2nd Grade Science › Changes Caused by Heating and Cooling
Becky says some changes caused by heating cannot be reversed. Maddy says all changes can be reversed. Their mother cooked hashbrowns for breakfast. Using this example, which sister is correct, Becky or Maddy, and why?
I melted a crayon and then put the crayon in the refrigerator, and it did not form back into the crayon shape, just a hard pile of colored wax. I did this multiple times, and it always happened the same way. I think heating can be reversed. This is an argument based on evidence.
Will says some changes caused by heating cannot be reversed. Angelo says some changes can be reversed.
Their father takes a popsicle out of the freezer and sets it on the counter. The popsicle begins to melt. He gets a call and puts it back into the freezer.
Using this example who is correct, Will or Angelo, and why?
Which statement is constructed using evidence?
An example of a change caused by heating or cooling that can be reversed would be the melting of a candy bar and then putting it into the refrigerator to reset the chocolate.
Which of these photos demonstrates a change from heating or cooling that cannot be reversed?
Which of these photos demonstrates a change from heating or cooling that cannot be reversed?
Will says some changes caused by heating cannot be reversed. Angelo says some changes can be reversed.
Their father takes a popsicle out of the freezer and sets it on the counter. The popsicle begins to melt. He gets a call and puts it back into the freezer.
Using this example who is correct, Will or Angelo, and why?
I melted a crayon and then put the crayon in the refrigerator, and it did not form back into the crayon shape, just a hard pile of colored wax. I did this multiple times, and it always happened the same way. I think heating can be reversed. This is an argument based on evidence.
Which statement is constructed using evidence?