Question

Solder is a silver metal used to hold pipes together. When the solder is heated, it melts and acts as a type of metal "glue." Mrs. Hanley heats a piece of solder until it melts between two pipes. What best identifies the point at which a physical change first takes place?

A)when the solder melts


B)when the solder cools down


C)when the solder is a soft metal


D)when the solder becomes solid again

Answer 1

A

Step-by-step explanation:

Answer 2

It is A because that’s the first thing that happens to it. She puts the solder in between the pipes at that point, it is solid. She then heats it up and it changes therefore that is the first change. Everything else happens after she heats it up. Hope this helps give me some points pls