Input: Answer this question:
Several interchangeable parts are used in the manufacture of automobiles. Some examples of these parts are batteries, windshield wiper blades, spark plugs, and tires. Which of the following is an advantage of interchangeable parts over non-interchangeable parts on automobiles?
OPTIONS:
- Interchangeable parts are generally more expensive than custom-made parts for automobiles.
- Interchangeable parts break more often now than in years past on most automobiles.
- Interchangeable parts are plentiful for custom-made automobiles.
- Interchangeable parts can fit many kinds of automobiles.
Answer: Interchangeable parts can fit many kinds of automobiles.

*Question*: Several tomato plants are grown indoors next to a sunny window. The plants receive water and fertilizer and remain on the windowsill. What will most likely happen? OPTIONS:
- Most of the leaves on the window side will wilt and die.
- The roots of the plants will grow upward from the soil.
- Water droplets will collect on the leaves facing away from the window.
- The stem will bend toward the window.
*Answer*: The stem will bend toward the window.

question:
Many common hand tools create a mechanical advantage by using the basic principles found in simple machines. For example, a screwdriver uses the principles of the wheel and axle. In order to increase gripping force, pliers use the principle demonstrated in the
OPTIONS:
- pulley.
- lever.
- wedge.
- screw.

answer:
lever.

[Q]: Water evaporates and falls back to Earth as rain or snow. What is the primary energy source that drives this cycle?
===
OPTIONS:
- The wind
- The Sun
- Air pressure
- Ocean currents
****
[A]: The Sun

question below:
A reflex can protect the body from harm. Which organ systems work together to produce a reflex?
OPTIONS:
- nervous and immune systems
- nervous and muscular systems
- circulatory and immune systems
- circulatory and muscular systems
answer below:
nervous and muscular systems

question:
Currently, Antarctica is the coldest and driest place on Earth. Paleontologists have found dinosaur fossils in rock layers below the ice. Based on this evidence, which is a reasonable conclusion about the climate of Antarctica in the past?
OPTIONS:
- Antarctica has always had the same climate as at present.
- At some time in the past, Antarctica was a hot, dry desert.
- At some time in the past, Antarctica was much warmer and wetter.
- At some time in the past, Antarctica was colder and wetter than it is now.

answer:
At some time in the past, Antarctica was much warmer and wetter.