Q: Answer the following question given this paragraph: chlorine is added to an aqueous solution of bromide. iodine crystals are added to a solution of potassium bromide. Bromide is present in naturally occurring salt solutions called brines. Based on your answers, propose an effective method to remove bromide from brine. Q: Bromide is present in brines, which are naturally occurring solutions of what? A:

OPTIONS:
- iron
- calcium
- magnesium
- salt

A: salt

input: OPTIONS:
- they move slower
- they disintegrate
- they explode
- they move faster Now, answer this question: Answer the following question given this paragraph: Gases are compressible, meaning that when put under high pressure, the particles are forced closer to one another. This decreases the amount of empty space and reduces the volume of the gas. Gas volume is also affected by temperature. When a gas is heated, its molecules move faster and the gas expands. Because of the variation in gas volume due to pressure and temperature changes, the comparison of gas volumes must be done at one standard temperature and pressure. Standard temperature and pressure (STP) is defined as 0C (273.15 K) and 1 atm pressure. The molar volume of a gas is the volume of one mole of a gas at STP. At STP, one mole (6.02 10 23 representative particles) of any gas occupies a volume of 22.4 L ( Figure below ). Q: How do molecules react when a gas is heated? A:
A:
output: they move faster

Answer the following question given this paragraph: Reproduction Reproduction in prokaryotes is asexual and usually takes place by binary fission. Recall that the DNA of a prokaryote exists as a single, circular chromosome. Prokaryotes do not undergo mitosis. Rather the chromosome is replicated and the two resulting copies separate from one another, due to the growth of the cell. The prokaryote, now enlarged, is pinched inward at its equator and the two resulting cells, which are clones, separate. Binary fission does not provide an opportunity for genetic recombination or genetic diversity, but prokaryotes can share genes by three other mechanisms. Q: Prokaryotes divide via binary fission and do not undergo what process of cell division? A:

OPTIONS:
- prophase
- meiosis
- fusion
- mitosis

Answer: mitosis

Problem: OPTIONS:
- Solid
- tissue
- Metal
- fluid
Q: Answer the following question given this paragraph: Convection is the transfer of thermal energy by particles moving through a fluid. Particles transfer energy by moving from warmer to cooler areas. That's how energy is transferred in the soup in Figure above . Particles of soup near the bottom of the pot get hot first. They have more energy so they spread out and become less dense. With lower density, these particles rise to the top of the pot (see Figure below ). By the time they reach the top of the pot they have cooled off. They have less energy to move apart, so they become denser. With greater density, the particles sink to the bottom of the pot, and the cycle repeats. This loop of moving particles is called a convection current . Q: Convection is the transfer of thermal energy by particles moving through what? A:
Answer: fluid

Problem:OPTIONS:
- active energy
- radical energy
- stellar energy
- electrical energy

Answer the following question given this paragraph: Solar cells convert the energy in sunlight to electrical energy. Solar cells are also called photovoltaic (PV) cells because they use light ( photo- ) to produce voltage ( -voltaic ). Solar cells contain a material such as silicon that absorbs light energy. The energy knocks electrons loose so they can flow freely and produce a difference in electric potential energy, or voltage. The flow of electrons creates electric current. Solar cells have positive and negative contacts, like the terminals in chemical cells. If the contacts are connected with wire, current flows from the negative to positive contact. The Figure below and following URL show how a solar cell works. http://www. suntreksolar. com/solarElectricity/howCellsWork. asp. Q: Solar cells convert the energy in sunlight to what type of energy? A:
****
A: electrical energy

Problem:OPTIONS:
- micronutrients
- minor nutrients
- major nutrients
- macronutrients

Answer the following question given this paragraph: Q: Potassium, calcium, and magnesium are considered what kind of nutrients? A:
****
A:
macronutrients