Answer:
I think this is it...
Explanation:
When the particles are smaller, there is a larger surface area for the acid particles to attack. More of them collide with the carbonate and produce more gas faster. In the real experiments you do, you could change the size of the calcium carbonate chips by grinding them up.
Answer:
increased number of single person household, more working women, population growth
Stress is negative its not good
Answer:
I get my drinking water from:
A fountain at school
A well at home
Another source (a natural well at a near by mountain)
Explanation:
these are the main places I get water
