Chapter 3 Preview Section 1 What Is Matter? Properties of Matter Preview Section 1 What Is Matter? Section 2 Physical Properties Section 3 Chemical Properties Concept Map

Chapter 3 Section 1 What Is Matter? Bellringer Look at the two similarly sized objects at the front of the room. One is cube-shaped and one is irregularly shaped. How could you determine the amount of space that each object occupies? How could you test this hypothesis? Write your answers in your Science Journal.

Chapter 3 What You Will Learn All matter has volume and mass. Section 1 What Is Matter? What You Will Learn All matter has volume and mass. Volume is the amount of space taken up by an object. Mass is a measure of the amount of matter in an object. Weight is a measure of the gravitational force exerted on an object.

Matter Chapter 3 Matter is anything that has mass and takes up space. Section 1 What Is Matter? Matter Matter is anything that has mass and takes up space. Matter can be described in terms of its volume, mass, and weight.

Chapter 3 Matter and Volume Section 1 What Is Matter? Matter and Volume The amount of space that an object occupies is known as volume. Volume is a measure of the size of a body or region in three-dimensional space. The liter (L) is the SI unit for volume.

Matter and Volume, continued Chapter 3 Section 1 What Is Matter? Matter and Volume, continued The meniscus is the curve at a liquid’s surface. For most liquids, volume should be measured from the lowest point of the meniscus. The volume of any solid object is expressed in cubic units.

Matter and Volume, continued Chapter 3 Section 1 What Is Matter? Matter and Volume, continued Cubic meters (m3) and cubic centimeters (cm3) are the units used for the volume of solid things. To find the volume of regularly shaped objects, use formulas. For example, to find the volume of a cube or another rectangular object, multiply the length times the width times the height.

Matter and Volume, continued Chapter 3 Section 1 What Is Matter? Matter and Volume, continued The process of pushing water out of the way is called displacement. To find the volume of an irregularly shaped solid object, use water displacement. The volume of water displaced by an object is equal to the object’s volume.

Measuring the Volume of Liquids Chapter 3 Properties of Matter Measuring the Volume of Liquids

Chapter 3 Matter and Mass Section 1 What Is Matter? Matter and Mass Mass is a measure of the amount of matter in an object. The terms mass and weight do not mean the same thing. Weight is a measure of the gravitational force on an object. An object’s weight can change depending on its location in the universe.

Matter and Mass, continued Chapter 3 Section 1 What Is Matter? Matter and Mass, continued The SI unit for mass is the kilogram (kg). Weight is expressed in newtons (N).

Chapter 3 Properties of Matter

Chapter 3 Section 2 Physical Properties Bellringer Read the definition of density on page 85 in your textbook. Find examples in the classroom of objects that have a small amount of matter in a given space, and objects that have a large amount of matter in a given space. Write your answers in your Science Journal.

Chapter 3 What You Will Learn Section 2 Physical Properties What You Will Learn Examples of physical properties are melting temperature, density, hardness, thermal conductivity, and electrical conductivity. Density is the amount of matter in a given space or volume. A physical change does not change the identity of the matter that undergoes the change. Melting, freezing, cutting, bending, and dissolving are physical changes.

Identifying Physical Properties Chapter 3 Section 2 Physical Properties Identifying Physical Properties A physical property of matter is a characteristic that can be observed or measured without changing the matter’s identity. Examples of physical properties are melting temperature, density, hardness, thermal conductivity, and electrical conductivity.

Identifying Physical Properties, continued Chapter 3 Section 2 Physical Properties Identifying Physical Properties, continued Density is the ratio of the mass of a substance to the volume of the substance. The units most often used for density are grams per cubic centimeter (g/cm3) for solids and grams per milliliter for liquids.

Identifying Physical Properties, continued Chapter 3 Section 2 Physical Properties Identifying Physical Properties, continued The density of a given substance remains the same no matter how much of the substance you have. Density can be used to identify substances because the density of a substance is constant at a given pressure and temperature.

Identifying Physical Properties, continued Chapter 3 Section 2 Physical Properties Identifying Physical Properties, continued Knowing the density of a substance can tell you if the substance will float or sink in water. If the density of an object is less than the density of water, the object will float. An object whose density is greater than the density of water will sink.

Chapter 3 Properties of Matter

Physical Changes: No New Substances Chapter 3 Section 2 Physical Properties Physical Changes: No New Substances A physical change is a change of matter from one form to another without a change in chemical properties. Physical changes include dissolving, cutting, bending, freezing, and melting. Physical changes do not change the identity of the matter.

Chapter 3 Bellringer Look at Figure 1 on page 90 in your textbook. Section 3 Chemical Properties Bellringer Look at Figure 1 on page 90 in your textbook. The rust shown in Figure 1 is formed when iron and oxygen interact chemically. What do you think the word “interact” means in this context? Write your answer in your Science Journal.

Chapter 3 What You Will Learn Section 3 Chemical Properties What You Will Learn Examples of chemical properties are reactivity and flammability. A chemical change is the process by which a substance changes into a new substance. Chemical changes usually liberate or absorb heat.

Identifying Chemical Properties Chapter 3 Section 3 Chemical Properties Identifying Chemical Properties A chemical property describes the ability of a substance to change into a new substance. Reactivity and flammability are chemical properties. Chemical properties are not as easy to observe as physical properties.

Comparing Physical and Chemical Properties Chapter 3 Properties of Matter Comparing Physical and Chemical Properties

Chemical Changes and New Substances Chapter 3 Section 3 Chemical Properties Chemical Changes and New Substances A chemical change is a change that occurs when one or more substances change into entirely new substances with different properties. Chemical changes and chemical properties are not the same. Chemical changes are processes by which substances change into new substances. Chemical properties describe which chemical changes can and cannot happen to that substance.

Chemical Changes and New Substances, continued Chapter 3 Section 3 Chemical Properties Chemical Changes and New Substances, continued The signs of a chemical change include a change in color or odor, fizzing and foaming, sound or light being given off, and changes in temperature. When matter undergoes a chemical change, its identity changes. So most chemical changes are irreversible.

Chapter 3 Properties of Matter

Physical Versus Chemical Changes Chapter 3 Section 3 Chemical Properties Physical Versus Chemical Changes Composition is the type of matter that makes up the object and the arrangement of the matter in the object. Physical changes do not change matter’s composition. Chemical changes do alter matter’s composition.

Physical Versus Chemical Changes, continued Chapter 3 Section 3 Chemical Properties Physical Versus Chemical Changes, continued Many physical changes are easily reversed. They do not change the composition of the substance. Most chemical changes are not easily reversed.

Comparing Physical and Chemical Changes Chapter 3 Properties of Matter Comparing Physical and Chemical Changes

Chapter 3 Properties of Matter Concept Map Use the terms below to complete the concept map on the next slide. weight milliliters mass cubic centimeters matter volume gravity

Chapter 3 Properties of Matter Concept Map

Chapter 3 Properties of Matter Concept Map