Is it true or false that landslides occur when earth materials that are no longer held by friction move down a slope with the of gravity?

What material does not melt at any temperature

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

What relationship exists between an enzyme and a catalyst?