Answer:
Basándose en las propiedades, los científicos serían menos propensos a utilizar la tiza como material de construcción porque...
el color es demasiado claro.
no es magnética.
es demasiado frágil. 
no refleja la luz.
      2.   El cobre es más probable que se utilice como cable porque ....
Conduce el calor
Conduce la electricidad
Es flexible 
Todo lo anterior 
      3.  Vuelves de la comida a la clase de ciencias y hay dos líquidos transparentes en tu
escritorio. ¿Cuál es la mejor manera de determinar de qué líquidos se trata? 
Probarlos     
Tocar con los dedos desnudos    
Hervirlo         
Arrastrar un imán a través de él
 4.  Explica por qué tu opción de respuesta en #3 es la 
 
        
             
        
        
        
The correct answer among the choices provided is the fourth option. Personal testimony was used by the speaker to prove his point. The speaker talked about his experiences on how Britain tried to stop the war in Europe. He is credible since he was a Cabinet member during that time.
 
        
                    
             
        
        
        
  <span>A simple sentence (called an independent clause), includes a verb and noun. 
Example: The boy fell (verb: fell, noun: boy) 
Example: In the tub, the boy fell on his bottom. (verb: fell, noun: boy) 
Example: The dog barked. 
Example The dog barked at the cat last night. 
Example: This question is odd. 
Compound sentences include two independent clauses but doesn't require a dependent clause, and the independent clauses are connected using a conjunction (but), or punctuation like a semi colon (;) or comma (,). 
Example: My friend invited me to the game but my parents didn't let me go. (2 clauses: invited to a game, parents didn't let him go. Conjunction: "but") 
Example: I have to stay up all night to finish this, my meeting is first thing in the morning. (2 clauses: stay up all night, meeting in the morning. Punctuation is a comma).</span>