Q: Answer the following question given this paragraph: From left to right across the periodic table, each element has one more proton than the element to its left. Because atoms are always electrically neutral, for each added proton, one electron is also added. Electrons are added first to the lowest energy level possible until that level is full. Only then are electrons added to the next higher energy level. Q: Because atoms are always electrically neutral, for each added proton, one of what is also added? A:

OPTIONS:
- ion
- quark
- neutron
- electron

A: electron

input: OPTIONS:
- gases
- seeds
- oils
- solids Now, answer this question: Answer the following question given this paragraph: The melting point of a substance is the temperature that separates a solid and a liquid. The boiling point of a substance is the temperature that separates a liquid and a gas. What accounts for this variability? Why do some substances become liquids at very low temperatures, while others require very high temperatures before they become liquids? It all depends on the strength of the intermolecular interactions between the particles of substances. (Although ionic compounds are not composed of discrete molecules, we will still use the term intermolecular to include interactions between the ions in such compounds. ) Substances that experience strong intermolecular interactions require higher temperatures to become liquids and, finally, gases. Substances that experience weak intermolecular interactions do not need much energy (as measured by Saylor URL: http://www. saylor. org/books. Q: Melting points are temperatures that are high enough to separate liquids from which substances? A:
A:
output: solids

Answer the following question given this paragraph: Q: Further transformation occurs during organogenesis, the formation of what? A:

OPTIONS:
- arteries
- muscles
- bones
- organs

Answer: organs

Problem: OPTIONS:
- ions or hormones
- acids and bases
- enzymes and acids
- solid ions or molecules
Q: Answer the following question given this paragraph: Motion of water molecules helps break up interactions between solid ions or molecules. Q: Motion of water molecules helps break up interactions between what? A:
Answer: solid ions or molecules

Problem:OPTIONS:
- ultraviolet
- light
- smoke
- heat

Answer the following question given this paragraph: A camp fire is an example of basic thermochemistry. The reaction is initiated by the application of heat from a match. The reaction converting wood to carbon dioxide and water (among other things) continues, releasing heat energy in the process. This heat energy can then be used to cook food, roast marshmallows, or just keep warm when it's cold outside. Q: What kind of energy is released when the thermochemical reaction of a campfire converts wood to carbon dioxide and water? A:
****
A: heat

Problem:OPTIONS:
- large holes
- light holes
- star holes
- black holes

Answer the following question given this paragraph: Black holes Black holes are objects having such large gravitational fields that things can fall in, but nothing, not even light, can escape. Bodies, like the Earth or the Sun, have what is called an escape velocity. If an object moves straight up from the body, starting at the escape velocity, it will just be able to escape the gravity of the body. The greater the acceleration of gravity on the body, the greater is the escape velocity. As long ago as the late 1700s, it was proposed that if the escape velocity is greater than the speed of light, then light cannot escape. Simon Laplace (17491827), the French astronomer and mathematician, even incorporated this idea of a dark star into his writings. But the idea was dropped after Young's double slit experiment showed light to be a wave. For some time, light was thought not to have particle characteristics and, thus, could not be acted upon by gravity. The idea of a black hole was very quickly reincarnated in 1916 after Einstein's theory of general relativity was published. It is now thought that black holes can form in the supernova collapse of a massive star, forming an object perhaps 10 km across and having a mass greater than that of our Sun. It is interesting that several prominent physicists who worked on the concept, including Einstein, firmly believed that nature would find a way to prohibit such objects. Black holes are difficult to observe directly, because they are small and no light comes directly from them. In fact, no light comes from inside the event horizon, which is defined to be at a distance from the object at which the escape velocity is exactly the speed of light. The radius of the event horizon is known as the Schwarzschild radius R S and is given by. Q: Not even light can escape from what extremely dense object sometimes found in deep space? A:
****
A:
black holes