Q: If a classroom experiment involves the use of several unidentified chemical solutions, which factor would be most important in maintaining safety during the experiment?

OPTIONS:
- The classroom would be fairly cold.
- The classroom would have poor lighting.
- The classroom would have good ventilation.
- The classroom would have carpet on the floors.
A: The classroom would have good ventilation.
Q: Drew was measuring the growth of a vine that can grow almost 31 cm a day. Which would be the best way to record his data of the growth over a period of a day?

OPTIONS:
- a bar graph
- a line graph
- a pie graph
- a picture graph
A: a line graph
Q: Wire was looped several times around an iron nail, and the wire's ends were connected to a battery. For which of these will this device most likely be used?

OPTIONS:
- to produce a heat source
- to demonstrate frictional forces
- to create a magnetic field
- to generate a sound wave
A: to create a magnetic field
Q: Jenny's class made an instrument to measure air pressure. The instrument is a

OPTIONS:
- thermometer.
- rain gauge.
- barometer.
- wind vane.
A:
barometer.