Examlex
Describe the difference between reliability and validity.
Upwelling
The oceanographic phenomenon that occurs when deep, cold, nutrient-rich water rises towards the surface, promoting the growth of plankton and supporting marine ecosystems.
Phytoplankton
Microscopic plant-like organisms that float in water bodies; they are the primary producers in aquatic ecosystems.
Radioactive Isotope
An isotope of an element that has an unstable nucleus and emits radiation during its decay to a stable form.
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