Physical and Chemical Changes

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Physical and Chemical Changes

Other changes are forever, like metal rusting or a match burning

Matter is Changing around you. Some changes, like freezing, can be undone. Scientists call those types of changes reversible.

Chickpea flour

Look at Cake

You can start off with physical changes and make chemical changes...

Flour

Milk

Salt

Eggs

Sugar

Butter

Mix the butter and sugar in a bowl. Add Eggs and salt. Alternate Milk and Flour. You have cake batter. You can no longer find the salt and sugar, or point out the milk. However, the matter only changed appearance. The molecules have not changed. This is a Physical Change. You may not be able to restore them, but a lab can.

Physical Properties

Bake the batter and you cannot bring back the original ingredients. The heat from the oven causes the molecules of butter, sugar, eggs, milk, and flour to break up and reform. This is a chemical change. It cannot be undone.

Chemical Properties

If the physical properties change: shape, size, texture, mass, weight, or denisty- it is a physical change. Melting ice-cream is an example of a physical change.

Different Physical Changes

If the physical properties change: shape, size, texture, mass, weight, or denisty- it is a physical change. Melting ice-cream is an example of a physical change.

Different Physical Changes

cutting Different Shaped cookies

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melting ice popsicle

03

02

TAking a bite of donut

01

Cookie being crushed

If the physical properties change: shape, size, texture, mass, weight, or denisty- it is a physical change. Melting ice-cream is an example of a physical change.

Chemical Change

Rotting strawberry

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oxidized apple

07

06

Burnt Chicken

05

Ripening Bananas

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Physical and Chemical Changes Questions

Operational Change

Physical Change

Chemical Change

1/10

A type change in matter which can be reversed

Let's move on to the next question

Right!

A change in matter which cannot be undone.

Chemical Change

Catalystic Change

Reactive Change

2/10

Let's move on to the next question

Right!

Leaving tomatoes to ripen

Freezing orange juice

Cooking a pancake

Which of these is a physical change

3/10

Let's move on to the next question

Right!

Pick the chemical change

Grilling a pineapple

Slicing a pineapple

Juicing a pineapple

4/10

Let's move on to the next question

Right!

Oops, you left out the milk. How can you tell if it underwent a chemical change and went bad?

It will smell bad

It will weigh more

There will be less of it

5/10

Let's move on to the next question

Right!

You were tasked to make mashed potatoes. Which step involves a chemical change?

Boiling the potatoes

Mashing cooked potatoes

Peeling uncooked potatoes

6/10

Let's move on to the next question

Right!

You were given ready made ingredients and tasked to make tacos.

Physical Change

Proton Change

Structural Change

7/10

Let's move on to the next question

Right!

Chemical Change

Physical Change

8/10

Let's move on to the next question

Right!

Chemical Change

Physical Change

9/10

Let's move on to the last question

Right!

Physical Change

Proton Change

10/10

Form

You've finished your burger. It's time to eat!

Congratulations!

Try again!

Wrong

Bon appetit!