Which of the following does NOT help to make acid precipitation? A) water and oxygen in the atmosphere
B) a decrease in the pH of a lake
C) car exhaust
D) sulfur and nitrogen gas

Which statements describe resources? one of the factors people use when deciding where they will live is the availability of resources. renewable resources have little value for people. resources are unevenly distributed throughout the world. energy is the world resource which has the highest use. the use of nonrenewable resources has decreased in recent history. the use of resources is evenly distributed throughout the world. the world's oil supply will last for the next forty years if its use continues as expected.

Which term describes a normal value for something in the body? a. homeostasis b. set point c. feedback loop d. integration center

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