7 questions
When does a physical change occur?
When molecules combine to form a compound
When a new element is created
When the size, shape or state of matter changes
When elements combine to create form a molecule
What type of change can be reversed?
A physical change
A chemical change
A molecular change
An electric change
Which of following would cause the molecules in matter to change?
A moderate climate
Pressure
Motion
Extreme heat
If a substance changes color, what has most likely happened?
A pressurized change has taken place
A chemical change has taken place
A physical change has taken place
Nothing has taken place
Stepping on a bag of potato chips would cause which type of change?
Mechanical
Thermal
Physical
Chemical
Which of the following is a clue that a chemical change has taken place?
A gas forms when change has taken place
The substance is smaller than it was before change took place
The substance has been shaken up
The substance looks the same as it did before the change took place
What is the difference between a physical change and a chemical change?
A physical change only occurs in liquids, and a chemical change can occur in a solid, liquid, or gas
A physical change is when size, shape, or state of matter changes, and a chemical change is when the molecules of matter change to form a new substance
A chemical change is when size, shape, or state of matter changes, and a physical change is when the molecules of matter change to form a new substance
A chemical change only occurs in liquids, and a physical change can occur in a solid, liquid, or gas