Answer the following question given this paragraph: The black line represents the straight path of the light itself. Along this path, there exists an electric field that will reach a maximum positive charge, slowly collapse to zero charge, and then expand to a maximum negative charge. Similarly, there is an changing magnetic field that oscillates from maximum north pole field to maximum south pole field. Along the path of the electromagnetic wave, these changing fields repeat, oscillating over and over again. However, the oscillating electric and magnetic fields demonstrate a weaving pattern that is not the way light travels. For an electromagnetic wave, the crests and troughs represent the oscillating fields, not the path of the light. Q: In an electromagnetic wave, what do the crests and troughs represent? Choices: - vibrating fields - ocean waves - particles fields - oscillating fields A:
oscillating fields
Answer the following question given this paragraph: Eukaryotic cells are cells that contain a nucleus. Q: Eukaryotic cells are cells that contain what? Choices: - inorganic matter - energy - pathogens - a nucleus A:
a nucleus
Q: Answer the following question given this paragraph: In this reaction, and are positively-charged cations, while and are negatively-charged anions. Double-replacement reactions generally occur between substances in aqueous solution. In order for a reaction to occur, one of the products is usually a solid precipitate, a gas, or a molecular compound such as water. Q: Double-replacement reactions generally occur between substances in what kind of solution? Choices: - solid - reactive - saline - aqueous A:
A: aqueous
Question: Answer the following question given this paragraph: They will all blend together. The dyes will move through the water until an even distribution is achieved. The process of moving from areas of high amounts to areas of low amounts is called diffusion. Q: The process of moving from areas of high amounts to areas of low amounts is called what? Choices: - transfer - deposition - filtration - diffusion A:
Answer: diffusion
*Question*
Answer the following question given this paragraph: The reaction is exothermic and thus the sign of the enthalpy change is negative. Q: What enthalpy change is observed in an exothermic reaction? Choices: - positive - no change - entropy - negative A:
**Answer**
negative
Q: Answer the following question given this paragraph: The direction of the force of gravity is in a straight line between two objects. It is always attractive. Q: The direction of the force of gravity is in what direction? Choices: - staggered line - curved line - fragmented line - straight line A:
A: straight line