C,C,R
Definitions
m c delta T
Variables
Misc
100
Heat transfer through direct contact
Conduction
100
Temperature
the average kinetic energy (speed) of the particles within a substance
100
The variable "c" represents
specific heat
100
Independent variable is the one that I....
change
100
Which of the following has the greatest thermal energy?
Large iceberg, hot cup of coffee, small warm puddle of water
Large iceberg
200
Heat transfer through bulk movement of matter
Convection
200
Thermal Energy
the total potential and kinetic energy in an object
200
The unit for energy is
calories (or Joules)
200
The variables that stay the same are called
controlled variables
200
A system that does not allow energy to be lost the environment is called a
closed system
300
Heat transfer through outer space
Radiation
300
Heat
Thermal energy that is transferred between 2 objects
300
How much energy would it take to increase 50 g of water by 20 degrees Celsius?
1000 calories
300
Identify the dependent variable in this experiment:
Olivia wants to test to see how amount of sunlight affects the growth of her sunflowers. She places one in the shade, one in partial sun, and one in full sunlight, then measures the height of the flowers after 2 weeks.
Height of sunflowers
300
Is this an open or closed system?
Open system
400
This type of heat transfer works best in solids
Conduction
400
Specific heat
The amount of thermal energy required to raise the temperature of 1g of a substance 1 degree Celsius
400
How much energy would be lost by 10 g of iron (specific heat = .11 cal/g° C) that cooled from 120° C to 60° C ?
66 calories
400
Identify two controlled variables in the following experiment:
A student wants to see if studying with different types of music will increase her math test scores. On day 1 she plays classical music for 20 minutes, day 2 she played rap music, and day 3 she played country music.
Two controlled variables: 20 minutes, same test
400
Water has a ________ specific heat, so it heats up _________ and cools down __________.
High, slow, slow
500
This type of heat transfer works occurs in liquids and gases
Convection
500
Energy source and energy sink
Source - warmer object, sink - colder object
500
How much energy would have to be added to raise the temperature of 8 g of gold (specific heat = 0.031 cal/g°C) from 10 degrees Celsius to 90 degrees Celsius.
19.84 calories
500
Identify the independent and dependent variables:
How does the temperature of water affect how fast sugar dissolves?
Independent: temperature of water
Dependent: speed of sugar dissolving
500
Which of the following would transfer heat the quickest?
Lead