question:
Which of the following describes an object that must have a net negative charge?
OPTIONS:
- It contains more molecules than atoms.
- It contains more electrons than protons.
- It is carrying an electric current.
- It is made of metal.

answer:
It contains more electrons than protons.

question:
Scurvy is a disease that sailors often got on long voyages. It was discovered that scurvy could be prevented by eating oranges and lemons. This suggests that scurvy is a disease caused by
OPTIONS:
- exposure to sea air
- a nutritional deficiency
- a microorganism
- lack of exercise

answer:
a nutritional deficiency

question:
Which of the following is an example of an assistive device?
OPTIONS:
- contact lens
- motorcycle
- raincoat
- coffee pot

answer:
contact lens

question:
Why is a healthy diet important?
OPTIONS:
- It maintains a constant body temperature.
- It prevents damage to internal organs.
- It makes oxygen for all the cells in the body.
- It supplies the body's needs for growth and energy.

answer:
It supplies the body's needs for growth and energy.