Which of the following is true of iron? a. It has the highest electrical conductivity of any metal. b. It can exist in many alloys, usually with a carbon base. c. It is highly valuable, has symbolic meaning, and widely used. d. It is a durable metal and is commonly used for casting.

What happens to the composition of an atom to cause it to become positively or negatively charged?

Which statements about the two fossil images are correct? 1. cave bears are ancestors of plateosaurus. 2. plateosaurus were present on earth before ostracoderms. 3. ostracoderms were the first to die. 4. plateosaurus died after the ostracoderms. 5. cave bears are the oldest fossils.

What are the two main purposes of edgar allen poe’s, “the masque of the red death? ”