Q: Chemists use simple diagrams to show an atom's valence electrons and how they do what? Read this paragraph and choose the correct option from the provided answers: Lewis Diagrams Chemists use simple diagrams to show an atom's valence electrons and how they transfer. These diagrams have two advantages over the electron shell diagrams introduced in Chapter 2 "Elements, Atoms, and the Periodic Table". First, they show only valence electrons. Second, instead of having a circle around the chemical symbol to represent the electron shell, they have up to eight dots around the symbol; each dot. Choices: - bond - react - escape - transfer A:
transfer

(Question)
Q: What travels 9.5 trillion kilometers a year? Read this paragraph and choose the correct option from the provided answers: the distance light can travel in one year, 9.5 trillion kilometers. Choices: - Sound - electricity - air - light A:
(Answer)
light

Ques: Q: Where is the only place an electric charge can be found? Read this paragraph and choose the correct option from the provided answers: Electric charge is found only in a conductor. Choices: - translator - ion - neuron - conductor A:
Ans: conductor

(Q).
Q: A wildfire clears a forest of vegetation and animal life, returning their nutrients to the ground leaving a foundation for rapid recolonization. what is this a classic example of? Read this paragraph and choose the correct option from the provided answers: Secondary succession A classic example of secondary succession occurs in oak and hickory forests cleared by wildfire (Figure 19.27). Wildfires will burn most vegetation, and unless the animals can flee the area, they are killed. Their nutrients, however, are returned to the ground in the form of ash. Thus, although the community has been dramatically altered, there is a soil ecosystem present that provides a foundation for rapid recolonization. Before the fire, the vegetation was dominated by tall trees with access to the major plant energy resource: sunlight. Their height gave them access to sunlight while also shading the ground and other low-lying species. After the fire, though, these trees are no longer dominant. Thus, the first plants to grow back are usually annual plants followed within a few years by quickly growing and spreading grasses and other pioneer species. Due, at least in part, to changes in the environment brought on by the growth of grasses and forbs, over many years, shrubs emerge along with small pine, oak, and hickory trees. These organisms are called intermediate species. Eventually, over 150 years, the forest will reach its equilibrium point and resemble the community before the fire. This equilibrium state is referred to as the climax community, which will remain until the next disturbance. The climax community is typically characteristic of a given climate and geology. Although the community in equilibrium looks the same once it is attained, the equilibrium is a dynamic one with constant changes in abundance and sometimes species identities. The return of a natural ecosystem after agricultural activities is also a well-documented secondary succession process. Choices: - primary succession - typical succession - cause succession - secondary succession A:
(A).
secondary succession

Ques:Q: What type of ionic compound is formed from acid and bases reacting with each other? Read this paragraph and choose the correct option from the provided answers: Acids have some properties in common. They turn litmus, a plant extract, red. They react with some metals to give off H2 gas. They react with carbonate and hydrogen carbonate salts to give off CO2 gas. Acids that are ingested typically have a sour, sharp taste. (The name acid comes from the Latin word acidus, meaning "sour. ") Bases also have some properties in common. They are slippery to the touch, turn litmus blue, and have a bitter flavor if ingested. Acids and bases have another property: they react with each other to make water and an ionic compound called a salt. A salt, in chemistry, is any ionic compound made by combining an acid with a base. A reaction between an acid and a base is called a neutralization reaction and can be represented as follows: acid + base H2O + salt The stoichiometry of the balanced chemical equation depends on the number of H+ions in the acid and the number of OH ions in the base. Choices: - isolated - common - dry - salt A:

Ans:salt

Ques: Q: If something is in the state of matter where it has both a definite shape and volume, then what state of matter is it in? Read this paragraph and choose the correct option from the provided answers: Choices: - gas - plasma - liquid - solid A:
Ans:
solid