أسئلة المراجعة

تدفق خارجي غير مقاس

• Separate physical evidence from value judgements. A stock is an amount at a time; a flow is an amount per time. Sustainability decisions require ecological, social and economic evidence and a stated scale.

570

• Appropriate relation; consistent substitution; correct result; meaningful unit and interpretation.

استخدم خط مسار مع مسافات عينة ثابتة

• Estimate total abundance by multiplying mean density by area, with consistent units. This assumes sampled areas represent the habitat. Patchiness and too few samples widen uncertainty.

12

• Appropriate relation; consistent substitution; correct result; meaningful unit and interpretation.

تساويها

• Compare surveys with similar area, effort, season and identification rules. A diversity index is meaningful only with its formula and conventions specified. Habitat fragmentation can affect movement and gene flow even when total area changes little.

4 نوع

• Appropriate relation; consistent substitution; correct result; meaningful unit and interpretation.

يقل التركيز لكن كتلة الملوث تظل ثابتة

• Distinguish concentration from total pollutant load. Dilution can reduce concentration without removing the pollutant mass. A management plan should consider upstream causes, users and effects on other parts of the catchment.

600 ملغ/دقيقة

• Appropriate relation; consistent substitution; correct result; meaningful unit and interpretation.

المحصول مقسوماً على المساحة المزروعة

• Distinguish total yield from yield per area and energy input. Sustainable management must consider regeneration rates and impacts beyond the farm boundary. Different stakeholders may rank food security, biodiversity and income differently.

4 طن/هكتار

• Appropriate relation; consistent substitution; correct result; meaningful unit and interpretation.

رفع المعدات الكهربائية الهشة فوق مستوى الفيضان المتوقع

• Distinguish mitigation, which addresses drivers, from adaptation, which reduces harm from impacts. A policy assessment needs evidence about effectiveness, cost, equity and uncertainty; one criterion is not the entire decision.

30 %

• Appropriate relation; consistent substitution; correct result; meaningful unit and interpretation.

الهجرة

• Compare rates with a common denominator and interval. An average can hide unequal access to services. At HL, evaluate how economic incentives, legal responsibilities and ethical priorities change an urban management proposal.

2 %

• Appropriate relation; consistent substitution; correct result; meaningful unit and interpretation.

ميزان يقرأ 0.20 غرام وهو فارغ

• For a product or quotient, adding fractional uncertainties is a common maximum-uncertainty approximation. For a difference, add absolute uncertainties. A nonzero intercept can reveal an offset or an incomplete model.

2.5 %

• Appropriate relation; consistent substitution; correct result; meaningful unit and interpretation.