Key Terms
This relates the mass of a material in a given volume
Density
The ability to do work or cause change
Energy
What is the difference between a physical and chemical change?
Chemical changes make new substances while physical changes do not.
Calculate the density of a cube that has a mass of 20.25g and a volume of 3cm3
6.75 g/cm3
What will happen to a block of wood that is 3.3 g/cm3 when you throw it into water?
It will sink to the bottom
The amount of space that matter occupies
Volume
The measure of the average energy of random motion of particles of matter
Temperature
You stretch a rubber band with your hands. Is this a form of potential or kinetic energy? Why?
A cube has a mass of 174.4g and a volume of 32cm3, what is the density of the cube?
5.45 g/cm3
If you were on the moon, would your mass or weight change?
Your weight would change.
A change in which energy is taken in. For example, the melting of ice.
Endothermic Change
The total energy of all the particles in an object
Thermal Energy
Why or why not is the melting of ice and endothermic change?
The ice is taking in the energy for it to melt.
What is the density of a cube where all side measures 4cm and the mass is 464g?
7.25 g/cm3
The ability to dissolve in water is what kind of change?
Chemical Change
The internal energy stored in the chemical bonds between atoms.
Chemical Energy
This certain type of change of matter releases energy. For example, combustion.
Exothermic Change
State the law of conservation of mass.
Matter is neither created nor destroyed.
If all the sides of a cube measure 5cm and the mass of the cube is measured to be 952.5, what is the density of the cube?
7.62 g/cm3
Chemical Energy is the potential energy of what?
Bonds between atoms.
A form of energy that travels through space as waves.
Electromagnetic Energy
An object where electricity enters or leaves
Electrode
Describe the movement of particles in cold air and in hot air.
Cold=Slow Hot=Fast
Determine the density of a cube that has a mass of 600g and the sides measure 3cm x 4cm x 5cm
10 g/cm3
New substances are always formed when what happens?
A chemical change