Length Length - the distance from end to end of an object

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Presentation transcript:

Length Length - the distance from end to end of an object Tools: Meter Stick , Metric Ruler Units: Meter (m), Centimeter (cm)

Mass vs. Weight Mass - the amount of matter in an object Matter - something that has mass and takes up space Weight - a measurement of the gravitational force acting on an object

Measuring Mass MASS vs. WEIGHT Tools: Triple Beam Balance Units: Mass is measured in grams (g) 1 paperclip = 1 g 1000 g = 1 kilogram (kg) MASS vs. WEIGHT -Always remains constant -Depends on gravity -Does not depend on gravity - Weight of an object changes if the gravity changes

Volume Volume: is the amount of space that matter takes up Volume can be in the form of a solid, liquid, or gas. There are three different types of volume: 1. Liquid Volume 2. Regular Volume 3. Irregular Volume

Volume of a Regular Solid Practice Problem Tools: Ruler or Meter Stick Units: Centimeters Cubed (cm3) 1 cm3 = 1 mL Volume = L x W x H 6 cm x 4 cm x 7 cm = 168 cm3

Liquid Volume Tool: Graduated Cylinder Units: milliliters (mL) liters (L) What is a meniscus? A meniscus is the curved surface of a liquid

Volume of an Irregularly Shaped Solid Tool: Graduated Cylinder Units: Milliliters (mL) Centimeters Cubed (cm3) Water Displaced Method Put a set quantity of water into the graduated cylinder and note the starting volume Place the irregularly shaped object into the graduated cylinder The water will rise - record the new volume The difference between the new and starting volumes is the volume of the irregular object

What is Density? Density is the amount of matter in a given space. Density is a physical property because it can be observed/measured without changing the object. Density can be used to identify substances because no two substances have the same density. Density does not depend on size or shape - the density of a single substance will remain the same no matter the sample’s size or shape.

Density Formula Density is the amount of mass in a given space (volume). The formula for density is... Mass Density = --------------- Volume Units for density… Solid = g/cm^3 Liquid = g/mL

m D v Density T-Triangle The Density T-Triangle can be used to write 3 different formulas. Formula for density: D = m/v Formula for mass: m = D x v Formula for volume: v = M/D m D v

The Density of Water is 1 g/mL Sink or Float The Density of Water is 1 g/mL An object/material will sink in water if it has a density greater than 1 g/mL. An object/material will float on water if has a density less than 1 g/mL. Practice Problem: Will a material with a mass of 110 g and a volume of 312 cm^3 float on or sink in water? Claim: Evidence: Reasoning: