Some health care professionals recommend that children use insect repellent before going outside. Using insect repellent is a good way to keep the insects from OPTIONS:
- reproducing.
- laying eggs.
- spreading disease.
- dying.
A: spreading disease.

The skin is the largest organ in the human body. Why is skin considered to be an organ? OPTIONS:
- It is made of cells.
- It acts as a barrier.
- It is made of tissues.
- It is part of an organism.
A: It is made of tissues.

A bus traveled 280 kilometers between two cities. It left the first city at 3:00 p.m. and arrived at the second city at 7:00 p.m. What was the average speed of the bus during the trip? OPTIONS:
- 4 km/h
- 40 km/h
- 70 km/h
- 280 km/h
A: 70 km/h

Which element makes up most of the air we breathe. OPTIONS:
- carbon
- nitrogen
- oxygen
- argon
A:
nitrogen