Answer:
1. Hot air is less dense and has moved upward allowing cool air to move downward which is less dens
(Convection current)
2. The ceiling has transferred heat to him by radiation.
Explanation:
During the day when air is heated as a result of the ceiling transferring heat to it, it becomes less dens and it gains energy, which make it lighter in weight than cooler air, this hot air moves upward allowing cooler air to move downward.
Answer And Explanation:
Primary sources of online data could be blog posts, twitter posts, and vlogs because the person producing forms of work is giving first-person account of his experience.
Secondary sources online data could be articles, news, and documentaries because people have gathered several primary sources to build their case that they are making.
Hope this is clear, and good luck with studies :)
Answer:
c
Explanation:
just trying to follow basic grammar.
