ENERGY AND THERMAL ENERGY

By which propagation mechanism does the Sun heat the water in the seas?

• Radiation

• Convection

• Conduction

Answer explanation

The energy of the Sun reaches the Earth by radiation. When it is absorbed, conduction mechanisms

occur in solids (geosphere), and convection mechanisms in liquids (hydrosphere) and gases

(atmosphere).

There is no transport of matter

• Convection

• Radiation

• Conduction

• All above

Is there anybody, or material system, without energy? Why?

• No, because all bodies have internal energy (thermal, chemical etc).

• Yes, somebodies have internal energy.

• Another issue to be discussed is whether the energy can be employed for obtaining a useful change.

     It does not need a material means.

• Conduction

• Convection

• Radiation

Think about yourself for a moment: If the person is not performing any action, the transfer is by.........

• Heat

• Work

• Force

Think about yourself for a moment: When we move objects, or move any part of our body, it is also through....

• Work

• Forces

• Energy

  Temperature is directly related to the kinetic energy of the average of the whole group of particles which the matter is made of.

• True

• False

For there to be thermal energy transfer, it is necessary that the material systems are in physical contact with each other.

• False

• True

  In construction, expansion joints are left so that solid parts can expand when heated

• True

• False

It is very important that the cables that hang from pole to pole are very tense in order to avoid the breakage that they can suffer resulting from the effects of heat.

• True

• False