Answer the following question given this paragraph: Because air is a gas, its molecules have a lot of energy. Air molecules move a lot and bump into things. For this reason, they exert pressure. Air pressure is defined as the weight of the air pressing against a given area. Q: Air is an example of what state of matter? Choices: - solid - liquid - plasma - gas A:
gas
Answer the following question given this paragraph: Mammals generate heat mainly by keeping their metabolic rate high. The cells of mammals have many more mitochondria than the cells of other animals. The extra mitochondria generate enough energy to keep the rate of metabolism high. Mammals can also generate little bursts of heat by shivering. Shivering occurs when many muscles contract a little bit all at once. Each muscle that contracts produces a small amount of heat. Q: Mammals generate heat primarily by maintaining a high rate of what? Choices: - reproduction - respiration - movement - metabolism A:
metabolism
Q: Answer the following question given this paragraph: Q: Cells in a biofilm secrete what to recruit nearby cells? Choices: - signaling proteins - harnessing molecules - signaling neurons - signaling molecules A:
A: signaling molecules
Question: Answer the following question given this paragraph: Appendix: Periodic Table of the Elements In this chapter, we present some data on the chemical elements. The periodic table, introduced in Chapter 3 "Atoms, Molecules, and Ions", lists all the known chemical elements, arranged by atomic number (that is, the number of protons in the nucleus). The periodic table is arguably the best tool in all of science; no other branch of science can summarize its fundamental constituents in such a concise and useful way. Many of the physical and chemical properties of the elements are either known or understood based on their positions on the periodic table. Periodic tables are available with a variety of chemical and physical properties listed in each element's box. What follows here is a more complex version of the periodic table than what was presented inChapter 3 "Atoms, Molecules, and Ions". The Internet is a great place to find periodic tables that contain additional information. One item on most periodic tables is the atomic mass of each element. For many applications, only one or two decimal places are necessary for the atomic mass. However, some applications (especially nuclear chemistry; see Chapter 15 "Nuclear Chemistry") require more decimal places. The atomic masses in Table 17.1 "The Basics of the Elements of the Periodic Table" represent the number of decimal places recognized by the International Union of Pure and Applied Chemistry, the worldwide body that develops standards for chemistry. The atomic masses of some elements are known very precisely, to a large number of decimal places. The atomic masses of other elements, especially radioactive elements, are not known as precisely. Some elements, such as lithium, can have varying atomic masses depending on how their isotopes are isolated. The web offers many interactive periodic table resources. For example, seehttp://www. ptable. Q: What organizational tool, arguably the best in all of science, lists all the known chemical elements, arranged by atomic number? Choices: - tide table - logic table - spreadsheet - periodic table A:
Answer: periodic table
*Question*
Answer the following question given this paragraph: Magnetism produced by electricity is called electromagnetism . Today, electromagnetism is used in many electric devices. However, until electromagnetism was discovered, scientists thought that electricity and magnetism were unrelated. A Danish scientist named Hans Christian Oersted (pictured in the Figure below ) changed all that. He made the important discovery that electric current creates a magnetic field. But like many other important discoveries in science, Oersted's discovery was just a lucky accident. Q: What magnetism is produced by electricity? Choices: - excitation - diffusion - Charges - electromagnetism A:
**Answer**
electromagnetism
Q: Answer the following question given this paragraph: Living things that undergo photosynthesis and produce glucose include plants, cyanobacteria, and algae. Q: Plants, cyanobacteria, and algae are living things that undergo what process and produce glucose? Choices: - cellular respiration - cytoplasmic transfer - glycolysis - photosynthesis A:
A: photosynthesis