Rocks
Rocks formed from bits and pieces of eroded rocks are called ________________ rocks
sedimentary
In addition to being a protective layer, the magnetophere also produces beautiful _________
auroras
List all the forms of precipitation
rain, hail, sleet, snow
Which theory helped scientists understand how and where volcanoes erupt?
Theory of Plate Tectonics
What are lines connecting points of equal atmospheric pressure?
isobars
A rock that has changed due to heat or pressure is a what rock?
metamorphic
Excessive exposure to UV rays can cause what in humans?
sunburns, skin cancer
What happens when two air masses meet?
front forms
Which type of volcano is built by alternating layers of lava flows and ash flows?
Composite
A cold air mass tend to approach from what direction?
maritime polar
A rock that is often light enough to float in water is
pumice
The most abundant gas in the homosphere is
nitrogen
Which type of front involves two air masses where an existing air mass rises to make way for the incoming air mass?
Cold
Which type of volcano has steep, angled sides, throws blobs of lava in the air that fall as cinders, and is built over a short period of time?
cinder Cone
During the first half of the lunar month the moon is said to be ________
waxing
The individual rock particles, crystals, and sometimes fossils that combine to give a rock its texture are known as ____________
grains
Which atmospheric layer directly affects radio communications on Earth
Ionosphere
Wind blows from areas of ____________ pressure to areas of _____________ pressure
high, low
Which type of volcano spills thick lava which cools and piles up around the vent
lava dome
Weather instrument that measures the wind speed and shows direction on weather maps
compass rose
A type of rock that is so smooth and shiny that its called volcanic glass is ____________
obsidian
The sun is composed of
hydrogen
What property of wind does an anemometer measure?
speed
which type of volcano is currently resting, but could erupt sometime in the future?
dormant
When two air masses collide but neither is strong enough to push the other out of the way, what kind of front forms?
stationary