Which of the following summarizes the law of conservation of mass when dealing with a chemical change?
a. the total mass of the reactants is greater than the total mass of the products
b. the total mass of reactants is less than the total amount of the products.
c. the total mass of the reactants equals the total mass of the products.
d. matter can’t change form.

9. the history of life on earth is recorded in

Describe the relationship and movement between temperature and density in a convection cell. make sure you identify the direction of travel

For the strategies below, decide whether they are best described as demand-side solutions or supply-side solutions to meeting human needs for fresh water. remember that a demand-side solution reduces demand for fresh water, whereas a supply-side solution increases the supply of fresh water. (a) damming a river to create a reservoir (b) desalinating seawater (c) a nation invading a neighboring country to access their rivers (d) raising water prices for consumers and businesses (e) providing tax breaks for companies that use less water (f) replacing inefficient irrigation with more-efficient drip irrigation to grow crops (g) requiring low-flow showerheads in all new homes