Which of the following would be the least reliable source of information?
science textbook
government internet site
weekly news magazine
reference journal at the library

The reliable sources are those which have some authenticity. The authenticity is based on data and its analysis or some research or some experiments.

The science text books are based on some reference books / journals and are published if authored by an authentic person (with experience and knowledge)

government internet sites are based on facts / analysis so are considered reliable, generally

reference journal are most reliable as those are internationally reviewed and published from a well repute publisher.

However weekly news magazines are just source of information and may have a different view or content. So these can be considered to be least reliable.

the tides are influenced by both the moon and the sun, it's easy to see that when the sun lines up with the moon and the earth, as during a new moon or full moon, the tidal effect is increased. these are known as spring tides, named not for the season, but for the fact that the water "springs" higher than normal. on the other hand, if the sun and the moon are 90 degrees apart in relation to an observer on earth as during the first quarter moon or third quarter moon, then high tides are not as high as they normally would be. this is because despite its greater distance, the sun's mass allows it to exert enough gravitational force on the oceans that it can negate some of the effects of the moon's pull. this phenomenon of lower high tides is called a neap tide. if you need more information on this topic visit moonconnection.com.