Which solid has an infinite number of planes of symmetry?

Use your vocabulary words to complete the sentences below. more of the world's population is now concentrated in heavily populated urban areas known as a this is quite a contrast from the past when or native groups were either farmers or — hunters and gatherers who moved between places in search of food. advanced technology has led to the integration of world economics and cultures, in the world's more developed countries. this integration requires , the responsible use and management of natural resources.

What causes the cyclical changes in the appearance of the moon?

What would be the distance of all the planets to the sun in astronomical units?