Physical Science
Energy
Reactions
Atoms & elements
Energy part 2
100
a change in the size, shape, form, or state of matter that does not change the identity of the matter.
What is a physical change?
100
a change in matter in which the substance that makes up the matter change into other substances.
chemical change
100
Which reaction can be reversed? Physical or Chemical
What is a Physical reaction?
100
a positively charged particle in the nucleus of an atom.
proton
100
Type of motion that this graph indicates
Constant motion (speed)
200
The temperature at which an element or compound changes from solid to liquid.
What is the melting Point?
200
When heat moves from two things at different temperatures and must b
e touching
What is conduction?
200
A chemical reaction where heat is absorbed and the surrounding temperature falls
What is endothermic?
200
Number of protons, neutrons and electrons in Potassium
19 - protons
19 - electrons
20 - neutrons
200
Point where KE is highest and lowest
Kinetic Energy highest - Point X
Kinetic Energy lowest - Point W
300
Mass per unit volume of an object as compared to pure water.
What is Density?
300
Heat transfer of energy that comes from the sun
What is Radiation?
300
What is an example of a chemical change?
change in color, produces gas and heat
300
Identify the element from this Bohr model
Calcium
300
This type of substance speeds up a chemical reaction without itself being altered.
What is a catalyst?
400
This happens to particles as energy is removed.
Kinetic energy decreases and particles move closer together (volume decreases and density increases)
400
Energy stored in the nucleus of an atom.
What is nuclear energy?
400
When two reactants form a single product.
What is a synthesis reaction?
400
Between the following elements, this one is a poor conductor of heat.
F - K - Fe - Ag
F - Fluorine?
400
Point with highest and lowest potential energy
PE highest at W
PE lowest at X
500
The density of object with a mass of 0.040kg and a volume of 20mL in g/cm3.
What is 2g/cm3.
0.040kg -> 40 g
20mL -> 20cm3
500
A student charges their cellphone. Shortly after the student receives a phone call. Name the energy transformations involved (4).
What is electrical current to potential chemical to electromagnetic to sound.
500
This is how you would correctly balance the following equation. This is the type of chemical reaction.
Al2O3 +NaCl -> AlCl3 + Na2O
What is
Al2O3 + 6NaCl > 2AlCl3 + 3Na2O?
What is a double replacement reaction?
500
Energy movement involving the transfer of electrons
What is ionic bonding?
500
Motion happening between 5:00 and 5:30
At rest