Heat flow

To turn a liquid into a gas, you _____ energy.

• Add

• Remove

Tags

NGSS.MS-PS1-4

A measure of the average kinetic energy of the particles in an object.

• Convection

• Temperature

• Heat

• Specific Heat

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Lois is preparing a pitcher of iced tea. She brews the hot tea and then adds ice to the pitcher. Which direction is the thermal energy flowing in this system?

• from the tea to the ice

• from the pitcher to the tea

• from the ice to the air

• from the ice to the tea

Tags

NGSS.MS-PS1-4

Byrd made a large cup of hot coffee at 93°C and set it on the counter. If the mug is left sitting on the counter of a room with a temperature air of 25°C, what will happen to the temperature of the coffee?

• The hot coffee will transfer thermal energy into the air, and because the air continues to circulate and carry the heat away, the energy transfer will continue until the coffee is room temperature.

• The air will transfer thermal energy into the coffee, and because the air continues to circulate and carry more heat to the coffee, the energy transfer continues until the coffee is boiling.

• The hot coffee will transfer thermal energy into the cool counter and air and continue to transfer energy until they are all 93°C.

• The cool counter will transfer thermal energy into the coffee and continue to transfer energy until the coffee and counter are both 93°C.

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-3

Sherona had a bowl of ice cream for a snack and forgot to put the carton back into the freezer. What will happen if the ice cream sits on the counter in a 25°C room?

• The counter will freeze as thermal energy from the cold ice cream flows into the warm counter until all the particles in the counter are solid.

• The ice cream will melt as thermal energy flows as cold air from the ice cream into the warmer air and melts.

• The ice cream will melt as thermal energy from the warm room flows into the cold ice cream until it is at equilibrium with the air at 25°C.

• The air will freeze as thermal energy from the cold ice cream flows into the warm air until it reaches equilibrium at 0°C.

Tags

NGSS.MS-PS1-4

What will happen if an ice cube at 0°C is placed into warm water at 30°C in a closed system?

• Energy will flow from the warm water into the cold ice cube, causing the water and the ice cube to warm until both are 30°C.

• Energy will flow from the cold ice cube into the warm water, causing the water to warm and the ice cube to cool until both are 15°C.

• Energy will flow from the warm water into the cold ice cube, causing the water to cool and the ice cube to warm until both are 15°C.

• Energy will flow from the cold ice cube into the warm water, causing the water and ice cube to cool until both are 0°C.

Tags

NGSS.MS-PS1-4

Mr. Mothra likes to collect river rocks on his daily walks. One chilly morning, he picks up a beautiful piece of rock near the bank of the river, and places it in his pocket. If the river rock is a brisk 10°C and Mr. Mothra has a body temperature of 37°C, which of the following best describes the immediate transfer of energy taking place in Mr. Mothra's pocket?

• Thermal energy will flow from Mr. Mothra to the rock.

• Thermal energy will flow from the rock to Mr. Mothra.

• Thermal energy will only flow from Mr. Mothra directly into the air.

• Thermal energy will only flow into the air, and not to Mr. Mothra

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

Gregory is making a turkey for Thanksgiving by roasting it in his oven. The turkey started at a room temperature of 25°C, and the oven was preheated to 175°C. If Gregory accidentally turns off the oven after he places the turkey inside of it, then what will happen to the turkey?

• Thermal energy flows from the oven into the turkey and continues to flow until they reach equilibrium at 100°C or the turkey is removed.

• Thermal energy flows from the turkey into the oven and continues to flow until they reach equilibrium at 100°C or the oven is turned off.

• Thermal energy flows from the turkey into the oven and continues to flow until the turkey reaches its perfect temperature of 74°C.

• Thermal energy flows from the turkey into the oven and continues to flow until the oven is room temperature of 25°C.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

There are three cups of hot cocoa. The temperature of the cocoa in each cup is 25 degrees celsius. Which cup has the MOST thermal energy?

• small

• medium

• large

A high specific heat means.

• It requires more energy to change temperature

• It heats up quickly with energy added

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4