*Question*
Answer the following question given this paragraph: In polar covalent bonds, electrons are not shared equally between the two atoms, so one atom is slightly negative in charge and one is slightly positive in charge. In nonpolar covalent bonds, electrons are shared equally so the atoms remain neutral in charge. Q: Electrons are not shared equally between the two atoms in which type of covalent bonds? Choices: - wide - narrow - solar - polar A:
**Answer**
polar

*Question*
Answer the following question given this paragraph: Many Earth scientists collect data in the field, called field work . The data may be from observations or measurements. The scientists may create a geological map of the area. They might write detailed descriptions of the rocks and their relationships. They may collect samples to analyze in the lab. They may do a combination of all of these! Earth science laboratories contain high-tech equipment. That equipment can reveal the chemistry or age of a rock sample. Geologists do field work to look for resources. They may study a region for environmental cleanup. There are many other reasons for going in the field. One common reason is just to understand the region better. Q: The scientific process of collecting data outside the lab (in the "wild") is known as what kind of work? Choices: - scientific investigation - experimentation - track work - field work A:
**Answer**
field work

*Question*
Answer the following question given this paragraph: Abiotic factors are the nonliving parts of ecosystems. They include air, soil, and other things organisms need. They determine which organisms and how many of them can live in an ecosystem. Q: What are the nonliving parts of ecosystems like soil and air called? Choices: - exemplified factors - irrelevant factors - inorganic factors - abiotic factors A:
**Answer**
abiotic factors

*Question*
Answer the following question given this paragraph: Evolution occurs in a population when allele frequencies change over time. What causes allele frequencies to change? That question was answered by Godfrey Hardy and Wilhelm Weinberg in 1908. Q: What kind of change causes evolution in population? Choices: - morphogenesis frequency changes - paragenic frequency changes - transgenic frequency changes - allele frequency changes A:
**Answer**
allele frequency changes