A negative effect of the invention and use of paper is the OPTIONS:
- increased use of glass bottles.
- increased number of trees cut down.
- decreased pollution in trash dumps.
- decreased amount of books to read.
A: increased number of trees cut down.

A student is trying to identify a mineral that has a nonmetallic luster and is black. It can also be scratched with a fingernail. According to the mineral reference sheet, the unidentified mineral is most likely OPTIONS:
- mica.
- magnetite.
- hornblende.
- quartz.
A: mica.

A bowling ball sitting motionless on a table exerts a downward force on the table. The force exerted by the table must be OPTIONS:
- equal to the force of the ball.
- continually changing with the ball.
- greater than the force of the ball.
- less than the force of the ball.
A: equal to the force of the ball.

A student pushes a shopping cart filled with groceries. The cart has a mass of 12 kilograms (kg). The student pushes the cart with a force of 15 newtons (N). Assuming the ground is frictionless, how fast will the cart accelerate until the student stops applying the force? OPTIONS:
- 0.625 m/s^2
- 0.8 m/s^2
- 1.25 m/s^2
- 2.5 m/s^2
A:
1.25 m/s^2