Answer:
B) a substance's color and odor changed        Explanation: A signal that a chemical change has occurred is when its odor (its smell) or its appearance has changed.
 
        
                    
             
        
        
        
Drill cores from the ocean floor were dated and found to be very young compared to the age of the earth. This means the crust had to be formed recently, which can be explained by creation of crust at a spreading center. 
 
        
                    
             
        
        
        
THE ANSWER IS I.ASTEROIDS   II.COMETS   III. METEOROIDS   IV. PLANETS PLZ MARK BRAINLISEST HOPE I HELPED THX
 
        
                    
             
        
        
        
 Sodium is not a macromolecule hence it does not contain any calories.
<h3>Does sodium contain calories?</h3>
The term  calorie is a unit of energy. We often us the term to describe the amount of energy that is contained in each kind of food. The higher the calories, the greater the energy that the food contains.
Calories can only be contained by macromolecules such as proteins, carbohydrates, fats etc. Sodium is not a macromolecule hence it does not contain any calories at all hence the classmate is wrong.
Learn kore about calories:brainly.com/question/22374134
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