Ijust need these two questions and im !

1. at which point will a cloud form?

a) when the temperature of the rising air rises above the dew point

b) when the temperature of the rising air falls below the dew point

c) when the water vapor forms ice crystals

d) when air reaches 10,000 ft

2. what causes convection currents?

a) density differences

b) earth's gravity

c) fossils

d) they don't exist

What is a difference between systemic and pulmonary circulation? a. systemic circulation carries oxygenated blood to the lungs and pulmonary circulation carries deoxygenated blood to the body. b. systemic circulation carries deoxygenated blood to the lungs and pulmonary circulation carries oxygenated blood to the body. c. systemic circulation carries deoxygenated blood to the body and pulmonary circulation carries oxygenated blood to the lungs. d. systemic circulation carries oxygenated blood to the body and pulmonary circulation carries deoxygenated blood to the lungs.