Metric Basics - Lab activity 2011/2012 Group Members and their job title:

Transcription

1 Metric Basics - Lab activity 2011/2012 Group Members and their job title: Objectives: Students will Use specific lab equipment to make measurements Measure items unit metric units 3. Attention group leader- Instruct all members of your group that accuracy counts and include units on all of your measurements and to include units on measurements. A. LENGTH (What is the metric unit used to measure length? ) 1. Draw a line that is 7 mm long. Start your line here a. What is the meaning of the prefix milli? b. How many millimeters in a meter? 2. Draw a line that is 7 cm long. Start your line here a. What is the meaning of the prefix centi? b. How many centimeters in a meter 3. a. Which line is longer the 7cm line or the 7mm line? b. How many times longer is the 7cm line compared to the 7mm line? 4. Estimate the following lengths in metric units and then measure them to determine their actual lengths. The letters in parenthesis indicate the units you must record your answer in. Estimate Measurement Estimate Measurement Desk Height (m) Shoe size (cm) Length of ruler (mm) Head circumference (cm) Your height (m) Trash can height(cm)

2 B. MASS (What is the metric unit used to measure mass? ) Estimate the following masses in metric units and then measure them to determine their true masses: Estimate Measurement using scale Estimate Measurement using scale 4. penny (g) 7. Lg paperclip (g) 5. Nickle (g) 8. single serving of Cheerios (g) 6. toy animal (g) 9. Golf ball (g) C. VOLUME (What is the metric unit used to measure volume? ) Container Estimate volume (ml) Measured volume (ml) Water bottle Starbucks Tall Starbuck Grande Starbucks Venti 1. When measuring liquids in a graduated cylinder, what part of the column of water is used as the point of measurement? 2. Count the number of drops it takes to raise the water level in a graduated cylinder from 5mL to 6mL. 3. Measure the mass of a 100mL beaker and record in the data table below. Fill the beaker with 50mL of water and measure the mass and record in the data table below. Calculate the mass of the 50mL of water that you measured in the beaker and record in the data table. Mass of 100mL Beaker Mass of 100mL Beaker with 50mL of water Mass of 50mL of water

3 4. Measure the mass of a 100mL graduated cylinder and record in the data table below. Fill the graduated cylinder with 50mL of water and measure the mass and record in the data table below. Calculate the mass of the 50mL of water that you measured in the graduated cylinder and record in the data table. Mass of 100mL Graduated Cylinder Mass of 100mL Graduated Cylinder with 50mL of water Mass of 50mL of water 5. Which piece of equipment is more accurate in measuring the 50mL of liquid, use the Check this out clue below? Explain why you selected the piece of lab equipment you did. Check this out 1mL of water is equal to exactly 1g of water pretty cool, huh? D. TEMPERATURE (What is the metric unit used to measure temperature? ) Examine the thermometer of each container and record the temperature in the data table below Container A- Hot plate 2 Temperature B- Hot plate 7 C- Room temp water D- Ice water

4 Use the thermometer to measure the temperature of the following Air temp in room Air temp outside in shade Air temp outside in sun Soil temp outside at soil surface Soil temp outside 4cm below soil surface Soil temp outside 8cm below soil surface Arm pit temp at rest Arm pit temp after running in place for 1min Skin temp at surface of arm 1. What was the difference in temperature in the armpit at rest compared to the armpit after 1 minute of exercise? What might be the cause or source of the temperature difference? 2. Create a bar graph comparing the temp difference at the 3 different soil locations, temperature vs soil depth. Remember A bar graph is used to display data in a number of separate or distinct categories. They must have: x (horizontal) and y (vertical) axis labeled clearly. Proper units labeled (meters, liters, etc.). a title. bars colored or patterned. bars labeled.

5 3. How might your knowledge of temperature vs soil depth be used in possible construction of a house and reduction of energy costs, ie electric bill? METRIC REVIEW 1. Fill in the table for the following metric measurements: Measurement Metric unit Lab equipment used to make measurement Mass Length Volume Temperature 2. Write the metric prefix for the following numbers. 1/1,000,000,000 = 1/1,000,000= 1/1000=, 1/100= 1/10= 1000=, 10=.