ATI TEAS 7
Chemistry
1. What is the mass number of an element?
- A. The number of protons in an atom's nucleus.
- B. The number of neutrons in an atom's nucleus.
- C. The number of electrons in an atom's valence shell.
- D. The number of isotopes of an element.
Correct answer: B
Rationale: The mass number of an element is the total number of protons and neutrons in the nucleus of an atom. It is represented by the symbol A and is written as a superscript to the element's symbol. For example, the mass number of carbon-12 is 12, which means that a carbon-12 atom has 6 protons and 6 neutrons in its nucleus.
2. When you get a goosebump, which type of muscle tissue is responsible for causing the hair follicles to stand on end?
- A. Skeletal muscle
- B. Smooth muscle
- C. Cardiac muscle
- D. None of the above
Correct answer: B
Rationale: When you get a goosebump, the type of muscle tissue responsible for causing the hair follicles to stand on end is smooth muscle. Smooth muscle is found in the skin attached to hair follicles and is controlled by the autonomic nervous system. When stimulated by factors like cold or emotional responses, the smooth muscle contracts, causing the hair to stand up and creating goosebumps. Skeletal muscle (choice A) is responsible for voluntary movements, cardiac muscle (choice C) is found in the heart and is responsible for pumping blood, and none of the above (choice D) is incorrect as smooth muscle is the correct answer in this case.
3. The structure surrounding and protecting the testes, maintaining optimal temperature for sperm production, is called the:
- A. Epididymis
- B. Vas deferens
- C. Scrotum
- D. Prostate gland
Correct answer: C
Rationale: The correct answer is C: Scrotum. The scrotum is the structure surrounding and protecting the testes. Its main function is to maintain the optimal temperature for sperm production by regulating the distance of the testes from the body to adjust to temperature changes. The epididymis (A) is a coiled tube where sperm mature, the vas deferens (B) is a duct that carries sperm from the testes to the urethra, and the prostate gland (D) is responsible for producing prostatic fluid that is a component of semen. Therefore, the scrotum plays a crucial role in protecting and regulating the temperature of the testes for proper sperm production.
4. What literary device is used in the line "The sea whispered secrets to the shore"?
- A. Alliteration
- B. Personification
- C. Onomatopoeia
- D. Hyperbole
Correct answer: B
Rationale: The sentence gives human qualities to the sea, like whispering, creating personification.
5. What is the meaning of the phrase "to be on the same page"?
- A. To be physically close
- B. To agree or understand each other
- C. To be sharing the same goal
- D. To be facing the same direction
Correct answer: B
Rationale: The phrase means to be in agreement or share the same understanding.
6. A child's toy block is a cube with side lengths of 5cm. What is its total surface area?
- A. 25 sq cm
- B. 50 sq cm
- C. 125 sq
- D. 150 sq cm
Correct answer: D
Rationale: Use the formula for surface area of a cube: 6 * (side length)^2 = 6 * (5cm)^2 = 125 sq cm.
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