Answer the following question given this paragraph: The physical state and properties of a particular compound depend in large part on the type of chemical bonding it displays. Molecular compounds , sometimes called covalent compounds, display a wide range of physical properties due to the different types of intermolecular attractions such as different kinds of polar interactions. The melting and boiling points of molecular compounds are generally quite low compared to those of ionic compounds . This is because the energy required to disrupt the intermolecular forces between molecules is far less than the energy required to break the ionic bonds in a crystalline ionic compound. Since molecular compounds are composed of neutral molecules, their electrical conductivity is generally quite poor, whether in the solid or liquid state. Ionic compounds do not conduct electricity in the solid state because of their rigid structure, but conduct well when either molten or dissolved into a solution. The water solubility of molecular compounds is variable and depends primarily on the type of intermolecular forces involved. Substances that exhibit hydrogen bonding or dipole-dipole forces are generally water soluble, whereas those that exhibit only London dispersion forces are generally insoluble. Most, but not all, ionic compounds are quite soluble in water. Table below summarizes some of the differences between ionic and molecular compounds. Q: What is another name for molecular compounds? Choices: - phenotype compounds - oxidized compounds - synthetic compounds - covalent compounds A:
covalent compounds
Answer the following question given this paragraph: Mass measures the amount of matter in a substance or an object. The basic SI unit for mass is the kilogram (kg). Q: What is the the basic si unit for mass? Choices: - pound - volume - density - kilogram (kg) A:
kilogram (kg)
Q: Answer the following question given this paragraph: Ecological pyramids can demonstrate the decrease in energy, biomass or numbers within an ecosystem. Energy pyramids are discussed at http://www. youtube. com/watch?v=8T2nEMzk6_E (1:44). Q: What can demonstrate the decrease in energy, biomass or numbers within an ecosystem? Choices: - biomes - spontaneous mutation - food chains - ecological pyramids A:
A: ecological pyramids
Question: Answer the following question given this paragraph: Q: All living things need air and this to survive? Choices: - stimuli - habitat - ecosystem - water A:
Answer: water
*Question*
Answer the following question given this paragraph: Behind each release of gas is an army of gut bacteria undergoing some crazy biochemistry. These bacteria break down the remains of digested food through fermentation, creating gas in the process. Learn what these bacteria have in common with beer brewing at http://youtu. be/R1kxajH629A?list=PLzMhsCgGKd1hoofiKuifwy6qRXZs7NG6a . Q: Bacteria break down the remains of digested food through a processed called what? Choices: - regulation - oxidation - synthesis - fermentation A:
**Answer**
fermentation
(Q).
Answer the following question given this paragraph: The drummer in Figure below is hitting the drumheads with drumsticks. This causes the drumheads to vibrate. The vibrations pass to surrounding air particles and then from one air particle to another in a wave of energy called sound energy . We hear sound when the sound waves reach our ears. Sound energy can travel through air, water, and other substances, but not through empty space. That's because the energy needs particles of matter to pass it on. Q: What energy, produced by vibrations, cannot travel through empty space? Choices: - light - heat - plasma - sound A:
(A).
sound