GUESS THE WORD
A material that allows electricity to pass through it.
conductor
Scientists finally ______ the source of the problem after several experiments.
detected
Factories should reduce the ______ of harmful gases.
(emit)
emission
Roentgen noticed that the fluorescent ______ suddenly began to shine.
screen
Unable to be seen.
invisible
The force that pushes electricity through a circuit.
voltage
Doctors use X-rays to ______ broken bones.
locate
His job application ended in ______ so he got very upset. (reject)
rejection
Roentgen spent the last years of his life in poverty because of the economic ______.
crisis
To pass through something.
penetrate
The distance between one wave and the next.
wavelength
The child accidentally ______ a small coin, so his parents took him to the hospital.
swallowed
The hospital thanked her for her generous ______.
(donate)
donation
X-rays have much higher energy than visible ______.
light
A break in a bone.
fracture
Invisible rays made of electrons inside a vacuum tube.
cathode rays
Rubber is an excellent ______ because electricity cannot pass through it.
insulator
Unfortunately, the photograph was over-______ because too much light reached the film. (expose)
exposed
Although he became famous, Roentgen never looked for financial ______.
profit
Not proud or showing off your achievements.
modest
A form of energy that travels through space as waves.
electromagnetic radiation
The doctor warned that the knife had not reached the bone, only the soft ______.
tissue
Scientists must ______ their results before publishing them. (verification)
verify
The tube had to be kept under extremely low ______ for the experiment to work.
pressure
The number of waves that pass a point in a given time.
frequency