When scientists make a model to study a system, such as a coral reef or the human body, which of these should they be sure to include? include only inputs include no set boundaries include a limited number of parts include both biotic and abiotic influences

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

The three types is stress that act on earths rocks are compression, tension, and

Which of these statements best explains why space exploration should be encouraged? it prepares humans to live without oxygen. it dispel myths about objects in space. it prevents comets and asteroids from striking earth. it creates technology to absorb harmful radiations in space.