#1
Which of the following is an example of a chemical change?
Melting ice
Boiling water
Rusting of iron
Cutting paper
#2
Which of the following is an example of a physical change?
Burning wood
Rusting of iron
Melting wax
Cooking an egg
#3
Which of the following is an example of a chemical property?
Density
Color
Flammability
Boiling point
#4
Which of the following is an example of a physical property?
Toxicity
Density
Corrosiveness
Ability to rust
#5
Which of the following is a chemical change?
Boiling water
Freezing water
Burning wood
Dissolving sugar in water
#6
What is the Law of Conservation of Energy?
Energy cannot be created or destroyed, only transferred or transformed
Energy increases with temperature
Energy decreases with motion
Energy changes its form spontaneously
#7
Which of the following is an example of an endothermic reaction?
Burning wood
Condensation of water vapor
Photosynthesis
Freezing of water
#8
What is the SI unit of energy?
#9
Which law states that the total energy of an isolated system remains constant over time?
First Law of Thermodynamics
Second Law of Thermodynamics
Law of Conservation of Energy
Newton's First Law
#10
What is the unit of measurement for heat energy?
#11
What is the formula to calculate specific heat?
Q = mcΔT
Q = mL
Q = mc
Q = mv
#12
What is the name of the process where a gas changes directly into a solid?
Condensation
Deposition
Sublimation
Evaporation
#13
What is the formula for calculating kinetic energy?
KE = mv^2
KE = 1/2 mv^2
KE = mgh
KE = Fd
#14
In a chemical reaction, what does the term 'reactants' refer to?
Substances formed by the reaction
Substances consumed by the reaction
Substances that catalyze the reaction
Substances present in a closed system
#15
What law states that for every action, there is an equal and opposite reaction?
Newton's First Law
Newton's Second Law
Newton's Third Law
Law of Inertia