The human population of the Central Valley region of California almost doubled between 1962 and 2002. The graph below shows the change in groundwater storage of several areas within the region during this time of population growth.
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.
An increase in the human population only impacts surface sources of consumable water.
B.
As the human population increases, water consumption generally increases.
C.
As the human population increases, water consumption generally decreases.
D.
An increase in the human population does not impact water consumption on a large scale.
B. As the human population increases, water consumption generally increases.
In the image of the billiard table below, a cue ball is about to be struck and pushed toward the other balls.
When the cue ball collides with the other balls, it will slow down and the other balls will be set in motion. Which statements best describes why?
A.
The cue ball loses all of its kinetic energy, and the other balls gain some kinetic energy.
B.
The cue ball loses some kinetic energy, and the other balls gain some kinetic energy.
C.
The cue ball loses some of its potential energy, and the other balls gain some kinetic energy.
D.
The cue ball loses all of its kinetic energy, and the other balls gain some potential energy.
B. The cue ball loses some kinetic energy, and the other balls gain some kinetic energy.
Polar bears in Arctic ecosystems hunt and eat seals as a primary food source. Seals live on Arctic sea ice.
polar bears walking on sea ice
The availability of seals is a limiting factor for a certain population of polar bears. If Arctic sea ice in this ecosystem begins to melt, what will most likely happen to this polar bear population?
A.
It will increase because the polar bears will swim to find food instead.
B.
It will stay the same because polar bears can live without food for long periods of time.
C.
It will stay the same because the polar bears can use other food sources
D.
It will decrease because the polar bears will be unable to catch seals for food.
D. It will decrease because the polar bears will be unable to catch seals for food.
Two coyotes are running across the snow.
The coyotes are running at the same speed. One of the coyotes has a mass of 10 kg, and the other coyote has a mass of 12 kg. Which of the following is true?
A.
The 12-kg coyote has more kinetic energy than the 10-kg coyote.
B.
The 10-kg coyote has more kinetic energy than the 12-kg coyote.
C.
Neither coyote has any kinetic energy because they are on the ground.
D.
Both coyotes have the same kinetic energy because they are running at the same speed.
D. Both coyotes have the same kinetic energy because they are running at the same speed.
Two balloons are rubbed with wool, giving each a negative charge. The balloons are then attached to a table using tape and string, as shown below.
Which of the following actions will increase the electric potential energy between the two balloons?
A.
separating the two balloons
B.
bringing the two balloons closer together
C.
releasing both balloons into the air
D.
adding two inches to the length of both strings