6th Science - Semester 1

Front

What is conduction?

Back

Conduction is the transfer of heat through a material without the movement of the material itself. It occurs when two objects at different temperatures are in direct contact.

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases). It occurs when warmer parts of a fluid rise and cooler parts sink.

Front

What is radiation?

Back

Radiation is the transfer of heat in the form of electromagnetic waves. It does not require a medium to travel through, allowing heat to be transferred through empty space.

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances with different properties. Examples include rusting and burning.

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Examples include melting and freezing.

Front

How many protons does Beryllium have?

Back

Beryllium has 4 protons.

Front

What happens to the melting rate of ice cubes of different sizes?

Back

Smaller ice cubes melt faster than larger ones due to a higher surface area to volume ratio.

Front

What is oxidation?

Back

Oxidation is a chemical reaction that involves the loss of electrons, often associated with the reaction of a substance with oxygen.

Front

What is the difference between a physical and chemical change?

Back

A physical change does not alter the chemical composition of a substance, while a chemical change results in the formation of new substances.

Front

What is temperature?

Back

Temperature is a measure of the average kinetic energy of the particles in a substance, indicating how hot or cold it is.