Q: Answer the following question given this paragraph:      Q: What is the cause of existence of molecular solids and liquids?   A:
A: attractive forces

Q: Answer the following question given this paragraph:   Examples of machines that increase the distance over which force is applied are paddles and hammers. Figure below explains how these machines work. In each case, the machine increases the distance over which the force is applied, but it reduces the strength of the applied force.   Q: Paddles and hammers are examples of simple machines that increase the distance over which force is applied, while reducing what?   A:
A: strength

Q: Answer the following question given this paragraph:   Figure below shows a diagram of Mercury’s interior. Mercury is one of the densest planets. Scientists think that the interior contains a large core made mostly of melted iron. Mercury's core takes up about 42% of the planet's volume. Mercury's highly cratered surface is evidence that Mercury is not geologically active.   Q: What do scientist's believe mercury's core is mostly made of?   A:
A: melted iron

Q: Answer the following question given this paragraph:   The kidneys play many vital roles in homeostasis . They work with many other organ systems to do this. For example, they work with the circulatory system to filter blood, and with the urinary system to remove wastes.   Q: The kidneys work with the urinary system to remove what?   A:
