Answer: D

Rationale: Bradycardia refers to an abnormally slow heart rate, typically defined as less than 60 beats per minute. This condition can result in inadequate blood flow to meet the body's demands. It is crucial to distinguish between bradycardia and tachycardia, which is a fast heart rate, as they require different management strategies. Options A, B, and C are incorrect because they describe normal, slightly elevated, and significantly elevated heart rates, respectively, rather than an abnormally slow heart rate characteristic of bradycardia. Recognizing bradycardia is essential for appropriate evaluation and intervention in clinical settings.

Correct Answer: B

Rationale: The mass number of an element represents the total number of protons and neutrons in the nucleus. This information is crucial for determining the atomic mass of the element and understanding its stability and isotopes. The number of protons in the nucleus (option
A) is represented by the atomic number, not the mass number. The number of electrons in the valence shell (option
C) is related to the element's position in the periodic table and its chemical properties, but it is not directly determined by the mass number. The element's chemical reactivity (option
D) is influenced by the number and arrangement of electrons in the atom's energy levels, not by the mass number.