Which environmental changes occur faster?

global warming

oil spill

pond succession

changing seasons

Which of the following best describes the purpose of technology?

The circles, or orbits, for electrons are called energy levels. each level can hold only a certain number of electrons. add electrons to each level until you can't add any more. how many electrons can each level hold?

Researchers want to use edna to look for an invasive species in the water which of the steps would be likely do last