Under pressure
What do we call a solid made by the natural activities of earth?
Mineral
What do we call a solid where atoms repeat in a regular 3D pattern.
Crystal
What is a solid object made up of mineral grains?
Rock
What mineral is known as “fool’s gold”?
Pyrite
What do we call a scientist who studies rocks?
A geologist.
What mineral is used to season and preserve food?
Salt (or Halite)
True or False: All gems are minerals.
False - some come from plants/animals
What do we call the hollow rock lined with crystals inside?
Geode
What mineral is pencil “lead” made of?
Graphite
What is the hardest natural mineral known on Earth?
Diamond
Name one way from the video that minerals can form.
From lava cooling or water dripping in caves.
What is a sweet edible crystal that Americans eat more than 130 pounds of each year?
Sugar
Name an example of a rock from the video where you can see the different grains.
Granite or Limestone
What bright blue mineral was used for early cave paintings and is featured in Minecraft?
Lapis lazuli
What do we call melted rock inside the Earth?
Magma
What two minerals are made of carbon but look different because their atoms are arranged differently?
Diamond and graphite
Why do gem cutters add flat faces to gemstones?
To catch and scatter light.
What is the continuous process in which rocks are created, destroyed, and changed from one type to another over long periods of time?
The rock cycle
What shiny black volcanic glass can be used to make sharp tools?
Obsidian
What is the name of fossilized tree resin?
Amber
Pyrite (fools gold) is made what 2 minerals?
Iron and Sulfur
What is the system that ranks the relative scratch resistance of 10 minerals on a scale from 1 (softest) to 10 (hardest)
The Mohs Hardness Scale
What do we call the flat surfaces on crystals?
Faces
Which gemstone is a purple variety of quartz?
Amethyst
How many known minerals are there? The team that is closest gets the point.
6,145