input with options: Answer the following question given this paragraph: Summary The atoms in chemical compounds are held together by attractive electrostatic interactions known as chemical bonds. Ionic compounds contain positively and negatively charged ions in a ratio that results in an overall charge of zero. The ions are held together in a regular spatial arrangement by electrostatic forces. Mostcovalent compounds consist of molecules, groups of atoms in which one or more pairs of electrons are shared by at least two atoms to form a covalent bond. The atoms in molecules are held together by the electrostatic attractionbetween the positively charged nuclei of the bonded atoms and the negatively charged electrons shared by the nuclei. The molecular formula of a covalent compound gives the types and numbers of atoms present. Compounds that contain predominantly carbon and hydrogen are called organic compounds, whereas compounds that consist primarily of elements other than carbon and hydrogen areinorganic compounds. Diatomic molecules contain two atoms, andpolyatomic molecules contain more than two. A structural formula indicates the composition and approximate structure and shape of a molecule. Single bonds, double bonds, and triple bonds are covalent bonds in which one, two, and three pairs of electrons, respectively, are shared between two Saylor URL: http://www. saylor. org/books. Q: What kind of compounds contain positively and negatively charged ions in a ratio that results in an overall charge of zero? A:
OPTIONS:
- neutral compounds
- zero charged compunds
- zeronic ions
- ionic compounds
output: ionic compounds

Q: Answer the following question given this paragraph: This picture shows a thick layer of smog and dust over a very polluted city (Singapore). Smog in the air is a serious health hazard for people living in many big cities around the globe. Smog is one example of air pollution. Q: Smog is one example of what type of pollution? A:

OPTIONS:
- light
- energy
- sound
- air

A: air

input: OPTIONS:
- inheritance
- asexual reproduction
- meiosis
- crossing-over Now, answer this question: Answer the following question given this paragraph: When homologous chromosomes pair up during meiosis I, crossing-over can occur. Crossing-over is the exchange of genetic material between non-sister chromatids of homologous chromosomes. It results in new combinations of genes on each chromosome. Q: What is the term for the exchange of genetic material between non-sister chromatids of homologous chromosomes? A:
A:
output: crossing-over

Answer the following question given this paragraph: A scientist is always trying to find the truth and discover new truths. How can you think like a scientist? Thinking like a scientist is based on asking and answering questions. Though you may not know it, you do this all day long. Scientists ask questions, and then make detailed observations to try to ask more specific questions and develop a hypothesis . They may design and perform an experiment to try to answer their question and test their hypothesis. From the results of their experiment, scientists draw conclusions . A conclusion describes what the evidence tells the scientist. Q: Scientists ask questions, and then make detailed observations to try to ask more specific questions, in order to develop what? A:

OPTIONS:
- Tests
- suggests
- theories
- hypothesis

Answer: hypothesis

Problem: OPTIONS:
- one
- four
- two
- three
Q: Answer the following question given this paragraph: Carbon can form single, double, or even triple bonds with other carbon atoms. In a single bond, two carbon atoms share one pair of electrons. In a double bond, they share two pairs of electrons, and in a triple bond they share three pairs of electrons. Examples of compounds with these types of bonds are represented by the structural formulas in the Figure below . Q: In a carbon triple bond, how many pairs of electrons are shared? A:
Answer: three

Answer the following question given this paragraph: The various emissions will differ considerably in their ability to go through matter, known as their penetrating ability . The -particle has the least penetrating power since it is the largest and slowest emission. It can be blocked by a sheet of paper or a human hand. Beta particles are more penetrating than alpha particles, but can be stopped by a thin sheet of aluminum. Of the three basic types of emissions, gamma particle are the most penetrating. A thick lead shield is required to stop gamma emissions. Positrons represent a special case in that they annihilate when they come in contact with electrons. The collision of a positron and an electron results in the formation of two gamma emissions that go 180 degrees away from each other. Q: Of the three basic types of radioactive emissions, what particle is the most penetrating? A:

OPTIONS:
- neutron
- alpha
- beta
- gamma

Answer:
gamma