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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Science | 36.8% | - Health Concepts
|
| Topic 2: Mathematics | 27.6% | - Measurement
|
| Topic 3: Verbal Ability | 35.6% | - Word Knowledge
|
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NEW QUESTION # 24
Word Knowledge
The word"precaution"most nearly means:
Answer: C
Explanation:
A precaution is an action taken to prevent harm or reduce risk. Option C best matches this meaning. NEX questions frequently use safety-related vocabulary.
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NEW QUESTION # 25
The polar covalent bond of a water molecule (H#O) is shown in the image.
Which example demonstrates that water has polarity?
Answer: C
Explanation:
Water is a polar molecule because it has an unequal distribution of electrical charge, with a slightly negative oxygen atom and slightly positive hydrogen atoms. This polarity causes water molecules to attract one another through hydrogen bonding. Option C demonstrates this property because water molecules stick together (cohesion) and do not mix with nonpolar substances like oil. Oil molecules lack polarity and cannot form hydrogen bonds with water, so the two substances separate into layers. The other options describe physical movement, gravity, or resistance, none of which are direct results of polarity. The NEX Science exam frequently tests molecular properties such as polarity by connecting them to real-world examples like oil and water separation. Recognizing hydrogen bonding and cohesion as outcomes of water's polarity is essential for answering these questions correctly.
NEW QUESTION # 26
Word Knowledge
The word"monitor"most nearly means:
Answer: B
Explanation:
Monitor means to watch, observe, or check regularly. Option A best matches this meaning. Monitoring is a common healthcare term.
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NEW QUESTION # 27
A rectangle's length and width are 4 centimeters (cm) and 6 cm. What is
1
2
2
1
the area of this rectangle?
(Given Area = length × width.)
Answer: A
Explanation:
This problem tests area formulas and fraction application. First calculate the full area of the rectangle using the given formula: Area = length × width. Multiply 4 cm by 6 cm to get 24 cm². The question asks for one- half of the area, not the total area. Divide 24 by 2: 24 ÷ 2 = 12 cm². Therefore, option B is correct. Option C is the full area, not half. Option A results from subtracting instead of dividing. Option D represents an incorrect partial calculation. NEX geometry questions often require careful reading to determine whether the question asks for total area or a fraction of it.
NEW QUESTION # 28
Veins throughout the body contain structures, indicated by arrows, in the image below.
The structures shown in the image prevent which of the following from occurring?
Answer: D
Explanation:
Veins contain one-way valves that prevent blood from flowing backward as it returns to the heart. These valves are especially important in veins of the arms and legs, where blood must move against gravity. When muscles contract, they push blood forward toward the heart, and the valves close behind it to prevent backflow. Without these valves, blood could pool in the veins, leading to conditions such as varicose veins.
The valves do not obstruct blood flow under normal conditions, nor do they prevent blood from leaking into surrounding tissues-that function is related to capillary walls. The NEX Science exam often emphasizes understanding how anatomical structures support physiological function, making venous valves a key cardiovascular concept.
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NEW QUESTION # 29
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