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Chapter 18.2 Review (8th)
Test Description: Telescopes
Instructions: Answer all questions to get your test result.
1) An instrument that gathers electromagnetic radiation from objects in space and concentrates it for better observation
A
Stethoscope
B
Periscope
C
Microscope
D
Telescope
2) The point where the rays of light that pass through a lens or that reflect from a mirror converge
A
Objective lens
B
Focal point
C
Optical telescope
D
Eyepiece
3) One lens which collects light and forms an image at the back of the telescope
A
Eyepiece
B
Radio telescope
C
Focal point
D
Objective lens
4) Why do astronomers put telescopes in space?
A
to avoid noise pollution
B
to avoid interference from the Earth’s atmosphere
C
to reduce air pollution
D
to get closer to objects in space
5) How does the atmosphere affect astronomical observations?
A
It blocks most electromagnetic radiation.
B
It does not affect astronomical observations.
C
It blocks all radio waves.
D
It focuses visible light.
6) An optical telescope is an instrument that
A
collects and focuses invisible light for closer observation.
B
collects visible light and breaks it apart.
C
collects and focuses visible light for closer observation.
D
collects invisible light and breaks it apart.
7) What is the electromagnetic spectrum made of?
A
magnetic metals
B
bands of heat
C
waves of gamma rays
D
all the wavelengths of electromagnetic radiation
8) Humans can see radiation from
A
infrared light to ultraviolet light.
B
red light to blue light.
C
infrared light.
D
ultraviolet light.
9) The simplest optical telescope contains
A
an objective lens and a lens in the eyepiece of the telescope.
B
two objective lenses.
C
an obtuse lens and a lens in the eyepiece of the telescope.
D
an objective lens and a mirror.
10) What is one advantage of reflecting telescopes?
A
They touch up images.
B
They focus perfect images.
C
They have two focal points.
D
They use smaller mirrors.
11) uses mirrors to gather and focus light
A
refracting telescope
B
reflecting telescope
C
telescope
D
electromagnetic spectrum
12) all of the frequencies or wavelengths of electromagnetic radiation
A
telescope
B
electromagnetic spectrum
C
reflecting telescope
D
refracting telescope
13) uses lenses to gather and focus light
A
telescope
B
refracting telescope
C
electromagnetic spectrum
D
reflecting telescope
*select an answer for all questions
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