Changes around us

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Chemistry

•

6th Grade

•

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Saranya C

Used 421+ times

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7 Slides • 7 Questions

Changes around us

ELO's for the class

At the end of this class, you will be able to:

differentiate between reversible and irreversible changes
Classify any given change as physical/chemical.

Reversible change

Final substance can be brought back to original form.
Change that can be reversed.

Multiple Choice

In any reversible change

final substance cannot be brought back to its original form

final substance can be brought back to its original form

new substance is formed

Multiple Choice

Pick the reversible change

Crushing paper

Tearing a piece of cloth

burning paper

Irreversible change

Final substance cannot be brought back to its original form
Change that cannot be undone

Multiple Choice

Pick the irreversible change

Bursting balloons

Melting ice

Folding clothes

Physical change

Change in the physical properties like size, shape, or state.
No new substance formed
Mostly reversible

Multiple Choice

Which one is true about physical changes?

new substance is formed

there is change in chemical composition

no new substance is formed

Multiple Choice

Pick the physical change

burning paper

bursting balloons

frying potatoes

Chemical change

Change in the chemical composition
New substance is formed
Mostly irreversible

Multiple Choice

Which of the following is true about chemical changes?

No new substance is formed

New substance is formed

All chemical changes are reversible

Multiple Choice

Which of them is not a chemical change?

Baking cake

Rusting of iron

Cutting vegetables

SUMMARY

Any change in which the final substance can be brought back to its original form is called a reversible change.
An irreversible change is one which cannot be undone.
In any physical change, no new substance is formed.
In a chemical change, new substance is formed.

Changes around us

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