Read Aloud Test: Lesson 2 Chemical Change

2

Substances that are changed into something new are what?

2

Chemical reactions that require constant energy are what type?

4

_______  plays an important role in chemical reactions.  When you _______ this you will have more collisions, particles moving faster and higher energy. 

2

You have the same amounts of substances, one is granular and the other in powder.  When they undergo a chemical reaction the powder reacts faster because it has more _______.

2

When you mix a crystal and water together the temperature goes down. This is a ____________ reaction.

2

While mixing 2 liquid solutions you notice white particles at the bottom of the beaker. You know a chemical reaction took place because of the ______________.

2

What is actually happening in a chemical reaction?

2

__________ are represented by equations.

4

While hiking in the woods, you see a brown rotting apple lying on the ground. What changes in the physical properties of the apple are sign that a chemical reaction has occurred?

6

After learning about chemical reactions, Olivia investigated different kinds of chemical changes using substances she found in her kitchen so she could see these changes. Which of the following can occur when a chemical reaction takes place? Choose all that apply.

6

Identify each item as either chemical change or physical change.

Water to ice
color change
energy change
size change
precipitation
precipitate

Physical Change
Chemical change

2

Substances that are changed into something new are what?

Chemical reactions that require constant energy are what type?

When you mix a crystal and water together the temperature goes down. This is a ____________ reaction.

While mixing 2 liquid solutions you notice white particles at the bottom of the beaker. You know a chemical reaction took place because of the ______________.

What is actually happening in a chemical reaction?

While hiking in the woods, you see a brown rotting apple lying on the ground. What changes in the physical properties of the apple are sign that a chemical reaction has occurred?

After learning about chemical reactions, Olivia investigated different kinds of chemical changes using substances she found in her kitchen so she could see these changes. Which of the following can occur when a chemical reaction takes place? Choose all that apply.

Identify each item as either chemical change or physical change.

If something slows down a chemical reaction it is a(n) ______________.