Temperature Measurement in Experiments

In this lesson, Group C will measure the temperature increase caused by exposing steel wool cleaned in vinegar to oxygen. Students will set up a digital thermometer, measure the starting temperature, prepare the steel wool, and conduct the experiment by recording temperature changes every 30 seconds for five minutes.

What is the main objective of Group C's experiment?

• To measure the weight of steel wool

• To test the acidity of vinegar

• To observe the color change in steel wool

• To measure the temperature increase of steel wool exposed to oxygen

What should students ensure about the digital thermometer before using it?

• It is reading in degrees Fahrenheit

• It is turned off

• It is reading in degrees Celsius

• It is calibrated to zero

Why is it important to set the depth of the thermometer in the Styrofoam cup?

• To prevent it from touching the bottom or sides of the cup

• To ensure it measures the air temperature

• To make it easier to read

• To keep it from falling over

How long should the temperature probe be placed in the steel wool and vinegar mixture?

• 1 minute

• 30 seconds

• 20 seconds

• 10 seconds

What is the starting temperature recorded for the steel wool and vinegar mixture?

• 21.5°C

• 18.5°C

• 20.5°C

• 19.5°C

What should be placed on the scale before weighing the steel wool?

• A metal tray

• A plastic spoon

• A piece of paper towel

• A glass plate

What is the approximate weight of the steel wool after removing it from the vinegar?

• 6.27 g

• 8.27 g

• 7.27 g

• 5.27 g

What is the purpose of stretching out the steel wool before placing it around the thermometer?

• To increase its weight

• To remove excess vinegar

• To make it fit in the cup

• To ensure even exposure to oxygen

How often should students record the temperature changes during the experiment?

• Every 10 seconds

• Every 20 seconds

• Every minute

• Every 30 seconds

What is the temperature reading after 30 seconds of starting the timing?

• 29.1°C

• 28.1°C

• 31.1°C

• 30.1°C