Answer:
B. convection because warm air rises and cool air sinks.
Explanation:
The processes that enables birds to fly to higher altitudes without flapping their winds while riding air thermals is called convection.
Convection is one of the forms of heat transfer usually found in gases and liquids.
- In convection density differences due to temperature changes causes the circulation.
- Warm air is less dense and it is hotter.
- It rises up from the surface where it is warmed
- Cold air sinks to replace the warm air. Cold air form when the air loses its energy to the surrounding.
- By virtue of this, birds are able to take advantage of it for their flight.
They are grouped together because they share certain physical and chemical properties. For instance, metals are dense, shiny, good conductors of heat and electricity, and they easily lose electrons in chemical reactions. In contrast, nonmetals have the opposite properties.
1. Inorganic combustion
2. Organic combustion
<h3>Further explanation</h3>
Given
The chemical equations
Required
Balanced equation
Solution
Organic compounds have the characteristic that there is a chain of carbon atoms, while inorganic does not have a chain of carbon atoms
The reaction of a substance with oxygen is called a combustion reaction
Complete combustion of carbon compounds will get CO₂ gas, whereas if it is not complete it will produce CO gas
So Organic : contain a carbon atom (and often a hydrogen atom)
1. Ca + O₂ ⇒ CaO₂
Inorganic combustion⇒does not contain carbon
2. C₃H₂O + 3O₂ → 3CO₂ + H₂O
Organic combustion