September 13th

Today's focus: Chemical and Physical Changes

Video: •http://studyjams.scholastic.com/studyjams/jams/science/matter/changes-of-matter.htm

Students were given an assessment on Chemical and physical changes after the video:

Name:_____________________  Date:________________________ Class Period:___   Score:___%

Study Jams Video Quiz (Chemical and Physical Changes)

1.        When does a physical change occur? ___

a.       When molecules combine to form a compound

b.      When a new element is created

c.       When the size, shape, or state of matter changes

d.      When elements combine to form a molecule

2.       Which type of change can be reversed? ___

a.       A physical change

b.      A chemical change

c.       A molecular change

d.      An electric charge

3.       Which of the following would cause the molecules in matter to change? ____

a.       A moderate climate

b.      Pressure

c.       Motion

d.      Extreme heat

4.       If a substance changes color, what has most likely happened? _____

a.       A pressurized change has taken place

b.      A chemical change has taken place

c.       A physical change has taken place

d.      Nothing has taken place

5.       Stepping on a bag of potato chips would cause which type of change? _____

a.       Mechanical

b.      Thermal

c.       Physical

d.      Chemical

6.       Which of the following is a clue that a chemical change has taken place? ____

a.       A gas forms when the change takes place

b.      The substance is smaller than it was before the change took place

c.       The substance has been shaken up

d.      The substance looks the same as it did before the change took place.

7.       What is the difference between a physical change and a chemical change? _____

a.       A physical change can only occur in liquids, and a chemical change can occur in a solid, a liquid, or in a gas.

b.      A physical change is when the size, shape, or state of matter changes, and a chemical change is when molecules of matter change to form a new substance.

c.       A physical change is when the molecules of matter change to form a new substance, and a chemical change is when the size, shape, or state of matter changes.

d.      A physical change can occur in a solid, liquid, or a gas, and a chemical change can only occur in a liquid.

After the Study Jams Video: Students completed a Lab Activity: A sticky situation

•https://www.cpet.ufl.edu/wp-content/uploads/2013/03/Differentiating-between-physical-and-chemical-changes.pdf