THE METRIC SYSTEM A Global System of Measurement

Introduction Definition- A system of measurement units used all over the world. Definition- A system of measurement units used all over the world. Same “Language” Same “Language” Measure anything Measure anything Base 10 system Base 10 system Base units Base units Move decimal left or right to convert between units. Move decimal left or right to convert between units. Prefixes change the units by a factor of 10. Prefixes change the units by a factor of 10.

Length DEFINITION: measurement of distance from one point to another DEFINITION: measurement of distance from one point to another Unit- Meter (m) Unit- Meter (m) Equipment- meter stick and metric ruler Equipment- meter stick and metric ruler

Length Tips Make sure you start at the 0 mark, NOT at the end of the metric ruler or meter stick. Read the meter stick by counting the large, numbered tick marks as centimeters and by reading the small, unnumbered marks as millimeters.

Length Equivalents

Length Estimates Pinkie Step

Mass/Weight DEFINITION: DEFINITION: Mass- a measurement of the amount of matter that makes up and object Mass- a measurement of the amount of matter that makes up and object Weight- a measurement of the effect of gravity on an object Weight- a measurement of the effect of gravity on an object Unit- gram (g) Unit- gram (g) Equipment- triple beam balance, spring scale Equipment- triple beam balance, spring scale

Mass/Weight Measurements

Direct measurement- for solid objects: Direct measurement- for solid objects: Indirect Measurement- for liquid objects: Indirect Measurement- for liquid objects: Tips- Tips- Make sure your balance is zeroed out before beginning to measure by turning the knob. Make sure your balance is zeroed out before beginning to measure by turning the knob. Get down at eye level to read the balance. Get down at eye level to read the balance.

Mass/Weight Equivalents

Mass/Weight Estimates Dollar Bill Pineapple

Volume DEFINITION: the amount of space an object takes up DEFINITION: the amount of space an object takes up Unit- liter (L), cubic centimeter (***1 mL = 1 cm 3 ***) Unit- liter (L), cubic centimeter (***1 mL = 1 cm 3 ***) Equipment- graduated cylinder, beaker, micropipettes Equipment- graduated cylinder, beaker, micropipettes Measurements Measurements Direct: When measuring Volume of a liquid. Direct: When measuring Volume of a liquid. Place the liquid into the graduated cylinder. Place the liquid into the graduated cylinder. Tips: Tips: Get down at eye level to read the graduated cylinder Get down at eye level to read the graduated cylinder Read the cylinder at the bottom of the meniscus. Read the cylinder at the bottom of the meniscus.

Volume Measurements The volume of this liquid is 66mL

Water Displacement Water Displacement-When measuring the volume of a solid object: Get a beaker with water that the object can be fully submerged in. Record the water level in the beaker before the object is in the water. Then, place the object in the water. Record the new height of the water in the beaker Take the new height of water and subtract the original height of the water from it The answer is the volume of the object

Volume Equivalents

Volume Estimates Mentos Coke

Time DEFINITION: a measure of change DEFINITION: a measure of change Unit: second (s) Unit: second (s) Equipment: stopwatch, clock Equipment: stopwatch, clock Equivalents: Equivalents:

Temperature DEFINITION: A measure of the average amount of heat contained in an object DEFINITION: A measure of the average amount of heat contained in an object Unit: Celsius (C) Unit: Celsius (C) Equipment: thermometer Equipment: thermometer Standard Equivalents: Standard Equivalents:

Temperature Estimates Room Temperature= 68  F = 20  C Room Temperature= 68  F = 20  C Water Freezes At: 32  F = 0  C Water Freezes At: 32  F = 0  C Water Boils At: 212  F = 100  C Water Boils At: 212  F = 100  C

Density DEFINITION: the amount of matter in a given amount of space. DEFINITION: the amount of matter in a given amount of space. Unit: Grams per milliliter (g/mL) and Grams per Centimeter cubed (g/cm 3 ) Unit: Grams per milliliter (g/mL) and Grams per Centimeter cubed (g/cm 3 ) Equipment: No direct measurement can be measured, must be calculated. Equipment: No direct measurement can be measured, must be calculated.

Density Estimates Pillow Brick

Speed DEFINITION: the change in position over time. Unit: meters per second (m/s), kilometers per hour (km/hr) Unit: meters per second (m/s), kilometers per hour (km/hr) Estimate: 1.3 m/s= normal walking pace; 62 mi/hr= 100 km/her Estimate: 1.3 m/s= normal walking pace; 62 mi/hr= 100 km/her Equipment: No direct measurement can be measured, must be calculated. Equipment: No direct measurement can be measured, must be calculated. Equivalents Equivalents