Physical and Chemical Change

Crystallisation is a ____________________

• Chemical Change

• Physical Change

• None of these

• Both of these

Rusting of iron requires

• only oxygen

• only water

• both air and water

• none of these

Lime water turns milky when

• carbon dioxide gas is passed through it

• oxygen gas is passed through it

• hydrogen gas is passed through it

• none of these

The chemical name of baking soda is (a)  

The process of depositing a thin layer of zinc on iron objects is called (a)  

The presence of (a)   in water makes the process of rust formation on ships faster.

Which of the following is NOT an example of a physical change?

• crumpling paper

• sharpening a pencil

• clothes shrinking

• sour milk

Tags

NGSS.MS-PS1-2

What does it mean when there is a physical change?

• Matter has change from one substance into another.

• Matter has change on the molecular level

• A new substance has been formed.

• Matter has changed size, shape or form.

Tags

NGSS.MS-PS1-4

What is an example of a physical change that happens inside your body?

• Food being broken down by acids in your stomach.

• Food being broken down into small pieces by your teeth.

• Food being moved to your stomach.

• Water being absorbed inside your large intestine.

Tags

NGSS.5-PS1-2

A teacher is demonstrating physical and chemical changes to her class. Which action should she use to demonstrate a chemical change?

• cutting a piece of paper

• folding a piece of paper

• tearing a piece of paper

• burning a piece of paper

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5