List in chronological order, and very briefly describe (1 sentence each), four phases in the life cycle of the sun. begin with the sun's birth and end with the sun's death.

the temperature and the pressure affect solubility. temperature affects by changing the properties of the solvent. the increase in pressure increases solubility, the decrease in pressure decreases solubility.

see earlier

conservation of mass

mass before something happens = mass afterwards

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.