Physical and Chemical Changes

Physical and Chemical Changes

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

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

Chickpea flour

Look at Cake

Butter

Sugar

Eggs

Salt

Milk

Flour

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

Physical Properties

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.

Chemical 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.

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

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.

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02

cutting Different Shaped cookies

Cookie being crushed

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03

melting ice popsicle

TAking a bite of donut

Chemical Change

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.

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Burnt Chicken

oxidized apple

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Rotting strawberry

Ripening Bananas

Physical and Chemical Changes Questions

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1/10

A type change in matter which can be reversed

Chemical Change

Physical Change

Operational Change

Right!

Let's move on to the next question

2/10

A change in matter which cannot be undone.

Catalystic Change

Reactive Change

Chemical Change

Right!

Let's move on to the next question

3/10

Which of these is a physical change

Cooking a pancake

Freezing orange juice

Leaving tomatoes to ripen

Right!

Let's move on to the next question

4/10

Pick the chemical change

Slicing a pineapple

Juicing a pineapple

Grilling a pineapple

Right!

Let's move on to the next question

5/10

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

It will smell bad

There will be less of it

It will weigh more

Right!

Let's move on to the next question

6/10

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

Mashing cooked potatoes

Peeling uncooked potatoes

Boiling the potatoes

Right!

Let's move on to the next question

7/10

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

Structural Change

Proton Change

Physical Change

Right!

Let's move on to the next question

8/10

Physical Change

Chemical Change

Right!

Let's move on to the next question

9/10

Physical Change

Chemical Change

Right!

Let's move on to the last question

10/10

Proton Change

Physical Change

Congratulations!

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

Form

Wrong

Try again!

Bon appetit!