input: OPTIONS:
- displace
- isolate
- decompose
- ionize Now, answer this question: Answer the following question given this paragraph: The Van de Graaff Generator Van de Graaff generators (or Van de Graaffs) are not only spectacular devices used to demonstrate high voltage due to static electricitythey are also used for serious research. The first was built by Robert Van de Graaff in 1931 (based on original suggestions by Lord Kelvin) for use in nuclear physics research. Figure 18.38 shows a schematic of a large research version. Van de Graaffs utilize both smooth and pointed surfaces, and conductors and insulators to generate large static charges and, hence, large voltages. A very large excess charge can be deposited on the sphere, because it moves quickly to the outer surface. Practical limits arise because the large electric fields polarize and eventually ionize surrounding materials, creating free charges that neutralize excess charge or allow it to escape. Nevertheless, voltages of 15 million volts are well within practical limits. Q: Practical limits of van de graaff generators arise because the large electric fields polarize and eventually do what to surrounding materials? A:
A:
output: ionize

Answer the following question given this paragraph: The hot core warms the base of the mantle, which creates convection currents in the mantle. Q: What warms the base of the mantle creating convection currents there? A:

OPTIONS:
- mantle soil
- the hot regenerate
- molten lava
- the hot core

Answer: the hot core

Problem: OPTIONS:
- halogens
- fillings
- compounds
- amalgams
Q: Answer the following question given this paragraph: Alloys that are mostly composed of mercury are known as amalgams . Amalgams often have special properties that stem from the fact that mercury exists as a liquid at room temperature. As a result, metal amalgams are used for a variety of purposes, including dentistry and the extraction of other pure metals such as gold. Q: What are alloys that are mostly composed of mercury known as? A:
Answer: amalgams

Problem:OPTIONS:
- white blood cells
- the digestive system
- pores
- red blood cells

Answer the following question given this paragraph: All the cells of your body need oxygen, which they get from red blood cells. Red blood cells, in turn, get oxygen in the lungs. The lungs are the main organs of the respiratory system. The respiratory system is the body system that exchanges gases with the outside air. It brings air containing oxygen into the body for the cells. It also releases carbon dioxide from the cells into the air. Q: Where do the cells in your body get oxygen from? A:
****
A: red blood cells

Answer the following question given this paragraph: Freezing is the process in which a liquid changes to a solid. It occurs when a liquid cools to a point at which its particles no longer have enough energy to overcome the force of attraction between them. Q: What is the process in which a liquid changes to a solid? A:
OPTIONS:
- condensation
- boiling
- melting
- freezing
freezing

Answer the following question given this paragraph: A liquid that can interact with glass displays the property of adhesion . The attraction of the glass to the molecules is stronger than the attraction of the liquid molecules to each other. The liquid molecules are pulled up due to their stronger attraction to the glass. Water is one liquid that displays this property. Q: What property does liquid display when it interacts with glass? A:
OPTIONS:
- property of repulsion
- property of diffusion
- property of oxidize
- property of adhesion

Answer:
property of adhesion