Which object is a compound machine?

After rain, water soaks into the ground and is added to the groundwater. this process is known as a. groundwater pollution. b. groundwater recharge. c. groundwater recycling. d. groundwater filtration.

We the people of the united states, in order to form a more perfect union, establish justice, insure domestic tranquility, provide for the common defence, promote the general welfare, and secure the blessings of liberty to ourselves and our posterity, do ordain and establish this constitution for the united states of america. according to the preamble which action represents an appropriate role for government

Carlo is wondering what causes plants to grow at different rates. carlo’s hypothesis is “plants will grow more when the day is longer.” what would be the difference between the test group and the control group in this experiment? type of soil type of plants exposure to sunlight method for measuring the growth