Earth's rotation (turning on its axis) causes OPTIONS:
- the seasons to change.
- the Moon to appear as different shapes.
- day and night.
- solar eclipses.
A: day and night.

The surface of a heated metal object measures 120C. It is dropped into a bucket filled with water measuring 10C. Which of the following is most likely to occur? OPTIONS:
- Both the water and metal will adjust to the same temperature below 10C.
- The water and metal will adjust to different temperatures above 120C.
- The water will remain the same temperature, but the metal will cool to 10C.
- The water and metal will adjust to the same temperature between 10C and 120C.
A: The water and metal will adjust to the same temperature between 10C and 120C.

A student observes cells in an object by using a microscope. The student thinks that the object was part of a living thing. Which statement explains why cell theory can be used to support the student's thinking? OPTIONS:
- Cell theory was developed using a microscope.
- Cell theory was developed to study living things.
- Cell theory states that all living things are made of cells.
- Cell theory states that scientists may classify things as living or nonliving.
A: Cell theory states that all living things are made of cells.

Bats find their prey at night using one of their senses to detect echoes. What does the bat send out to find prey? OPTIONS:
- odors
- light
- sound
- electricity
A:
sound