Answer:
A biologist discovered a young, four-legged animal. The animal had lungs, seemed to fertilize internally, and its outer surface was covered with scales. In which class of animals is the biologist likely to place the animal?
reptile
 
        
             
        
        
        
Answer:
Yes, the statement is true.
Explanation:
Different substances requires different amount of heat because every materials has its own specific heat capacity. Heat capacity is the amount of heat required to increase its temperature by 1 degree. Different substances have different types of bonds due to which they required different amount of heat energy for its breaking. 
For example, heat requirement of water is different from  glucose because they are made of different substances.
 
        
             
        
        
        
Answer:
a
Explanation:
photolysis means splitting of light for that it is important
 
        
                    
             
        
        
        
Answer: Yes, the students can conclude that a chemical reaction occurred because a new material of a different color formed on the bottom part of the metal strip.
Hope this helps!