Which of the following best describes the primary source of energy for Earth's climate system?

Solar radiation

Geothermal heat

Tidal forces

Human activities

Answer and Explanation

The Correct Answer is A

Choice A reason: Solar radiation delivers approximately 99.97% of Earth's climate system energy. The sun emits electromagnetic waves, primarily in visible and infrared spectra, absorbed by Earth's surface and atmosphere. This energy fuels atmospheric circulation, ocean currents, and the hydrological cycle, establishing temperature gradients that drive global weather and climate patterns. Sunspot cycles cause minor variations but affirm solar dominance.

Choice B reason: Geothermal heat, from radioactive decay in Earth's core and mantle plus residual formation heat, contributes only about 0.025% to the climate energy budget. It powers volcanic activity and tectonic processes, with localized effects like geothermal springs, but its role in atmospheric or oceanic circulation is negligible compared to solar radiation’s extensive influence.

Choice C reason: Tidal forces, driven by gravitational interactions between Earth, the moon, and the sun, produce oceanic tides, contributing less than 0.001% to the climate system’s energy. Tides influence coastal mixing but lack the magnitude to drive atmospheric circulation or global climate, making them insignificant compared to solar radiation’s vast energy input.

Choice D reason: Human activities, such as fossil fuel burning and deforestation, release greenhouse gases, altering climate by trapping solar heat. These are secondary effects, not primary energy sources, with negligible direct energy contribution. They modify solar radiation absorption, acting as feedback mechanisms, not independent drivers like the sun’s direct energy.

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Correct Answer is A

Explanation

Choice A reason: Weight-bearing exercises, like walking, stimulate bone formation by increasing osteoblast activity, improving bone density in osteoporosis. This reduces fracture risk, making it a key intervention to strengthen bones and enhance balance, preventing falls, which is critical for osteoporosis management.

Choice B reason: Restricting calcium-rich foods is inappropriate, as calcium is essential for bone health in osteoporosis. Dietary calcium supports bone mineralization, reducing fracture risk. Weight-bearing exercises are prioritized, as they directly enhance bone strength, unlike dietary restrictions that weaken bones.

Choice C reason: Limiting vitamin D supplementation is incorrect, as vitamin D enhances calcium absorption, supporting bone health in osteoporosis. Weight-bearing exercises are the priority, as they mechanically stimulate bone remodeling, improving density and reducing fracture risk more directly than supplements.

Choice D reason: Promoting bed rest increases bone loss in osteoporosis by reducing mechanical stress, which stimulates bone formation. Weight-bearing exercises are essential, as they enhance bone density and strength, preventing fractures, making bed rest counterproductive to osteoporosis management.

A. Teach the client to wear a mask, hand wash, and social distance to prevent spreading the virus B. Counsel family members to monitor for illness symptoms for 2 weeks after last contact with patient C. Isolate the client from other clients, family, and healthcare workers not wearing proper personal protective equipment D. Report the COVID-19 result to the local health department according to Centers for Disease Control and Prevention guidelines

Correct Answer is C

Explanation

Choice A reason: Teaching mask use, hand washing, and distancing is important for preventing COVID-19 spread but is secondary to immediate isolation. Suspected cases require prompt separation to minimize transmission risk, as symptoms like fever and anosmia suggest high infectivity, making isolation the priority action.

Choice B reason: Counseling family to monitor symptoms is a follow-up measure, not the immediate priority. Isolation prevents active transmission in the emergency department, where the client is currently located. Family monitoring is relevant post-discharge but secondary to containing the virus in the acute setting.

Choice C reason: Isolation is the most critical action for a suspected COVID-19 case, as symptoms like fever, anosmia, and aches indicate potential infectivity. Separating the client from others without proper PPE prevents airborne and droplet transmission, protecting patients and staff in the emergency department, making it the priority.

Choice D reason: Reporting COVID-19 results to health authorities is mandatory but occurs after test confirmation. Immediate isolation prevents transmission in the emergency department while awaiting results. Reporting is a secondary administrative action, as the priority is containing the virus in the acute care setting.

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Which of the following best describes the primary source of energy for Earth's climate system?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

The nurse is caring for a client with a new diagnosis of osteoporosis. Which intervention should the nurse include in the care plan?

Correct Answer is A

Explanation

A client presents to the emergency department with muscle aches, headache, fever, and describes a recent loss of taste and smell. The nurse obtains a nasal swab for COVID-19 testing. Which action is most important for the nurse to take?

Correct Answer is C

Explanation

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The nurse is caring for a client with chronic obstructive pulmonary disease who develops an onset of dyspnea and tachypnea with coughing. After positioning the client upright, which action should the nurse take next?

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The nurse is caring for a client with a history of gout. Which dietary recommendation should the nurse emphasize?

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