Science Warm Up 8/21/18 What is the volume of a rectangular solid that is 40 centimeters long, 10 centimeters wide, and 5 centimeters high? A. 400 cm3.

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Presentation transcript:

Science Warm Up 8/21/18 What is the volume of a rectangular solid that is 40 centimeters long, 10 centimeters wide, and 5 centimeters high? A. 400 cm3 B. 500 cm3 C. 1,000 cm3 D. 2,000 cm3

This makes me think of…. I wonder…. I have some questions…. Take a look at the picture below and complete the following sentences with your own responses in your science notebook. This makes me think of…. I wonder…. I have some questions…. This makes me want to….

Physical and Chemical Changes of Matter

Matter is anything that takes up space and has mass. The Nature of Matter Matter is anything that takes up space and has mass. What is matter? Examples of Matter: You can observe matter easily with your senses . . . rocks, trees, bicycles, air . . . Basically everything and anything! The only thing that wouldn’t be matter would be energy (sunlight, heat, electricity). - no mass or volume so they can’t be matter!

Physical Properties Physical property is a property that can be easily observed without changing the identity of the substance. Examples: viscosity conductivity malleability hardness magnetism melting point boiling point density color

Examples of Physical Properties A. Solubility of a substance is its ability to dissolve. Example: sugar in water B. Conductivity is a material’s ability to allow heat or electricity to flow. Examples: metal = high conductivity wood = poor conductivity

Examples of Physical Properties C. Malleability of a substance is its ability to be hammered into a thin sheet D. Melting and Freezing points are the temperatures at which a solid becomes a liquid and a liquid becomes a solid. E. Density of a substance is a measure of how close together its particles are. Low density = float High density = sink

Physical Change It is a physical change if . . . A change in the appearance, without changing the identity of the material. Can be reversible, or irreversible Substance may seem different, but the way the atoms link up is the same. It is a physical change if . . . It changes shape or size It dissolves. Or the substance changes phase.

Chemical Properties Chemical property is any ability to produce a change in the identity of matter. Examples of chemical properties . . . reactivity flammability Corrosive: Eating away, such as a metal by acid Material’s ability to burn in the presence of oxygen. How readily a substance combines chemically with other substances.

Chemical Changes Chemical changes occur when a substance reacts and forms one or more new substances. You know a chemical change has occurred when there is. . . A change in color or odor. Production of a gas (bubbling). Formation of a precipitate (solid). Absorb or release energy (gets hot or cold or light is given off).

Examples of Chemical Changes: Burning Or Combustion: Color change, odor change, Produces a gas, gets hot Rusting: Color change Corroding: Color change Digesting: Color change, odor Change, produces a Gas, releases energy Molding: Color change Decaying: Color change

What kind of change is it?

What kind of change is it? B

What kind of change is it?

What kind of change is it?

What kind of change is it?

What kind of change is it?

Physical Chemical A C D F B E

Create a frayer model using physical change

Science Closure 8/21/18 Marco tears a piece of notebook paper into smaller pieces, as shown below. Tearing paper into pieces is an example of what kind of change? A. a change in mass B. a physical change C. a chemical change D. a change in energy