3. Alfred Wegener discovered that there are similar mountain ranges on both sides of the Atlantic Ocean. An example of this is the Appalachian Mountains that disappear off the

coast of Newfoundland and the mountains that are found in the British Isles. These

mountain ranges are similar in age and composition. This information helped Alfred

Wegener form his theory of -

a. Continental drift

b. Sea floor spreading

c. Glacial impact

d. Global warming

continental drift

Explanation:

c and d make no sense, and b is describing the sea floor expands and moves, so a is correct

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.

it is a solid

explanation: