UIUC ATMS 120 Exam 2 With
Complete Solution
True or False: Lightning CAN strike in the same place twice. - ANSWER True
True or False: Lightning ALWAYS produces thunder. - ANSWER True
What is the average width and length of a lightning strike? - ANSWER 2-3 cm
wide, 5 km long
How many lightning strikes per second hit Earth? - ANSWER 100 strikes
What temperature does a lightning strike heat up to? - ANSWER 30,000° F
Number of lightning strikes per year in US? - ANSWER 20 to 30 million
What state is the "lightning capital" of the US? - ANSWER Florida
What is a conductor and what are some examples? - ANSWER Conductor is a
material that contains movable charges. Examples: Water, copper wire, etc.
What is an insulator and what are some examples? - ANSWER An insulator is
a material that resists moving charges. Examples: Air, glass, porcelain, etc.
Where are the positive charges within a cloud? - ANSWER Top of cloud
Where are the negative charges within a cloud? - ANSWER Base of cloud
Ingredient needed to produce lightning? - ANSWER Ice
Where is graupel located in a cloud and how are the charges placed within it?
- ANSWER Graupel is at top of cloud. Positive and negative charges are
scattered.
, Where are ice crystals located in a cloud and how are the charges placed
within them? - ANSWER Ice crystals are at bottom of cloud. Positive charges
on the inside, negative charges on the outside.
______ moves to top of cloud and gives ______ to ______ - ANSWER Ice crystal,
electrons, graupel
4 types of lightning strokes - ANSWER In cloud, cloud to cloud, cloud to air,
and cloud to ground
Stepped Leader - ANSWER Electrons come down from cloud searching for
path of least resistance to positive charge. Has fork-like pattern that positive
charges come up to meet.
Return Stroke - ANSWER Collision of electrons and protons from stepped
leader. The current travels back up and produces a bright flash, heating air to
30,000° F
Dart Leader - ANSWER Leftover electrons from cloud base come down the
open path, in search of positive charges.
Second Return Stroke - ANSWER Collision of electrons and protons from the
dart leader. Causes another bright flash.
Thunder - ANSWER Expanding air creates a pressure curve that pops, heating
air to 54,000°
How quickly does the sound of thunder travel? - ANSWER 1 mile per 5
seconds
First strike has ______ frequency and amplitude, with a ______ and ______ pitched
sound - ANSWER High, loud, high
Complete Solution
True or False: Lightning CAN strike in the same place twice. - ANSWER True
True or False: Lightning ALWAYS produces thunder. - ANSWER True
What is the average width and length of a lightning strike? - ANSWER 2-3 cm
wide, 5 km long
How many lightning strikes per second hit Earth? - ANSWER 100 strikes
What temperature does a lightning strike heat up to? - ANSWER 30,000° F
Number of lightning strikes per year in US? - ANSWER 20 to 30 million
What state is the "lightning capital" of the US? - ANSWER Florida
What is a conductor and what are some examples? - ANSWER Conductor is a
material that contains movable charges. Examples: Water, copper wire, etc.
What is an insulator and what are some examples? - ANSWER An insulator is
a material that resists moving charges. Examples: Air, glass, porcelain, etc.
Where are the positive charges within a cloud? - ANSWER Top of cloud
Where are the negative charges within a cloud? - ANSWER Base of cloud
Ingredient needed to produce lightning? - ANSWER Ice
Where is graupel located in a cloud and how are the charges placed within it?
- ANSWER Graupel is at top of cloud. Positive and negative charges are
scattered.
, Where are ice crystals located in a cloud and how are the charges placed
within them? - ANSWER Ice crystals are at bottom of cloud. Positive charges
on the inside, negative charges on the outside.
______ moves to top of cloud and gives ______ to ______ - ANSWER Ice crystal,
electrons, graupel
4 types of lightning strokes - ANSWER In cloud, cloud to cloud, cloud to air,
and cloud to ground
Stepped Leader - ANSWER Electrons come down from cloud searching for
path of least resistance to positive charge. Has fork-like pattern that positive
charges come up to meet.
Return Stroke - ANSWER Collision of electrons and protons from stepped
leader. The current travels back up and produces a bright flash, heating air to
30,000° F
Dart Leader - ANSWER Leftover electrons from cloud base come down the
open path, in search of positive charges.
Second Return Stroke - ANSWER Collision of electrons and protons from the
dart leader. Causes another bright flash.
Thunder - ANSWER Expanding air creates a pressure curve that pops, heating
air to 54,000°
How quickly does the sound of thunder travel? - ANSWER 1 mile per 5
seconds
First strike has ______ frequency and amplitude, with a ______ and ______ pitched
sound - ANSWER High, loud, high
