Studying Space

What does a telescope collect from space and focus for closer observation?

• electromagnetic radiation

• magnetic particles

• lenses

• wavelengths

What is the imaginary sphere, created by scientists, that surrounds the Earth?

• a zenith

• a celestial sphere

• an astrolabe

• an ecliptic sphere

How did Hubble tell the universe was expanding?

• Galaxies were moving toward from each other

• Galaxies were getting bigger.

• Galaxies were moving away from each other.

• The number of galaxies were increasing.

Which of the following indicates the universe is expanding?

• a growing celestial sphere

• an increase in the number of constellations in the sky

• the discovery of other galaxies.

• observations of redshift

What is an advantage of a reflecting telescope?

• It can focus images perfectly.

• It can gather more light.

• It can detect distant objects.

• It can use very small lenses.

What makes up the electromagnetic spectrum?

• all colors of visible light

• all of the wavelengths of electromagnetic radiation

• all colors of invisible light

• microwaves, gamma rays, and x-rays

Where do scientists put telescopes to avoid interference from Earth's atmosphere?

• in deserts

• in valleys

• in space

• on mountain tops

What is an imaginary point directly about an observer's head?

• celestial sphere

• zenith

• right ascension

• altitude

Which of the following is NOT a type of electromagnetic radiation found on the electromagnetic spectrum?

• microwave

• visible light

• radio wave

• ocean wave

What does the Earth's atmosphere do to most types of electromagnetic radiation?

• blocks them

• absorbs them

• stretches them

• freezes them

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