Many substances can go through physical and chemical changes. which of the following is an example of a physical change? question 6 options: using heat and oxygen to burn wood using heat to scramble an egg mixing co2 , water, and sugar to form soda mixing baking soda with vinegar to form co2

What effect would average population growth have on land usage? a. urban use of land would rise to more than 30 percent of available land. b. industrial use of land would rise to more than 30 percent of available land. c. the percentage of available land used as cropland would stay the same. d. cropland would fall to about 10 percent of available land.