2. A plant growing in response to the sunlight. A. Gravitropism
B. Phototropism
C. Thigmotropism
D. Hydrotropism

Two solids are mixed in a flask and stirred. after a few minutes, the flask becomes cold. which of the following best describes this reaction? a. an exothermic reaction b. a combustion reaction c. an endothermic reaction d. a decomposition reaction

Which of the following is a property of nonmetals? a.nonmetals are ductile. b.nonmetals have a shiny luster. c.nonmetals have high density. d.nonmetals are nonconductors.

Which part of the mantle is similar to the crust ? (science)