When large amplitude sound vibrates the ear significantly, a results.

a) low pitch sound

b) high pitch sound

c) soft sound

d) loud sound

.) the observation by semmelweis that more mothers died of childbed fever when their doctors also worked in the morgue

the best answer for these questions would be:

1.            c. is smaller

2.            d) concrete operational

3.            b) interaction with the environment – the children interact with their environment can them learn more.

4.            a) parents who reason openly with children can limit a child’s cognitive ability.