The Earth
What is the molten rock in the Earth's mantle called?
Magma
What is a very durable artificial rock?
Concrete
What material is used in pencils instead of lead?
Graphite
The two types of weathering are...?
Physical weathering and Chemical weathering
What do we call the decaying plant and animal life in our soil?
Humus
Which rock smells like mud when it is wet?
Shale
A rocklike object that looks like a mudball on the outside but is filled with crystals on the inside is called...?
Geode
Scientists who study fossils are called...?
Paleontologists
An underground spring that shoots streams of boiling water and steam up into the air is called...?
A geyser
Which rock has often been used to make chalkboards?
Slate
All minerals form a special kind of solid called a...?
Crystal
Fossils that form when mud buries something and then quickly hardens around it are called...
Mold fossils
Oil in it's natural state is called...?
Crude Oil or Petroleum
Rare, beautiful minerals that are very hard but have not been polished are...?
Gemstones
The best conductor of electricity is...?
Silver
A radioactive metal used as a source of nuclear power is...?
Uranium
Most fossils were probably formed...?
during the Great Flood
A person who explores caves is a...?
Spelunker
The only metal that is a liquid at room-temperature is...?
Mercury
Plant and animal remains that have turned to stone are...?
Petrified fossils