Laboratory Techniques and Measurements.

Laboratory Techniques and Measurements

Hands-On Labs, Inc.

Version 42-0165-00-02

Exercise 1: Length, Temperature, and Mass

Observations:

When measuring the key, DVD, spoon and fork I measured for the length in centimeters and I was able to convert into millimeter and meter from it. For the DVD I measured from the furthest outer distances. With the spoon and fork, I measured from the tip to tip. I repeated this step for the key as well. Temperature readings were fun. I measured the cold tap water first and simply turned the sink on and measured that temperature at that point. I then adjusted handle to warm water up and I let the water run until it did. Meanwhile, I placed water in a beaker for heating up and placed ice in the other beaker I just used for cold tap water. I measured it instantly at this point. A minute had passed and I measured the water in the iced beaker. I then set a timer for four additional minutes for the five minute later reading. Water just boiled at this point so I read the temperature soon as it reached this condition after I set a separate four minute timer for this test. As timers went off I took readings of final two tests. For mass I collected all items including a quarter, dime, penny, pencil and key. I calibrated scale until it had grams as the measurement and an accurate reading of zero on the scale. Once done I measured the quarter and took down weight. I tared the scale and zeroed the weight on the scale once again and proceeded to the next item. I repeated steps for all to get to my final answers.

Data Table 1. Length Measurements.

Object Length (cm) Length (mm) Length (m)

CD or DVD 12cm 120mm 0.12m

Key 5.5cm 55mm 0.055m