For 3 years mariah has played her trombone at the school's sports stadium most friday nights for various sporting events as part of the school's pep band. one friday night mariah begins to walk down the school's tall stadium bleachers with her trombone and she trips and falls down several stairs bruising her leg and feelings humiliated as the people around her look at her and some students even laugh. ever since that incident, each time mariah walks down the bleacher stairs she looks to see who is around her and her heart rate increases as she nervously walked down the bleacher stairs.
unconditioned stimulus:
unconditioned response:
conditioned stimulus:
conditioned response:

answer and explanation;

the only real purpose of sputnik 1 was to beat the us into space. we were getting close to launching a useful satellite, explorer 1 - which launched on january 31, 1958. the ussr had to beat that, so they launched sputnik 1 on october 4, 19

a sonic boom is a loud boom that breaks the sound barrier

explanation:

bacteria that live on the ocean floor are sustained by phytoplankton. phytoplankton, microscopic marine photosynthetic organisms, have a vastly significant role to play not only in the marine food web of which they’re part of, but also on a more global scale. despite their infinitely small size in comparison to other marine organisms, these tiny creatures occupy an immensely important ecological niche: they are the foundation of the marine food web, and as primary producers, play key roles in supporting all other organisms in the marine environment, as well as in the regulation of the earth’s climate through the sequestration of carbon, oxygen production, and other related processes. phytoplankton account for roughly half of all global primary productivity; therefore, their significance extends far beyond the marine environment alone. there is an intriguing sense of irony in the realization that these tiny living beings that often live out their existence unnoticed and undetected by the rest of the world, have such a far-reaching impact on the lives of virtually all other living organisms on the planet, particularly on those in the marine environment. the world that we have become accustomed to has been and is continuously shaped by the workings of these miniscule yet vital “plants of the sea”.

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