Show:
Classifying Matter
Matter and Energy
Properties of Matter
Density Math Probs.
Chemical and Physical Changes
100
Anything that has Mass and Volume
What is Matter?
100
Gas, Liquid and Solid.
What are the three states of matter?
100
Something that describes matter.
What is a property?
100
Piece of wood has a mass of 25 grams and a volume of 5 cm. What is the density?
Density = 5 g/cm.^3
100
The starting materials in a chemical reaction.
What is a reactant?
200
What are two types of matter?
Pure substances and Mixtures
200
What is a phase change?
Going from solid to liquid and back down.
200
Name an example of a physical property and a chemical property.
Physical properties- Viscosity, Conductivity, Malleability, Hardness, Shape, Color, Odor, Texture, Boiling point, Melting point, Strength, Hardness, Ability to conduct electricity, Magnetism, or heat, density. Chemical properties- Flammability, Heat of combustion, Toxicity, Ph, Ability to oxidize, Radioactivity, Reactivity with water, rusting.
200
A dynamite has a volume of 50 cm. and a mass of 100 grams. What is its density?
Density = 2 g/cm.^3
200
What is the difference between a reactant and a product?
A reactant is the starting material of a chemical reaction and a product are substances produced by a chemical reaction.
300
Solution, Suspension, and Colloid.
What are the three classifications of mixtures?
300
What are the three types of movement that the three states of matter (gas, liquid and solid) move?
Gas- move very fast and spread indefinitely Liquid- moves more freely Solid- very rigid with very little movement
300
What is the difference between chemical and physical properties?
Chemical property- Describes the way it reacts when it changes. Physical property- Characteristics that are observed without changing the substance. Conclusion: One changes the substance(physical), and the other one is the way it reacts when changed.
300
The Hello Kitty doll has a density of 4 g/cm^3, and a mass of 16 grams. What is its volume?
Volume = 4 cm.^3
300
What is the difference between chemical and physical change?
Physical change- when a substance's appearance changes but the atoms are not changed. Chemical change- when a substance changes into one or more NEW substances.
400
What are the four different types of mixtures?
Homogeneous, Immiscible, Heterogenous, and Miscible.
400
What are two similarities between the Law of Conservation of Mass and the Law of Conservation of Energy?
They both can't be created nor destroyed and after a chemical/physical change the mass and energy is always the same.
400
What's the difference of Conductivity and Viscosity?
Conductivity is the ability to allow HEAT to flow and Viscosity is the tendency of a LIQUID to resist flowing
400
A computer has a mass of of 144 grams and a volume of 12 cm. What is its density?
Density = 12 g/cm^3
400
Name two signs of a physical change and chemical change.
Chemical- Color change, Odor change, Release of heat, Gas is created, Formation of precipitate. Physical- Shape change, Color changed by someone, Texture change, Dissolving, Phase changes.
500
What is the difference between elements, compounds and molecules?
Element- a substance that can not be broken further down. Compound- made up of two or more elements. Molecule- a substance made up of different elements and/or compounds.
500
Name six of the phase changes.
Melting, evaporation/boiling, deposition, sublimation, condensation and freezing.
500
What is density and what happens when its in low density and high density?
Density- Mass per unit volume of substance. In LOW density, the substance is said to be LIGHT. In HIGH density, the substance is HEAVY.
500
The drum set has a mass of 120 grams and a volume of 6 cm. What is its density?
Density = 20 g/cm/^3
500
Give three examples of a physical and chemical change.
Physical change- Cutting grass, Hammering steel to flat sheet, Grinding peanuts to peanut butter, dissolving salt in water, Ice cubes melting. Chemical change- Rusting, Leaves changing color in Fall, Baking bread, Digesting food.