What was pangaea? explain your answer

The earliest form of the connected continents.

Explanation:

Pangaea refers to the ancient connection of all the continents before the movement of tectonic plates created the 7 continents we have today. It gives us the diversity we have today, as early life could travel across lands that are no longer connected, allowing the spark of life to set aflame the whole earth rather than the orgin spot of Northern Africa.

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answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e