What makes an element the same as another element

The climate of the continental united states is generally 1. tropical 2. temperate 3. arctic 4. highland

Which description best characterizes the motion of particles in a solid?

The gulf stream is a warm water current that flows away from the equator to northern europe. witch of these does it cause. a. crashes of warm and cool water in the ocean b.colder climates near the equator c.large waves on the cost of europe d.warm climates in northern europe