Nick is researching why baking powder is a common baking ingredient. he learns that baking powder contains tartaric acid and sodium hydrogen carbonate. he also learns that when water is added to cake ingredients, a reaction occurs. it causes bubbles to form that make the cake rise. what gas is in the bubbles, and why do they form? a. carbon dioxide gas forms because an acid and a carbonate react. b. carbon dioxide gas forms because an acid and a base react. c. hydrogen gas forms because an acid and a metal react. d. hydrogen gas forms because an acid and a base react.

Which of the following examples can cause gene flow between populations? a.an increase in predators to a population of zebra b.a volcanic eruption that kills half of a population of mice c.bird droppings that contain seeds from a different location d.a person that sprays a toxin on a group of mosquitoes

The eruption of a nearby volcano causes a prairie ecosystem to receive a lot less sunlight.which of these is the most likely effect on the ecosystem? a-an increase in biodiversity. b-an increase in immigration to the area. c-a decrease in available water. d-a decrease in plant growth.

Which statement best describes a typical difference that could be found between the "analysis" and "conclusion" sections of a lab report? a) only the "conclusion" describes errors that occurred during the experiment, and only the "analysis" section suggests further research.b) only the "analysis" section includes specific data comparisons, and only the "conclusion" section suggests further research.c) only the "analysis" section discusses whether the original hypothesis was supported, and both sections include graphs of data.d) only the "conclusion section discusses whether the original hypothesis was supported, and both sections suggest further research.(the answer is b i just took the test)