name the five ways humans get information about the world around them. L.O: students will be able to explain the importance of accurate measurements in science (S2a, S4a). Do now:) name the five ways humans get information about the world around them.

Humans use their 5 senses to make observations about the world How do humans get information about the world around them? Humans use their 5 senses to make observations about the world Are the five senses the only way we can learn about the world around us? L.O: students will be able to explain the importance of accurate measurements in science (S2a, S4a).

Human senses have their limits and can be inaccurate.

humans use instruments to make more accurate observations than our senses can! L.O: students will be able to explain the importance of accurate measurements in science (S2a, S4a).

New terminology: measurement unit Time Length Mass Weight Density Volume Temperature Scientific notation Percent deviation

measure: to make an observation using numbers. What does “measure” mean? measure: to make an observation using numbers. L.O: students will be able to explain the importance of accurate measurements in science (S2a, S4a).

When you measure something it describes an observation using numbers and units. ALL measurements contain at least one of the following: Time, length, or mass.

Scientists use instruments, measurements & numbers because they are accurate. L.O: students will be able to explain the importance of accurate measurements in science (S2a, S4a).

All scientists in the world use Le Systeme International d’Unites also known as internationa system of units to make measurements. L.O: students will be able to explain the importance of accurate measurements in science (S2a, S4a).

the SI system is based on the metric system and used metric prefixes. Kilo = 1000, so 1 kilometer is 1000 meters. Kilogram is 1000 grams. Centi= 1/100, so 1 centimeter is 1/100 of 1 meter. Milli= 1/1000, so 1 millimeter is 1/1000 of 1 meter.

Length The distance between two points

length is measured in: Meter (m) Centimeter (cm): 1/100 of 1 meter Millimeter (mm): 1/1000 of 1 meter Kilometer (km): 1000 meters L.O: students will be able to explain the importance of accurate measurements in science (S2a, S4a).

TNT: which person has more “mass”? How do you know? L.O: students will be able to explain the importance of accurate measurements in science (S2a, S4a).

mass: The amount of matter an object is made up of. Measured with a triple-beam balance . L.O: students will be able to explain the importance of accurate measurements in science (S2a, S4a).

mass is measured in: Grams (gm) Kilograms: 1000 grams Milligrams: 1/1000 grams Micrograms: 1/1,000,000 grams. L.O: students will be able to explain the importance of accurate measurements in science (S2a, S4a).

Weight The amount of gravitational force on an object; dependent on an object’s mass and distance away from the center of earth.

Pressure The amount of force or weight in a given area. Unit – newtons/m² or lb/in²

What does this instrument measure? Time!

time is measured in: Seconds Minutes Hours Days Weeks Months Years centuries

what is this mother doing? The measure of how hot or cold an object is L.O: students will be able to explain the importance of accurate measurements in science (S2a, S4a).

Temperature is measured using thermometers. Temperature is measured in: Celsius (C) Kelvin (K) Fahrenheit (F) L.O: students will be able to explain the importance of accurate measurements in science (S2a, S4a).

Volume The amount of space an object takes up Unit – cm³ (for solids) or mL (for liquids) {note: 1cm³ = 1mL}

Independent work: lab #2: measuring objects Read the directions. Work with partner. Complete the measurement lab. L.O: students will be able to explain the importance of accurate measurements in science (S2a, S4a).

Homework: you will write 7 paragraph essay titled: observations, measurements and instruments. Introduction: define what senses are, define what observation, instruments and measurement are. Length: define it. Name the instruments and the units used to measure it. Mass: define it. Name the instruments and the units used to measure it. Weight: define it. Name the instruments and the units used to measure it. Temperature:define it. Name the instruments and the units used to measure it. Time: define it. Name the instruments and the units used to measure it. conclusion