Ruler
Diameter tools
a balance
gramsWHAT
a balance
they used wood tools and steel tools and rock or stone tools
a rock knif
hydrophone
You use a graduated cylinder to measure the volume of the rock with the water and the water without the rock
either use feet or meters. use a tape measure or a meter stick (yard stick)
They use tools and measure earth again with the help of scientific tools
safety measure
Hydrologist use water meters to measure the flow of the water