Energy Transfer and Temperature Quick Check
1. What is energy transfer?
Energy transfer is the movement of energy from one place or object to another.
2. What are the three methods of heat transfer?
The three methods of heat transfer are conduction, convection, and radiation.
3. How do molecules behave when they’re heated?
When molecules are heated, they gain energy and move faster, which increases their kinetic energy.
4. What is temperature?
Temperature is a measure of the average kinetic energy of the particles in a system.
5. How is temperature measured?
Temperature is often measured using a thermometer, which detects changes in volume or pressure caused by changes in temperature.
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Sample Observation
1 The drop of food coloring spreads slowly.
2 The drop of food coloring spreads very quickly.
A student places a drop of food coloring into two water samples. Her observations are shown in the table. Which statement best explains the observations in the table?
(1 point)
Responses
The water molecules of sample 1 are moving faster.
The water molecules of sample 1 are moving faster.
The temperature of sample 2 is close to freezing.
The temperature of sample 2 is close to freezing.
The temperature of sample 2 is higher.
The temperature of sample 2 is higher.
The water molecules of sample 1 are transferring more kinetic energy.
The water molecules of sample 1 are transferring more kinetic energy.
M, L, N
To answer questions about energy transfer and temperature, we need to have a basic understanding of these concepts and how they relate to each other. Let's go through a quick check to review their key points:
1. What is energy transfer?
Energy transfer is the movement of energy from one object or system to another. Energy can be transferred in various forms, such as heat, light, sound, or mechanical work.
2. How does temperature relate to energy transfer?
Temperature is a measure of the average kinetic energy of the particles in a substance. When objects with different temperatures come into contact, there can be energy transfer in the form of heat. Heat always flows from a region of higher temperature to a region of lower temperature until thermal equilibrium is reached.
3. What are the different modes of energy transfer?
There are three main modes of energy transfer:
a) Conduction: Transfer of heat through direct contact between particles of a solid.
b) Convection: Transfer of heat by the movement of fluids (liquids or gases) due to density differences caused by temperature variations.
c) Radiation: Transfer of heat through electromagnetic waves, such as light, infrared radiation, or radio waves.
4. How can we measure temperature?
Temperature can be measured using various scales, but the most commonly used scale is the Celsius (°C) scale or the Kelvin (K) scale. The Celsius scale sets the freezing point of water at 0°C and the boiling point at 100°C, while the Kelvin scale starts from absolute zero (0K), which is the lowest possible temperature.
5. How is energy transfer calculated?
The amount of energy transferred can be calculated using specific formulas and equations depending on the mode of transfer and the specific situation. For example, to calculate the amount of heat transferred through conduction, we can use the equation Q = kAΔT/d, where Q is the amount of heat, k is the thermal conductivity of the material, A is the cross-sectional area of heat transfer, ΔT is the temperature difference, and d is the distance over which heat is transferred.
Remember, these are just some key points about energy transfer and temperature. For more in-depth explanations and complex calculations, it is recommended to consult textbooks or online resources on thermodynamics and heat transfer.
A student lists some possible ways to investigate the transfer of kinetic energy using ice in a sample of water. Which procedure would be best to investigate the transfer of kinetic energy?
2
1
3
4
explain
Which experimental setup would let a student investigate the connection between kinetic energy and temperature?(1 point)
Responses
placing one drop of food coloring in a cup with 50 mL of water at 10ºC; placing one drop of food coloring in a second cup with 50 mL of water at 40ºC
placing one drop of food coloring in a cup with 50 mL of water at 10ºC; placing one drop of food coloring in a second cup with 50 mL of water at 40ºC
placing one drop of food coloring in a cup with 50 mL of water at 10ºC; placing two drops of food coloring in a second cup with 100 mL of water at 40ºC
placing one drop of food coloring in a cup with 50 mL of water at 10ºC; placing two drops of food coloring in a second cup with 100 mL of water at 40ºC
placing one drop of food coloring in a cup with 50 mL of water at 10ºC; placing two drops of food coloring in a second cup with 50 mL of water at 10ºC
placing one drop of food coloring in a cup with 50 mL of water at 10ºC; placing two drops of food coloring in a second cup with 50 mL of water at 10ºC
placing one drop of food coloring in a cup with 50 mL of water at 10ºC; placing one drop of food coloring in a second cup with 100 mL of water at 10ºC
placing one drop of food coloring in a cup with 50 mL of water at 10ºC; placing one drop of food coloring in a second cup with 50 mL of water at 40ºC
Energy Transfer and Temperature Quick Check
3 of 43 of 4 Items
Question
Use the table to answer the question.
Procedure Number Procedure Steps
1
Record temperature of water.
Put ice in water.
Record temperature after ice melts.
2
Put ice in water.
Touch water to determine if it feels colder after ice melts.
3
Measure the mass of the water.
Put ice in water.
Measure the mass of water as ice cubes melt.
4
Determine temperature and mass of water.
Put ice in water.
Record the time for ice to melt.
A student lists some possible ways to investigate the transfer of kinetic energy using ice in a sample of water. Which procedure would be best to investigate the transfer of kinetic energy?
(1 point)
Responses
4
4
2
2
3
3
1
1