Answer to Question 1
Not all goods are economic goods. Economic goods are a subset of all goods, and are produced from scarce resources. Sunlight is an example of a good that is not an economic good. Hence, the answer to the second question is yes.
Answer to Question 2
Scarcity exists because the wants of human beings are unlimited while resources are limited. The meaning of a shortage is not the same as scarcity. A shortage exists when people have to wait in line for things, especially on a temporary basis. Scarcity relates to the poor but also to the rich; scarcity is a fact of life that affects everyone. A shortage occurs when the quantity of a good desired exceeds the quantity available at a positive price.