*Question*
Q: What is the attraction of oppositely charged ions caused by electron transfer called?   Read this paragraph and choose the correct option from the provided answers:  The attraction of oppositely charged ions caused by electron transfer is called an ionic bond.   Choices:  - covalent bond  - velocity bond  - solvent bond  - ionic bond   A:
**Answer**
ionic bond

*Question*
Q: Where does most geological activity take place?   Read this paragraph and choose the correct option from the provided answers:  Most geological activity takes place at plate boundaries. This activity includes volcanoes, earthquakes, and mountain building. The activity occurs as plates interact. Giant slabs of lithosphere moving around can create a lot of activity! The features seen at a plate boundary are determined by the direction of plate motion and by the type of crust found at the boundary.   Choices:  - plate buildings  - plate waves  - plate medians  - plate boundaries   A:
**Answer**
plate boundaries

*Question*
Q: What term describes the process where organisms convert atmospheric nitrogen into biologically useful chemicals?   Read this paragraph and choose the correct option from the provided answers:  Most pure nitrogen comes from the fractional distillation of liquid air. The atmosphere consists of 78% nitrogen by volume. This means there are more than 20 million tons of nitrogen over every square mile of the earth’s surface. Nitrogen is a component of proteins and of the genetic material (DNA/RNA) of all plants and animals. Under ordinary conditions, nitrogen is a colorless, odorless, and tasteless gas. It boils at 77 K and freezes at 63 K. Liquid nitrogen is a useful coolant because it is inexpensive and has a low boiling point. Nitrogen is very unreactive because of the very strong triple bond between the nitrogen atoms. The only common reactions at room temperature occur with lithium to form Li3N, with certain transition metal complexes, and with hydrogen or oxygen in nitrogenfixing bacteria. The general lack of reactivity of nitrogen makes the remarkable ability of some bacteria to synthesize nitrogen compounds using atmospheric nitrogen gas as the source one of the most exciting chemical events on our planet. This process is one type of nitrogen fixation. In this case, nitrogen fixation is the process where organisms convert atmospheric nitrogen into biologically useful chemicals. Nitrogen fixation also occurs when lightning passes through air, causing molecular nitrogen to react with oxygen to form nitrogen oxides, which are then carried down to the soil.   Choices:  - carbon cycle  - cellular respiration  - photosynthesis  - nitrogen fixation   A:
**Answer**
nitrogen fixation

*Question*
Q: What effect occurs when a few individuals start, or found, a new population?   Read this paragraph and choose the correct option from the provided answers:  Founder effect occurs when a few individuals start, or found, a new population. By chance, allele frequencies of the founders may be different from allele frequencies of the population they left. An example is described in the Figure below .   Choices:  - divergent  - convergent  - pioneer  - founder   A:
**Answer**

founder