useless trivia: What Word Means: A River In Russia And Latvia?

Questions

What are these: chrysolite, beryl, jasper, and tourmaline?

Name the nursery rhyme mother whos last name is that of a bird?

The energy which a body possesses by virtue of its motion is called ________.?

The force that brings moving bodies to a halt is _________.?

The pivot point of a lever is called the _________.?