2024-25 Common Assessment ( December)

Front

What is an electric field?

Back

An electric field is a region around a charged object where other charged objects experience a force. It is represented by electric field lines that indicate the direction and strength of the field.

Front

What determines the direction of an electric field?

Back

The direction of an electric field is determined by the nature of the charge creating it: it points away from positive charges and towards negative charges.

Front

What is thermal conduction?

Back

Thermal conduction is the process by which heat energy is transferred through collisions between particles in a material.

Front

What is the role of insulation in heat transfer?

Back

Insulation reduces heat transfer by creating a barrier that minimizes conduction, convection, and radiation.

Front

What indicates a chemical reaction has occurred?

Back

The formation of a new chemical substance is a key indicator of a chemical reaction.

Front

What is kinetic energy?

Back

Kinetic energy is the energy an object possesses due to its motion, calculated as KE = 1/2 mv², where m is mass and v is velocity.

Front

How does mass affect kinetic energy?

Back

For two objects moving at the same speed, the object with greater mass will have more kinetic energy.

Front

What is the principle of conservation of momentum?

Back

The principle of conservation of momentum states that the total momentum of a closed system remains constant if no external forces act on it.

Front

What happens during a collision between two objects?

Back

During a collision, momentum is transferred between the objects, and they may experience changes in velocity and kinetic energy.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance without changing its chemical composition, while a chemical change results in the formation of new substances.