U3L3 Energy Flow

Two brothers, Alex and Zayne, are giving their dogs baths in two separate bathtubs. Both bathtubs are filled halfway with water, and their temperatures are measured using the same thermometer. The temperature of each bathtub's water is 103 °F. Alex's bathtub holds twice the volume as Zayne's bathtub. Which bathtub has more thermal energy?

• Alex's bathtub has more thermal energy.

• Zayne's bathtub has more thermal energy.

• The bathtubs have the same amount of thermal energy.

• The amount of thermal energy would depend on the placement of the thermometer in the bathtub.

Imagine a system where: The used fuel rods from a nuclear reactor are stored in cooling pools, where thermal energy is transferred from the hot fuel rods to the cool water. How would the temperatures of the components of this system change if additional hot fuel rods were placed in the pool after a steady temperature was reached?

• The temperature of the water and the original fuel rods would decrease.

• The temperature of the water and the original fuel rods would increase.

• The temperature of the water would decrease, but the temperature of the original fuel rods would not change.

• The temperature of the water would increase, but the temperature of the original fuel rods would not change.

Suppose you have two identical objects that have the same mass and are made of the same material. One object is 20 °C warmer than the other object. Mark only one oval.

• The object that has more energy is the object whose temperature is higher.

• The object that has more energy is the object whose temperature is lower.

• Both objects have the same amount of energy.

• They don't have energy they are objects.

Suppose you have two objects that are made of the same material but have different masses. The two objects are the same temperature. Mark only one oval.

• The object with more thermal energy has more mass.

• The object with more thermal energy has less mass.

• The objects have the same mass.

What absorbs more thermal energy? Mark only one oval.

• Light colored objects

• Dark colored objects

Based on the information in the table, which material transfers thermal energy the best?

• copper

• bronze

• iron

• tungsten

Based on the information in the table, which material would be the best insulator?

• aluminum

• cloth

• copper

• polystyrene foam

What direction does Thermal Energy Flow?

• From colder to warmer.

• From warmer to colder.

• Up

• From left to right.

Which image represents hotter water?

• The image on the left.

• The image on the right.

After adding food coloring to identical beakers, which contains colder water?

• The beaker on the left.

• The beaker on the right.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4