The particles in this state vibrate in place and are tightly packed together.
solid
100
The changing from a solid to a liquid.
Melting
100
What is the most appropriate unit to be used in measuring the mass of a horse?
kilogram
100
The melting point and boiling point of a substance is a _____________ property.
Physical
100
Melting candle wax is an example of a _______change.
physical
200
The particles in this state are attracted to each other, but they are able to slide past one another. Also, give an example of a substance in this state.
Liquid; water, vinegar, rubbing alcohol, etc.
200
The change from a liquid to a gas.
Evaporation / Boiling / Vaporization
200
What is the most appropriate unit to determine the volume of a baby's bottle?
Milliliter
200
What is the property that describes a substance's ability to burn? Is this a physical or chemical property?
Flammability; chemical
200
Burning paper is an example of a ____________ change.
chemical
300
The particles in this state are free to move independently. Give two examples.
Gas; oxygen, carbon dioxide, helium, nitrogen, air, etc.
300
Define an exothermic change. Define an endothermic change.
Exothermic change results in energy being removed and particles having less kinetic energy. An endothermic change results in energy being added to the particles and they move more rapidly (more kinetic energy).
300
Define Boyle's Law.
As pressure increases, volume decreases. (As pressure decreases, volume increases)
300
The ability is to be spread thin and create a wire without breaking is called ___________. This is a ________ property/
Ductility; physical
300
If something reacts with vinegar that is representing a ________ change.
chemical change.
400
The particles in this state are broken apart into ions and move very rapidly. List two natural examples that are found on Earth and one the is found in space.
Plasma, lightning, fire, sun, stars, etc.
400
Describe two examples of an exothermic change. Explain what state is being changed in to which new state.
freezing; liquid to solid---condensation; gas to liquid---deposition; gas to solid
400
Define Charles' Law.
As volume increases, temperature increases. (If temperature decreases, volume decreases.)
400
Density is a _________property. Calculate the density of a piece of copper that has a mass of 66 grams and a volume of 7.67 cubic centimeters.
physical; 8.6 g/cm3
400
Adding vegetable oil, water, rubbing alcohol, corn syrup, and dish soap together in a graduated cylinder is an example of a __________ change.
Physical - we changed their volume and observed the different densities. No new substance was produced.
500
Describe the shape and volume for solids, liquids, and gases.
Solids have a definite shape and volume. Liquids have a definite volume but an indefinite shape. Gases have an indefinite volume and shape.
500
Describe three examples of an endothermic change. Explain what state is being changed in to which new state.
Melting; solid to liquid----evaporation; liquid to gas----sublimation; solid to gas
500
Explain an example we observed in class of Boyle's Law and an example of Charles' Law.
(4th and 5th period)
Convert 24.3 mL of a gas to Liters.
Boyle's Law = marshmallow in a syringe; Charles' Law = balloon in liquid nitrogen; 0.0243 L
500
3rd & 6th period: How much water will a substance displace if it has a density of 0.65 g/cm3 and a mass of 16.25g?
4th & 5th period: How much water will a substance displace if it has a density of 2.75 g/cm3 and a mass of 0.88 kg?
3rd and 6th=25 mL ------- 4th and 5th=320 mL
500
Dry ice sublimes at room temperature. Physical or chemical?