Alcohol, barbiturates, and opiates calm neural activity and slow body functions. they belong to which category of psychoactive drugs?

The specific heat of ice is 0.5 calories/gram°c. 20 grams of ice will require ll calories to raise the temperature 1°c. 05

About how many years does it take for one cycle of surface water to become deep water and then surface water again in the oceans? 101001,000

Write a paragraph explaining how energy flows through an ecosystem using the following terms: energy pyramid, trophic level, producer, primary consumer, decomposer, sun, secondary consumer, and tertiary consumer. .