Humans have used rocks in the creation of tools and building materials.

Which civil rights act banned discrimination against any person based on race or color? 14th amendment 15th amendment civil rights act of 1964 voting rights act of 1965

For an actor, keeping his mind on will ultimately his performance.

What was piaget's explanation as to why preschool-age children in the preoperational stage make errors on tasks requiring conservation? a) preschool children's tendency toward centration prevents them from focusing on other relevant features of a situation b) preschool children have not yet developed numerical understanding; therefore, different amounts are meaningless c) preschool children's neural-visual network is not fully matured d) preschool children have not lived long enough and accrued enough experience to know the difference between quantities