Video – “Properties of Matter” – Questions ( will be graded )
1] Define matter
2] What are physical and chemical properties ( define )? Give two examples of each ( 4 total )
3] What are physical properties of an apple?
4] What would one chemical property of an apple be?
5] What eventually happens to a puddle of water ( if exposed to sunlight )? Is this a chemical or physical property?
6] What are some changes in physical properties for a lit firework?
7] How do scientists define solid matter?
8] How do scientists define liquid matter?
9] How do they define gaseous matter?
10] Does a gas have mass, weight, & occupy space? So what is a gas a member of?
11] What is an element ( define )?
12] Why does the bottom of a window pane appear thicker than the top?
13] What is a compound ( define )?
14] Why is table salt a compound?
15] What are the elements that make up the compound water?
16] What is a pure substance ( define )?
17] What is a mixture ( define )?
18] Define physical changes
19] What are the most common physical changes?
19] Define chemical changes
20] What are common types of chemical changes?
21] What is a molecule?

Video – “Properties of Matter” – Answers
1] Anything that has mass and takes up space
2] Physical – properties that can be observed without changing the identity of the substance ( color, mass, shape, density, melting temperature, boiling temperature )
Chemical – Describes how a substance changes into a new substance, by combining with other elements or by breaking apart into new substances ( flammability, reactivity )
3] Color, softness, density ( mass per volume )
4] Is it flammable? Does it react in your stomach?
5] Evaporates - physical
6] Mass, density, weight
7] definite shape and volume
8] definite volume but not definite shape ( assumes the shape of whatever container holds it )
9] no definite shape or volume
10] Yes – it is a part of matter
11] substance that cannot be separated or broken down into simpler substances by chemical means
12] scientists look at glass as a thick liquid so it eventually settles under gravity and appears thicker at the bottom
13] substance made up of atoms of two or more different elements joined by chemical bonds
14] Sodium and Chlorine are chemically combined in a one-to-one ratio always
15] Oxygen and Hydrogen
16] sample of mater, either a single element or a single compounds, that has definite chemical and physical properties
17] combination of two or more substances that are not chemically combined ( they are physically mixed )
18] Physical – change in form of matter without chemical properties being affected
19] cutting hair, crushing an aluminum can, boiling, melting
19] Chemical – change that results in a new substance, or altering the chemical identity of the original substance

20] burning or combustion, metal reacting with water to form rust
21] Group of atoms held together by chemical forces; the smallest unit of matter that can exist by itself and retain all of a substance’s chemical properties