1) what is the pressure that is exerted at a depth of 20 meters above sea level?
2) a child releases a balloon, which slowly rises to the sky,
if the balloon has a diameter of 20 cm when the child releases it, what is its diameter at a height of 1000m, 2000m and 5000m
suppose the balloon is very flexible and can ignore surface tension

no simpler subs form complex ones. synthesise = make

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.