Heat Flow Question Preview (ID: 34064)
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There are three main ways in which heat can be transferred in the Earth system. How does heat transfer by radiation differ from heat transfer by conduction or convection?
a) Radiation only transfers energy from the sun to the Earth system.
b) Radiation occurs only when temperature differences are very large.
c) Radiation relies on contact between objects that are in contact to transfer energy.
d) Radiation can transfer energy between objects that are not in contact with each other.
As air near Earth’s surface is heated by energy absorbed from sunlight, warm air rises into the atmosphere and cools. This cool air sinks back to Earth’s surface. What process causes this movement of air in the atmosphere?
a) conduction
b) convection
c) polarization
d) radiation
In winter, cold air can come into direct contact with warmer ground. Which statement best describes how this cold air is warmed by conduction?
a) Energy is transferred to the air touching the ground.
b) Cold air sinks to the ground and then pushes the warm air up
c) Energy flows from the cold air down to the warm ground.
d) The air absorbs the energy that flows up from the ground.
Air circulates in Earth’s atmosphere. Which of the following is the fundamental cause of air circulation in Earth’s atmosphere?
a) Earth's gravity
b) ocean currents
c) Earth's magnetic field
d) temperature differences
Conduction happens as energy flows from a warmer object to a cooler object. Which of the following is an example of conduction?
a) electromagnetic radiation transfers energy from the sun to Earth
b) warmer air is pushed upward and out of the way by cooler air
c) cooler air molecules come in contact with warm ground, causing energy to be passed to the air
d) dense water sinks to the ocean floor and less dense water moves to the ocean surface
Different areas of Earth’s oceans receive different amounts of energy in the form of heat, resulting in ocean currents and weather patterns. What is the main source of this energy?
a) kinetic energy from tides
b) kinetic energy from ocean currents
c) energy transfer within Earth’s crust
d) electromagnetic radiation from the sun
Kumar is studying how Earth is warmed by sunlight. Which process is mostly responsible for warming the soil in Kumar’s model?
a) Conduction between the lamp and the soil causes the soil to warm.
b) Convection currents between the lamp and the soil cause the soil to warm.
c) Expansion of particles in the soil causes the soil to warm.
d) Radiation from the lamp reaches the soil and causes the soil to warm.
At night, the air is usually cooler than it is during the day. Which term is best defined as a measure of how hot or cold something is?
a) heat
b) temperature
c) kinetic energy
d) thermal energy
A warm rock is in direct contact with the cooler ground. Which of the following will happen?
a) Energy in the form of heat will flow from the rock to the ground, and the temperature of the rock will increase.
b) Energy in the form of heat will flow from the ground to the rock, and the temperature of the rock will increase.
c) Energy in the form of heat will flow from the rock to the ground, and the temperature of the rock will decrease.
d) Energy in the form of heat will flow from the ground to the rock, and the temperature of the rock will decrease.
Thermal energy can be classified as which of the following?
a) Solids
b) Heat
c) Density
d) Gas
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