Notes – Measurement (8 th grade). International System of Units a way of measuring based on multiples of ten (10, 100, 1000…) abbreviated S.I. also called.

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Presentation transcript:

Notes – Measurement (8 th grade)

International System of Units a way of measuring based on multiples of ten (10, 100, 1000…) abbreviated S.I. also called the metric system most of the world uses it

Length the distance between two points the basic unit: meter tool used: ruler or meterstick NO! YES!

Length

Know what each line represents!

Length 1. Length = ______ _____

Length 2. Length = ______ _____

Length 3. Length = ______ _____

Length 4. Length = ______ _____

Length 1. Length = ______ _____ 1.9 cm

Length 2. Length = ______ _____ 4.3 cm

Length 3. Length = ______ _____ 16 cm

Length 4. Length = ______ _____5.8 cm

Volume the amount of space an object takes up the basic unit: depends if it’s solid or liquid tool used: depends if it’s solid or liquid

Liquid Volume the basic unit: liter tool used: graduated cylinder

Liquid Volume liquids curve inside a narrow container a meniscus is the convex or concave surface of a column of liquid How do you measure? or

Liquid Volume 1.Figure out the scale being used by interpreting what each unlabeled line is ? NOPE!

Liquid Volume 1.Figure out the scale being used by interpreting what each unlabeled line is YEP!

Liquid Volume 2. Line your eye up with the water line.

Liquid Volume 3. Pick the line closest to the bottom of the curve.

Liquid Volume Which line? or Volume = ___________ 6.6 mL

Solid Volume the basic unit: cubic meter tool used: ruler or meterstick

Solid Volume area = length x width the unit is squared 6 square meters 6 m 2 meters

Solid Volume volume = length x width x height the unit is cubed What is the volume? 4 cm x 3 cm x 2 cm 24 cm 3

Mass the amount of matter in an object the basic unit: gram tool used: triple beam balance or electronic balance

Triple-Beam Balance Use: 1.Move sliders until it balances. 2.Add together the numbers on all 3 sliders. Mass

100 g 60 g g g What is the mass?

To find the mass of ONLY the sand: 1.Find the mass of the empty cup. 2.Find the mass of the sand and the cup. 3.Subtract. Mass

167.5 g - 45 g g If the mass of the cup is 45 g, what is the mass of only the sand?

Mass to find the mass of ONLY the sand: 1.Place the EMPTY beaker on the balance. 2.Press the “tare” or “zero” button to get the mass to zero. 3.Fill the container with what you want to weigh, and record the mass.

Temperature the measure of the average energy of the motion of particles in a substance the basic unit: º Celsius tool used: thermometer water freezes at 0ºC and boils at 100ºC. put a minus sign (-) if it’s below zero

Temperature SCALE each line is __ degree(s) SCALE each line is __ degree(s) SCALE each line is __ degree(s) 1 12

Distance in Space astronomical unit - the average distance from Earth to the sun (about 150 million km) Use astronomcal units (AU) to measure distances within our solar system (planet to planet)

Distance in Space light-year - the distance light travels in one year (about 10 trillion km) Use light-years to measure distances outside our solar system (galaxy to galaxy, star to star)

Summarize UnitLab Tool Length Liquid Volume Solid Volume Mass Temperature meter (m) ruler or meterstick liter (L) graduated cylinder cubic meter (m 3 )ruler gram (g) triple beam balance or electronic balance °Celsius (°C)thermometer