Rock Basics
Rocks and minerals are natural materials that come from this planet.
Earth
A rock that reflects light can be described with this word
Shiny
We add a few drops of this to see whether a rock's color changes
Water
Some rocks form when hot melted rock does this
Cool and hardens
The dark material inside a pencil comes from this mineral
Graphite
These tiny natural materials are the building blocks that make up rocks
Minerals
A rock that does not reflect much light is described as this.
Dull
We can gently use a penny or paper clip to test this property
Hardness
Some rocks form when tiny pieces are pressed and stuck together over a long time. What are those pieces called?
Sediment
This mineral from the ocean or underground is sprinkled on food.
Salt
A person who studies rocks and Earth is called this
A geologist
A rock that feels bumpy instead of smooth has this texture.
Rough
If a penny leaves a mark, the rock is probably harder or softr than the penny?
Softer
This natural opening can erupt with lava, ash and gases.
A volcano
Quartz-rich sand is heated to make this clear material found in windows.
Glass
Melted rock underneath Earth's surface is called this.
Magma
This tool helps you see the tiny details in a rock
A magnifying glass
we gently feel a rock to discover this property
texture
True or False: Every rock forms in exactly the same way.
False
This soft mineral is used to make drywall or homes and schools.
Gypsum
When magma reaches Earth's surface, it is called this
Lava
Name two properties you could use to describe a rock
Color, size, texture, hardness, shine or weight.
Scientists carefully look, feel, test and record what they notice. This is called making an_________.
Observation
Rocks can change slowly over thousands or even millions of these.
Years
Cellphones contain many minerals. Name one metal or mineral that may be inside a cellphone
Copper, gold, lithium, cobalt, quartz, silver or graphite.