Answer the following question given this paragraph: Q: What do animals observe in others to help solve problems? Choices: - communication - function - patterns - behavior A:
behavior
Answer the following question given this paragraph: Many common electric devices, such as doorbells, contain electromagnets. If they have moving parts, they are likely to have an electric motor. An electric motor is a device that uses an electromagnet to change electrical energy to kinetic energy. Q: What do electric motors use to change electrical energy into kinetic? Choices: - resonances - generators - fans - electromagnets A:
electromagnets
Q: Answer the following question given this paragraph: A supervolcano eruption took place at Lake Toba in northern Sumatra about 75,000 years ago ( Figure below ). This was the largest eruption in the past 25 million years. As much as 2,800 cubic kilometers of material was ejected into the atmosphere. The result was a 6- to 10-year volcanic winter. Some scientists think that only 10,000 humans survived worldwide. The numbers of other mammals also plummeted. Q: A supervolcano that may have killed all but 10,000 humans resulted in what phenomenon, lasting up to a decade? Choices: - volcano fall - volcanic summer - volcano spring - volcanic winter A:
A: volcanic winter
Question: Answer the following question given this paragraph: Amino acids connect together like beads on a necklace. MET, ASN, TRP, and GLN refer to four different amino acids. Q: Met, asn, trp, and gln connect together like beads on a necklace and are an example of what type of acids? Choices: - polymer acids - organism acids - peptic acids - amino acids A:
Answer: amino acids
*Question*
Answer the following question given this paragraph: The reactants are two electrically neutral elements; they have the same number of electrons as protons. The product, however, is ionic; it is composed of Mg2+ and Clions. Somehow, the individual Mg atoms lose two electrons to make the Mg2+ ion, while the Cl atoms gain an electron to become Cl ions. This reaction involves thetransfer of electrons between atoms. The process of losing and gaining electrons occurs simultaneously. However, mentally we can separate the two processes. Oxidation is defined as the loss of one or more electrons by an atom. Reduction is defined as the gain of one or more electrons by an atom. So oxidation and reduction always occur together; it is only mentally that we can separate them. Chemical reactions that involve the transfer of electrons are called oxidation-reduction (or redox) reactions. Redox reactions require that we keep track of the electrons assigned to each atom in a chemical reaction. How do we do that? We use oxidation numbers to keep track of electrons in atoms. Oxidation numbers are assigned to atoms based on four rules. Oxidation numbers are not necessarily equal to the charge on the atom (although sometimes they can be); we must keep the concepts of charge and oxidation numbers separate. The rules for assigning oxidation numbers to atoms are as follows: 1. Q: What is the term for the loss of one or more electrons by an atom? Choices: - half-life - decomposition - evaporation - oxidation A:
**Answer**
oxidation
Answer the following question given this paragraph: Rutherford's experiment showed that the vast majority of the mass of an atom is concentrated in its nucleus, which is composed of protons and neutrons. The mass of an electron is very small compared to the mass of a neutron or proton, so the electrons in an element do not contribute much to the total mass. The mass number is defined as the total number of protons and neutrons in an atom. Remember that both protons and neutrons have a mass of approximately 1 amu. Knowing the mass number and the atomic number of an atom therefore allows you to determine the number of neutrons present in that atom by subtraction:. Q: According to rutherford, where is the vast majority of the mass of an atom located? Choices: - the cytoplasm - the shell - the electrons - the nucleus A:
the nucleus