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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.
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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).
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Human senses have their limits and can be inaccurate.
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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).
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New terminology: measurement unit Time Length Mass Weight Density
Volume Temperature Scientific notation Percent deviation
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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).
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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.
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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).
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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).
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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.
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Length The distance between two points
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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).
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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).
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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).
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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).
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Weight The amount of gravitational force on an object; dependent on an object’s mass and distance away from the center of earth.
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Pressure The amount of force or weight in a given area.
Unit – newtons/m² or lb/in²
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What does this instrument measure?
Time!
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time is measured in: Seconds Minutes Hours Days Weeks Months Years
centuries
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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).
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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).
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Volume The amount of space an object takes up
Unit – cm³ (for solids) or mL (for liquids) {note: 1cm³ = 1mL}
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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).
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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
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