Show:
Physical States
Mixtures
Material Properties
Density
Forces and Energy
100
  • What are the three main states of matter?

Solid, Liquid, Gas

100
  • What is a mixture?

A mixture is a combination of two or more substances that are not chemically combinded.

100
  • What is the definition of a physical property?

A physical property can be observed without changing the substance. 

100
  • 100: What is density?

Density is the mass per unit volume of a substance.

100
  • What is a force?

 A force is a push or pull on an object.

200
  • What happens to the molecules in a solid when it is heated?

The molecules move faster and spread apart

200

What is the difference between a homogeneous mixture and a heterogeneous mixture?

A homogeneous mixture has a uniform composition, while a heterogeneous mixture does not. 

200
  • 200: Give an example of a chemical property.

Flammability, reactivity with an acid, bubble formation, rusting (oxidation)

200
  • 200:What is the density of water?

1.0 g/ml

200
  • 200: What is the difference between potential energy and kinetic energy?

Potential energy is stored energy; kinetic energy is energy in motion.

300

Describe what happens to water when it freezes.

Water turns into ice.

300

Can you name an example of a mixture that can be separated by physical means?

Salad, Sand and Iron filings, M&M's, fruit salad

300
  • 300: How can you determine if a material is magnetic?

If a material is attracted to a magnet, it is magnetic.

300
  • 300: If an object has a density of .56g/ml will this item float in water? Will this item float in gasoline with a density of .66g/ml.

Yes, it will float in water and it will float in gasoline.

300
  • 300: Give an example of an object with potential energy.

A book on the edge of a shelf, a stretched rubber band, the roller coaster car at the top of the hill.

400
  • What state of matter has a definite shape and volume?

Solid

400
  • 400: What is a solution?

A solution is a homogeneous mixture where one substance is dissolved in another. 

400
  • 400: What is the boiling point of water at sea level?

100 degrees Celsius

400
  • 400: Why do some objects float while others sink?

Objects with a density less than that of the fluid they are being put into, will float in that fluid. If their density is greater than the fluid they are being placed into, they will sink in that fluid. 

400
  • 400: How does gravity affect objects on Earth?

Gravity pulls objects towards the center of the Earth, affecting their weight and motion.

500
  • How does the energy of particles change from a gas to a liquid?

The energy decreases as particles get closer together.

500

What type of mixture is a salad: homogeneous or heterogeneous?

Heterogeneous

500


  • If you can pound a metal into a sheet and stretched into wires, those two process are called? 

Malleability and ductility

500
  • 500: How is density related to temperature?

As temperature increases, density usually decreases.

500
  • 500: Explain how energy can be transformed from one form to another.

Gravitational Potential Energy can be converted to kinetic energy when an object falls.