Which statements represent convection? check all that apply

black asphalt gets very hot on a sunny day

the movement of air in a hot air balloon makes it rise into the sky

adark sand beach can burn the soles of your feet

a spoon gets warm from sitting in a soup pot

a house has high heating bills because the heat ends up in the attic

a house loses heat through an exterior wall.

Explanation:

Thermal convection is the process of heat transmission in which thermal energy propagates through the transport of matter, due to a density difference and the action of gravity. In this sense the warmer matter becomes less dense and tends to rise, while the cold matter tends to go down. Two examples of this are:

cellular respiration oxidizes food into energy in the form of atps.

glycolysis (6 c hexose) > 2x atps are used > 6c hexose biphosphate > 2 x 3c triphosphate >

2 x 3c pyruvate (2x nadh produced from nad) and (4x atp produced)

pyruvate actively pumped mitochondrial matrix.