1) Which would be considered an ecosystem? a. Bacteria living in a deep ocean vent
b. Biotic factors in a forest
c. Living and nonliving things in a pond
d. Populations of zebras and lions

Time ! for a smell to begin the process of registering in your brain, first you must a) inhale odor molecules into the nasal cavity b)transduce scent chemicals c)have a scent to inhale d)all answers can work

Describe the relationship and movement between temperature and density in a convection cell. make sure you identify the direction of travel

Drag each description to the correct location on the image. not all descriptions will be used. describe the parts of a comet. the frozen part of the comet the atmosphere of gases and dust formed when the nucleus vaporizes tail made of small, solid dust particles tail made of ions that appears to point away from the comet's orbit