The students in an engineering class built a robot that stacks wooden blocks. A built-in computer controls the movement of the robot. The computer in the robot performs a function most similar to which part of the human body? OPTIONS:
- lungs
- heart
- brain
- arms
A: brain

Sherry is going to use her computer to draw a three-dimensional box. She wants to be able to specify the exact dimensions and angles and to rotate the box as needed on the screen. Which of the following types of programs would Sherry most likely use for this purpose? OPTIONS:
- word processing software
- math spreadsheet program
- Internet-based search engine
- computer-aided design program
A: computer-aided design program

Which renewable resource is used with photovoltaic cells to produce electricity? OPTIONS:
- hydrothermal energy
- solar energy
- geothermal energy
- nuclear energy
A: solar energy

Iron oxides, such as rust, form when iron metal reacts with oxygen in the air. What are the chemical symbols for the two elements found in iron oxide? OPTIONS:
- I and O
- Ir and O
- Fe and O
- Pb and O
A:
Fe and O