Which of the following are characteristics of conservation in school-aged children? (Select All that Apply.)
Thinking that cutting a sandwich into more pieces means there is more food
Believing that pouring water from a short, wide cup into a tall, narrow cup increases the amount of water
Understanding that the amount of a substance remains the same even if its appearance changes
Recognizing that a ball of clay can be flattened and rolled back into a ball without changing its amount
Believing that a taller, narrower glass contains more liquid than a shorter, wider glass
Correct Answer : C,D
A. This reflects a lack of understanding of conservation, as cutting a sandwich does not increase the quantity of food.
B. This belief shows a misunderstanding of conservation, where children may not recognize that the volume remains constant regardless of the container's shape.
C. Understanding that the amount of a substance remains the same even if its appearance changes is a key characteristic of conservation.
D. Recognizing that a ball of clay can be flattened and rolled back into a ball without changing its amount also demonstrates an understanding of conservation.
E. This belief indicates a misunderstanding of conservation, as the amount of liquid does not change based on the height or width of the container.
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Correct Answer is ["C","D","E"]
Explanation
A. Vocal changes are more pronounced in boys during puberty; girls typically do not experience significant vocal changes.
B. Height does not decrease; instead, girls experience a growth spurt during puberty before reaching their adult height.
C. Breast development is one of the first signs of puberty in girls, typically occurring between ages 8 and 13.
D. Menarche, the first menstrual period, usually occurs later in puberty and is an important milestone indicating the onset of reproductive capability.
E. Increased axillary hair growth is also a common change that occurs during puberty as hormone levels rise.
Correct Answer is B
Explanation
A. This option is incorrect as it does not describe the expected blood pressure difference in coarctation of the aorta.
B. Coarctation of the aorta typically presents with higher blood pressure in the upper body (arms) and lower blood pressure in the lower body (legs) due to the obstruction of blood flow distal to the aortic arch.
C. This option is incorrect because while coarctation can lead to decreased perfusion in the lower extremities, it does not typically result in decreased blood pressure in both the arms and legs simultaneously.
D. While increased blood pressure may occur in the arms, the legs would not typically show increased blood pressure in cases of coarctation.