Jimmy and Andrew are playing in the pool. Jimmy bobs up and down in the water, and Andrew bobs up and down twice as fast. a. Compare the wavelengths and frequencies for the two sets of waves.

b. Which wave property is the same for both sets of waves?

conduction, convection, radiation

t = 1/400 h   ⇔ 0.0025 h ⇔ 9s ⇔ 0.15 m

any of the answers are correct.

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.