Heat Transfer Quiz 2

Which object has more thermal energy?

Bowl of Cereal Bowl of Soup

• The bowl of soup has more thermal energy, because its molecules are moving slower than the molecules in the cereal.

• The cereal has more thermal energy, because its molecules are moving slower.

• The bowl of soup has more thermal energy, because its molecules are moving faster.

• The bowl of cereal has more thermal energy, because its molecules are moving faster.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Vivian placed an ice cube in a tray of warm water. The following picture shows her investigation. Which statement describes the energy transfer that happens in Vivian’s investigation?

• Energy in the form of heat is transferred from the ice cube to the water by radiation.

• Energy in the form of heat is transferred from the water to the ice cube by radiation.

• Energy in the form of heat is transferred from the ice cube to the water by conduction.

• Energy in the form of heat is transferred from the water to the ice cube by conduction

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Kumar is studying how Earth is warmed by sunlight. The following illustration shows his model of the sun and Earth.

Which process is mostly responsible for warming the soil in Kumar’s model?

• Conduction between the lamp and the soil causes the soil to warm.

• Convection currents between the lamp and the soil cause the soil to warm.

• Expansion of particles in the soil causes the soil to warm.

• Radiation from the lamp reaches the soil and causes the soil to warm.

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NGSS.MS-PS3-3

NGSS.MS-PS3-4

What would be the effect on the particles if more heat is supplied to the system?

• They would slow down
• They would stop moving
• They would speed up
• There would be no effect

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

A metal block (A) with a temperature of 25°C is placed on top of another identical metal block (B) with a temperature of 38°C. Which of the following is most likely to occur as soon as you place block A on top of block B?

• Thermal energy will be transferred from block A to block B.
• Both blocks will remain at the same initial temperature
• Thermal energy will be transferred from block B to block A.

 For situation 2 infer the direction of heat flow.

• A to B
• B to A
• no heat flow

1.  Identify the heat transfer in A.

• Radiation
• Convection
• Conduction

1.  Identify the heat transfer in B.

• Radiation
• Convection
• Conduction

1.  Identify the heat transfer in C.

• Radiation
• Convection
• Conduction

What is the definition of CONVECTION?

• The total amount of thermal energy an object has.
• When heat transfers from objects that are touching.
• a  hot liquid or air that  expands, becomes less dense, and rises or becomes more dense, and sinks.
•   heat transfers due to electromagnetic waves traveling through a vacuum