Direction: Draw a smiley face before the number if the concept of energy transformation is correct and sad face if it is not.
______31. Energy that is stored can be released and transformed to another form.
______32. All forms of energy need to be changed or converted into another forms.
______33. As energy is transformed, the by-product is always heat.
______34. The total amount of energy stays the same in any energy transformations. ​