As Earth warms, upper layers of permafrost melt, producing waterlogged soil above frozen ground:
• Methane gas is released in anoxic environment
• Greenhouse effect is enhanced
• Earth warms, melting more permafrost

IS THIS A NEGATIVE OR POSITIVE FEEDBACK LOOP AND WHY?

Select the statement that is not true about the hubble telescope: a. it orbits above the earth, avoiding the light distortion caused by our atmosphere. b. it is mounted high on a hawaiian mountaintop to provide stable images. c. it has allowed scientists to see the formation of far-away stars and solar systems, leadin some certainty about the history of our own solar system. d. it has documented the destruction of far-away stars and galaxies, leading to some certa the theories of the life cycles of stars.

Which of the following is a resource outside the workplace that will you find information on safety and health issues? a.safety data sheets b.medical manuals c.the osha website d.work task and procedures intruction

Which composer was renowned for creating expressive gregorian chants? a. hildegard of bingen b. carlo gesualdo c. josquin desprez d. guillaume de machaut