Which instrument is used to measure the gain or loss of heat?
(a)manometer
(b)hydrometer
(c)calorimeter
(d)barometer
(e)voltmeter

What causes most sediment to wash or fall into a river

State one important difference between a physical change and a chemical change?

What is a main difference between a mixture and a pure substance? a mixture is only a liquid, but a pure substance can be in any state.a mixture looks the same throughout, but a pure substance does not.1 a mixture can vary in composition, but a pure substance has a set composlo a mixture can be made up of a single compound, but a pure substance car