Which of tge following is an example of a chemical change a. flour and sugar are sifted together into a measuring cup. b. chocolate squares are melted yi make a cake. c. the shell of an egg breaks when it is struck against a hard surface. d. a mixture of flour, sugar, eggs, and butter is baked to become a cake

The chemical bond connecting one nucleotide with the next one along the nucleic acid chain is called a

Clyde and marilyn are riding a roller coaster. during which section(s) of the track is their potential energy converted to kinetic energy? a. from point b to point c only b. from point b to point d only c. from point a to point b only d. from point a to point b and from point c to point d

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.