a water wave approaches a shallow beach what happens to its speed wavelength and frequency

ATI TEAS 7

TEAS Test 7 science quizlet

1. As a water wave approaches a shallow beach, what happens to its speed, wavelength, and frequency?

A. Speed increases, wavelength decreases, frequency increases.
B. Speed decreases, wavelength decreases, frequency remains the same.
C. Speed increases, wavelength increases, frequency decreases.
D. Speed, wavelength, and frequency remain the same.

Correct answer: B

Rationale: As a water wave approaches a shallow beach, the speed of the wave decreases due to the change in medium from deep to shallow water. According to the wave equation (speed = frequency x wavelength), if the speed decreases and the frequency remains the same, the wavelength must also decrease to maintain the equation balanced. This phenomenon occurs due to the wavefronts being slowed down by the shallower water, causing the wavelength to decrease while the frequency remains constant. Choice A is incorrect as the speed of the wave decreases in shallow water. Choice C is incorrect because the speed increases in deep water, not in shallow water. Choice D is incorrect as all the wave characteristics change when moving from deep to shallow water.

2. Which of the following is NOT a mechanism that can directly cause evolution by natural selection?

A. Mutations in genes
B. Differential survival and reproduction based on traits
C. Inheritance of acquired characteristics (like strong muscles from working out)
D. Competition for resources in an environment

Correct answer: C

Rationale: A) Mutations in genes can introduce new genetic variations into a population, which can be acted upon by natural selection. B) Differential survival and reproduction based on traits is a key component of natural selection, as individuals with advantageous traits are more likely to survive and pass on their genes to the next generation. C) Inheritance of acquired characteristics, also known as Lamarckism, is not a mechanism of evolution by natural selection. Traits acquired during an individual's lifetime (such as strong muscles from working out) are not passed on to offspring. D) Competition for resources in an environment can drive natural selection by favoring individuals with traits that help them better compete for limited resources. Therefore, the correct answer is C) Inheritance of acquired characteristics (like strong muscles from working out), as it is not a mechanism that can directly cause evolution by natural selection.

3. The endocrine system communicates through chemical messengers called:

A. Enzymes
B. Hormones
C. Antibodies
D. Neurons

Correct answer: B

Rationale: The correct answer is B: Hormones. The endocrine system communicates through hormones, which are chemical messengers produced by glands and released into the bloodstream to target specific cells or organs in the body. Enzymes are biological molecules that catalyze biochemical reactions, antibodies are part of the immune system, and neurons are cells that transmit nerve impulses. In this context, enzymes, antibodies, and neurons do not play roles in the endocrine system's communication process, making them incorrect choices.

4. Which of the following is an example of a correctly punctuated sentence?

A. Beatrice is very intelligent; however, she just does not apply herself well enough in her classes to make good grades.
B. Beatrice is very intelligent: she just does not apply herself well enough in her classes to make good grades.
C. Beatrice is very intelligent; she just does not apply herself well enough in her classes to make good grades.
D. Beatrice is very intelligent; she just does not apply herself well enough in her classes to make good grades.

Correct answer: D

Rationale: Option D is the correct answer as it uses a semicolon to correctly separate two independent clauses. In this sentence, 'Beatrice is very intelligent' and 'she just does not apply herself well enough in her classes to make good grades' are two independent clauses that are related but can stand alone as separate sentences. The semicolon is the appropriate punctuation mark to link these two closely related ideas. Choices A, B, and C are incorrect because they either use a comma splice (A), a colon (B), or lack appropriate punctuation (C) to separate the independent clauses.

5. Which of the following suffixes denotes a state or quality?

A. -ic
B. -ness
C. -ous
D. -ful

Correct answer: B

Rationale: The suffix "-ness" indicates a state or quality, as seen in words like "happiness" (the state of being happy). Choice A, "-ic," typically denotes characteristics or qualities, such as in "heroic." Choice C, "-ous," often signifies the presence of a quality or relationship, like in "poisonous." Choice D, "-ful," usually means full of or characterized by, as in "beautiful." Therefore, the correct answer is B because it best fits the description of indicating a state or quality.