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Decantation Mystery Vault

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Decantation Mystery Vault

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About this activity

Grade 7 science puzzle on decantation

Created by

Hidden Author
Hidden Author
Lebanon

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Decantation Mystery Vault
 

Decantation Mystery VaultOnline version

Grade 7 science puzzle on decantation

by Hidden Author
1

I am the process in which an insoluble solid settles at the bottom of a liquid.

Hints

Think about particles sinking over time.

In gravity-driven settling, the solid forms a bottom layer.

It is the way solids settle out of suspension.

2

I am the method of carefully pouring off clear liquid after a solid has settled.

Hints

This is the selected technique.

Pour slowly to avoid disturbing the sediment.

Separate liquid from settled solids.

3

I am the solid used in the lesson experiment that settles at the bottom of water.

Hints

Often used in classroom demos.

It is granular and sinks in water.

A common beach material.

4

Am I soluble or insoluble in water?

Hints

Think about substances that do not dissolve in water.

If you can see remnants in water, it's not fully dissolved.

Consider whether it dissolves completely.

5

What should happen before decantation?

Hints

This prepares for pouring off the liquid.

Waiting for particles to form a bottom layer.

Let the solid settle first.

6

What part of the mixture is carefully poured into another container?

Hints

Focus on the liquid, not the solids.

Do not disturb the bottom layer.

The liquid that appears clean after settling.

7

What remains at the bottom after the clear water is poured off?

Hints

It is the settled material.

It forms a compact layer at the bottom.

The solid left behind.

8

Does decantation require filter paper?

Hints

Decantation relies on the settled solid and poured liquid.

No filtering needed here.

The goal is to separate by settling, not filtration.

9

Which method is suitable for separating settled sand from water?

Hints

It avoids filtration, using careful pouring.

This is the technique you practice.

After sedimentation, separating liquid from settled solid uses...

 
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