Science MCQs

No fluid means no convection currents can form.

Black surfaces radiate heat more effectively cooling the fridge faster.

Radiation is the only method that works in a vacuum like space.

It minimizes heat loss via conduction convection and radiation.

The dark plate absorbs more heat melting the wax faster.

Birds use thermal updrafts (convection) to stay aloft with less effort.

Sparse molecules reduce collisions slowing conductive heat transfer.

The shiny surface reflects heat back inward reducing radiative loss.

Radiation is the transfer of heat through electromagnetic waves. The sun emits these waves, which travel through space and reach Earth. When these waves interact with our skin, they are absorbed and converted into heat energy. This is how we feel warm when exposed to sunlight. 

Conduction is the transfer of heat through direct contact between objects. In this case, the heat from the hot water directly transfers to the metal spoon through their contact.