On the pH scale 5 is _________ and 10 is ________.

Identify an example of a top-down factor that can control population size and describe how it works. (Make sure to clearly describe your answer and write in complete sentences.)

Describe 2 ways earthquakes can cause environmental problems (other than people being harmed from collapsed buildings and other structures). (Make sure to clearly describe each answer and write in complete sentences.)

Which type of population distribution is the most common?

According to the rock cycle, each of the following is correct except _______.

Which of the following is an organic macromolecule found in all living things?

Volcanoes form in an arc along this type of boundary.

Describe 2 ways that humans impact the water cycle (does not include water pollution). (Make sure to clearly describe each answer and write in complete sentences.)

Which biogeochemical cycle is the only one without an atmospheric component? 

Use Passage 1-1. Constants in this experiment are __________.