Abeka Grade 9 Science Matter and Energy Test 4 || Answers 100%
Rated Correct.
What scientific idea is the first law of thermodynamics practical restatement of? correct answers
law of conservation of energy
How does the addition of a solute change the freezing point of a liquid? correct answers
temperature descreases
According to the second law of thermodynamics, what property do natural processes tend to
increase? correct answers entropy
What situation is an example of radiation? correct answers warming hands by a fire
What type of potential energy is caused by restorative forces? correct answers elastic potential
energy
What is the temperature at which evaporation occurs throughout a liquid? correct answers
boiling point
How does the volume of a liquid water change as water is cooled from 4°C to 0°C? correct
answers Volume expands.
What is the weakest fundamental force? correct answers gravitational force
What fundamental force is responsible for elastic potential energy? correct answers
electromagnetic force
What is the most important component of a heat pump? correct answers refrigerant
, Which method of heat transfer does a hot-water system use to heat a room? correct answers
convection
What theoretical device would generate the maximum possible amount of work from a given
amount of heat? correct answers Carnot engine
The following containers are completely filled with water that is at room temperature (20°C).
Which container has the least amount of thermal energy?
a. foam cup (0.15 L)
b. glass beaker (0.40 L)
c. plastic bucket (18 L)
d. metal kitchen sink (95 L) correct answers a. foam cup (1.15 L)
Why is heat of vaporization of a substance much greater than heat of fusion of the same
substance? correct answers The cohesion of molecules must be completely overcome.
What is the relationship between work and energy? correct answers Energy is measured by the
amount of work that it can do.
What is the relationship between vapor pressure and the temperature of a liquid? correct answers
As temperature increases, vapor pressure increases.
What is the purpose of a heat pump's condenser? correct answers to cool a hot fluid and release
heat into the surroundings
How does a safety lamp work? correct answers A metal screen conducts heat into the air.
What device uses mechanical energy and latent heat to transfer thermal energy from a colder
location to a warmer location? correct answers heat pump
Rated Correct.
What scientific idea is the first law of thermodynamics practical restatement of? correct answers
law of conservation of energy
How does the addition of a solute change the freezing point of a liquid? correct answers
temperature descreases
According to the second law of thermodynamics, what property do natural processes tend to
increase? correct answers entropy
What situation is an example of radiation? correct answers warming hands by a fire
What type of potential energy is caused by restorative forces? correct answers elastic potential
energy
What is the temperature at which evaporation occurs throughout a liquid? correct answers
boiling point
How does the volume of a liquid water change as water is cooled from 4°C to 0°C? correct
answers Volume expands.
What is the weakest fundamental force? correct answers gravitational force
What fundamental force is responsible for elastic potential energy? correct answers
electromagnetic force
What is the most important component of a heat pump? correct answers refrigerant
, Which method of heat transfer does a hot-water system use to heat a room? correct answers
convection
What theoretical device would generate the maximum possible amount of work from a given
amount of heat? correct answers Carnot engine
The following containers are completely filled with water that is at room temperature (20°C).
Which container has the least amount of thermal energy?
a. foam cup (0.15 L)
b. glass beaker (0.40 L)
c. plastic bucket (18 L)
d. metal kitchen sink (95 L) correct answers a. foam cup (1.15 L)
Why is heat of vaporization of a substance much greater than heat of fusion of the same
substance? correct answers The cohesion of molecules must be completely overcome.
What is the relationship between work and energy? correct answers Energy is measured by the
amount of work that it can do.
What is the relationship between vapor pressure and the temperature of a liquid? correct answers
As temperature increases, vapor pressure increases.
What is the purpose of a heat pump's condenser? correct answers to cool a hot fluid and release
heat into the surroundings
How does a safety lamp work? correct answers A metal screen conducts heat into the air.
What device uses mechanical energy and latent heat to transfer thermal energy from a colder
location to a warmer location? correct answers heat pump
