help???? im not really sure about my answers for this.?

Question

1.Suppose the pebble is not completely covered with water, how would this affect the calculated density
2. What is the standard density of water? Describe the meaning of the said standard with corresponding meaning of the units used.

Answer 1

1. Density of what? water or the pebble?
2. "standard" is at 1 atm and room T about 25degree C. So the standard density of water is 1g/ml