Remedial Session1-Gr6-23-24-Sep18 & 19-6pm-7pm

Thermal energy is also known as _______

• Chemical energy

• Electrical energy

• Mechanical energy

• Heat energy

Answer explanation

Thermal means Heat

So Thermal energy is also known as heat energy.

Thermal energy is the total energy (P.E + K.E) of the system. And depends on:

1. 1. Number of particles

2. 2. State of the material

3. 3. Temperature

Heat energy always flows from ________ to ________.

• Low temperature to high temperature

• high temperature to low temperature

• cold to hot

• solid to liquids

Answer explanation

Heat energy (thermal energy) always flows from high temperature to low temperatures which means from hot objects to cold objects.

Heat always moves from _________ object to __________ object.

• hot to hot

• warm to cold

• cold to cold

• cold to warm

If we place a pan of water on a stove and let it heat up properly. After some time we will see bubbles all over in the water and liquid water changing into gaseous water vapor. Then what is this type of change called?

• Melting

• Evaporation

• Boiling

• condensation

Answer explanation

What happens when we heat a substance?

Answer explanation

When substances are heated, particles gain heat energy and they start to move away from each other.

What is Temperature?

• Temperature is the average potential energy of an object

• Temperature is the total potential energy of an object

• Temperature is the average kinetic energy of an object

• Temperature is the total kinetic energy of an object

Answer explanation

Temperature is defined as the measure of the average kinetic energy of a system.

What happens when temperature increases?

• Particles gain energy and vibrate faster and so the kinetic energy decreases.

• Particles gain energy and vibrate faster and so the kinetic energy increases.

• Particles lose energy and vibrate faster and so the kinetic energy increases.

• Particles lose energy and vibrate faster and so the kinetic energy decreases.

Answer explanation

When temperature increases then kinetic energy of the particles also increase.

The energy in motion is called ____________ energy and the energy at rest is called __________ energy.

Answer explanation

The energy in motion is called kinetic energy.

The energy at rest or stored energy is called potential energy.

Which state of matter molecules are very tightly packed?

• solids

• liquids

• gases

Answer explanation

Which state of matter molecules are spaced furthest apart?

• Solids

• Liquids

• Gases