Answer the questions below in your science notebook 1. Which statement is true of all matter? A. It has mass. B. It can be seen. C. It exists only as a solid. D. It maintains its shape and size. 2. A metal coin has certain properties that can be measured. Which property of a coin is different on the moon than it is on Earth? A. density B. mass C. volume D. weight 3. Kareem organized different terms in a chart. He placed terms that are examples of matter in one column and terms that are not examples of matter in another column. Which term should Kareem place in the Not Matter column to complete this chart? A. air B. ice C. light D. paper Matter Not Matter Salt Electricity Copper Heat Water Motion wood ?

H – raise hand and wait for teacher response C – voice level 0 H – raise hand and wait for teacher response A – guided notes M – remain in seat P – independent SC.8.P.8.4 Classify and compare substances on the basis of characteristic physical properties that can be demonstrated or measured; for example, density, thermal or electrical conductivity, solubility, magnetic properties, melting and boiling points, and know that these properties are independent of the amount of the sample. SC.8.P.8.3 Explore and describe the densities of various materials through measurement of their masses and volumes. Objectives:  Identify that density is a ratio of mass to volume by measuring the mass and volumes of various materials and calculating density.  Manipulate the density equation in order to solve for density, mass and volume, when given the other two.  Defend the claim that the densities of substances will not change if the amount of the sample changes. Essential Questions How can density be used to reliably identify unknown substances?

What’s the Matter? What is matter? Matter is anything that has mass and takes up space. Your body is matter, but light and sound are not matter.

The Properties of Matter A property describes how an object looks, feels, or acts. The objects shown here have different kinds of properties:

Matter and its properties Properties are the specific characteristics that describe matter -Matter can be identified using its specific properties All matter has the general properties of mass, weight, volume, and density Other properties are physical or chemical –Physical: Does not change the identity of the matter – Chemical: Changes the matter in determining the property

What is mass? describes the amount of matter in an object. gram (g) common unit of mass. Objects of the same size can be made up of different amounts of matter.

How does mass differ from weight? Weight is a measure of the gravitational force on an object. The greater the mass of an object, the greater the gravitational force on the object and the greater the weight will be. Mass stays the same for an object even when increased or decreased gravitational forces change the weight of the object.

How are mass and weight measured? A triple-beam balance can be used to determine mass. Weight is measured with a spring scale. The standard scientific unit for weight is the newton (N).

V.S.

Measuring Space How is the amount of space occupied by matter measured? Volume is the amount of space an object takes up, or occupies. A balloon and a bowling ball of the same size have the same volume but very different masses.

How can volume be determined? Volume can be determined by a formula if it has a well-defined shape. rectangular solids  volume = (length)(width)(height), or V = lwh.

How can volume be determined? Liquid volume is measured with a beaker or graduated cylinder in liters (L) or milliliters (mL). Displacement of water in a graduated cylinder can be used to find the volume of irregular-shaped solid objects. Video

Which item is more dense?

Packing It In! What is density? Density is a measure of the amount of matter in a given volume. The density of a substance remains the same no matter how much of the substance you have.

How is density determined? Density is mass divided by volume, or D = m/V. Common units for expressing density are grams per cubic centimeter, or g/cm3. In water, which has a density of 1 g/mL, objects with density greater than 1 g/mL sink. Objects with density less than 1 g/mL float.

How can density be used to reliably identify unknown substances? Densities of substances will not change if the amount of the sample changes 20 mL 100 mL How can density be used to reliably identify unknown substances?

Turn and Talk How can substances with similar masses have different densities? 2. If you have a gold ring and a larger gold necklace, how would the densities of the two objects compare to one another?

Time To Transition… Station 1 – “Density” Lab C – level 2(only your partners should hear you) H – raise hand and wait for teacher A – station activity M – remain at station P – all partners should actively participate Station 1 – “Density” Lab Station 2 – “How Dense?” PENDA Station 3 – “Cold As Ice” Or “The Car that Runs on Chocolate” ACHIEVE 3000

A Bellringer Which statement is true of all matter? A. It has mass. B. It can be seen. C. It exists only as a solid. D. It maintains its shape and size. A

Bellringer 2. A metal coin has certain properties that can be measured. Which property of a coin is different on the moon than it is on Earth? A. density B. mass C. volume D. weight D

Bellringer 3. Kareem organized different terms in a chart. He placed terms that are examples of matter in one column and terms that are not examples of matter in another column. Which term should Kareem place in the Not Matter column to complete this chart? A. air B. ice C. light D. paper Matter Not Matter Salt Electricity Copper Heat Water Motion wood ? C