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→About Light and Dark
===About Light and Dark===
: '''Light''' can be very bright or it can be very '''dark'''.
: '''Light''' travels in straight lines.
: '''Light''' comes from [[luminous]] objects and is [[reflected]] off non-luminous objects. [[The Sun]] can be seen because it is [[luminous]]. [[The Moon]] can be seen because it [[reflect]]s the '''light''' of [[The Sun]].
: When '''light''' is very bright it can hurt our eyes. '''Light''' from [[The Sun]] is very bright and we shouldn't look at [[The Sun]] because it can cause people to go blind.
: When there is not enough light to see we say it is '''dark'''. At night time it is very '''dark''' which is why it is hard to see.