If it's trembling uncontrollably, or hiding under the blankets, it's probably a stressed syllable. Okay, serious answer. A stressed syllable is a syllable that has emphasis within a word (or within a line of poetry). So the best way to tell is to say the word in an overly dramatic way, choosing different syllables to emphasize. For example, let's say we have the word emphasize, and we want to figure out which syllable is stressed.
Tidal islands (2) are a type of continental island where land connecting the island to the mainland has not completely eroded, but is underwater at high tide. The famous island of Mont Saint-Michel, France is an example of a tidal island.
A continent is one of several large areas of land on Earth, which are identified by convention rather than any strict criteria. The specific areas of land vary, but seven areas are commonly reckoned as continents - they are, in order of size, Asia, Africa, North America, South America, Antarctica, Europe and Australia. An island or isle is any piece of land that is completely surrounded by water. Very small islands such as emergent land features on atolls are called islets.