A lesson at the Planetarium

Light pollution is caused by...

• A. unnecessary use of artificial light.

• B. use of intense natural light.

• C. the Full Moon.

Light pollution interferes with...

• satellite navigation.

• the launching of space rockets.

• astronomical research.

Long exposure to artificial light contributes to...

• nightmares.

• sleep disorders.

• skin problems.

The ......., or Polaris, is the brightest star in the constellation Ursa Minor, or the Little Dipper.

• East Star

• South Star

• North Star

The Constellations visible from the North Hemisphere were named after characters in ........ mythology.

• Greek

• Norwegian

• Turkish

The three largest northern constellations are Hydra (the sea serpent), Virgo (the maiden) and ........ (the Big Bear).

• Taurus

• Orion

• Ursa Major

Entering the interior of a .......... allows you to see the translucent cells where photosynthesis takes place.

• flower

• leaf

• trunk

What is needed for photosynthesis?

• Air.

• Water.

• Light.

Chrolophyll is a plant ......... that absorbs light from the sun in the blue and red portions of the visible light spectrum.

• pigment

• membrane

• molecule

Chemical ....... is stored in special molecules inside the plant and then is used to conduct all the processes of life.

• fluid

• dust

• energy