Rock Types
What is the sofest rock on Earth?
Talc
What is viscosity?
Thickness/Resistance of a liquid to flow
The denser and thinner of the two crust/plate types are?
Oceanic
What is a mineral?
a solid inorganic substance of natural occurrence
What is a natural disaster?
a natural storm like event that causes great damage
What percent of the Earth is covered with water?
about 70%
How are sedimentary rocks formed?
wethering and erosion
How is lava different from magma?
Lava is above ground and magma is below ground
What is Plate Tectonics?
A theory where Earth's crust is broken into sections that float over the mantle
What does Cleavage mean?
some sides appear smooth-cut in particular directions
List at least 3 natural disasters.
Floods, hurricanes, tornadoes, volcanic eruptions, earthquakes, tsunamis, sinkholes, avalanches, landslides, limnic eruptions, blizzards, cyclones, droughts, thunderstorms, hailstorms, heat waves, solar flares, storms, wildfires
How long does it take Earth to revolve around the Sun?
365 days
What are the 3 rock types?
Sedimentary, igneous, and metamorphic.
Which type of volcano is the simplest?
Cinder Cone
Two plates are colliding; what boundary is this?
Convergent
How many naturally occurring minerals are there?
Over 4,000
Hurricanes rotate in which direction?
Counter-clockwise
what is the most common natural disaster?
Floods
What rocks come from lava?
Igneous
Which of the types of magma forms a shield volcano?
Basaltic
Name of a former supercontinent?
Pangea
What is the most common mineral?
Quartz
What tool is used to measure hurricane wind speed?
Saffir-Simpson Hurricane Wind Scale
What is the largest mountain range on Earth?
Mid-ocean ridge
What is the hardest rock?
Diamond
what is the Ring of Fire?
A region where most volcanoes and earthquakes occur
What Scientist proposed continental drift?
Alfred Wegener
How many properties of minerals are there?
7 properties
What are the most dangerous Natural Disasters?
Earthquakes and Tsunamis
What is the temperature of the Earth's core?
about 9,000 degrees