Chemical weathering can be caused by
o a) acid rain
o b) sublimation
o c) evaporation
o d) condensation

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?

Which tool could you see a plant cell? a. a filter b. a microscope c. a microwave d. an electromagnet

As scientists have investigated evolution from a variety of fields, they have found that some of darwin's orginal ideas were inaccurate or incomplete. t explanation provided by evolution was updated each time to reflect the new information they found. what does this suggest about the theory of evolution? it has become a stronger and clearer theory as new information is collected.