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Number 6 is add up all the numbers, then divide by how many numbers there are. In other words it is the sum divided by the count.
7. You should use a line graph when your need to track changes over short and long periods of time
8. The dependent variable goes on the y axis
Answer:
About composition of water and organisms that lives there.
Explanation:
scientists might be able to learn about the composition of seawater that was present millions of years ago if we study those stones that comes in contact to that ancient seawater because the traces of particles still present on it. This study provides valuable information about ancient times of earth and its natural resources. These rocks also provides animals that were present in that sea water at that time.
A warm air does always rise and cold air falls
