Which of these metals is least likely to be involved in chemical reactions?

a. iron
b. tin
c. gold
d. copper

Which answer tells the reason the earth’s climate is getting warmer? too many animals are becoming extinct. large glaciers are melting in antarctica. the earth is moving closer to the sun. driving cars gives off gases that trap heat in the atmosphere.

Which is an example of a reversible physical change?

One student said that the investigation was not valid (a fair test). write a plan for the investigation that includes improvements to the method and apparatus