Chemicals, garbage, and waste from power and manufacturing plants can often end up in Earth's oceans.
polluted ocean water
Image Courtesy of NOAA
A scientist is studying the impact of a new manufacturing plant on the local ocean ecosystem. How could she best monitor the impact of the manufacturing plant on populations in this ecosystem?
A.
She could add a chemical to the water to react with the waste products that the manufacturing plant is dumping into the marine ecosystem.
B.
She could ask the manufacturing plant to treat all of the waste products that they are dumping into the marine ecosystem.
C.
She could collect data on the amount of product made by the manufacturing plant and how much the product sells for in local cities.
D.
She could perform several wildlife surveys over time to observe any changes in the number and type of marine organisms in the ecosystem.
7 answers
Image courtesy of USGS
The bold, dark blue line on the graph represents the change for the entire Central Valley groundwater system, which is the largest water reservoir in the state of California. Based on the graph, which of the following is true?
A.
As the human population increases, water consumption generally decreases.
B.
An increase in the human population only impacts surface sources of consumable water.
C.
An increase in the human population does not impact water consumption on a large scale.
D.
As the human population increases, water consumption generally increases.
ball and stick model of a water molecule
Sadie's model is useful, but it cannot show her everything about a real water molecule. Which of the following is a disadvantage of Sadie's model?
A.
It cannot show the relative size of oxygen and hydrogen atoms.
B.
It cannot show the angle of the bond between the atoms.
C.
It cannot show how one water molecule interacts with another.
D.
It cannot show the number of atoms in the molecule.