Analyzing Relationships
Which type of relationship is shown in the passage?
O scientist to scientist
O scientist to invention
In the 1930s a telephone-company engineer named Karl
Jansky was trying to track down the cause of hissing
static in phone lines when he discovered something
strange. Radio energy from outer space was interfering
with the phone signals. After learning about Jansky's
discovery, a radio engineer named Grote Reber decided
to investigate.
-A Black Hole Is NOT a Hole,
Carolyn Cinami DeCristofano
invention to invention
invention to discovery
The answer is a
