Cody@Hornby High School: Crystals

Thursday, March 14, 2019

Crystals

Aim: To learn about a saturated solution and how to make crystals

Definition of solution:

A liquid mixture, when something is dissolved into a liquid (eg: sugar in water)

Definition of saturated:

Having or holding as much as can be absorbed of something (when no more sugar or borax can be dissolved into the water)

In groups of three you will make three different types of crystals and compare the results.

Borax Crystals

Ratio; 3 Tablespoons Borax per 1/2 cup water

Materials

1) Cup

2) borax

3)string

4)hot water

5) 3 pipe cleaners

6) stick

Process

Step 1: put 3 spoons of borax in the cup

Step 2: insert hot water

Step 3: stir with stick

Step 4: put stick on top of cup

Step 5: tie string on and twist 3 pipe cleaners

Step 6:tie pipe cleaners to string ad inset pipe cleans into the cup and wait

Sugar Crystals

Ratio: 1 cup sugar to 1/2 cup water

Materials

1) string

2) water

3) cup

4) sugar

5) stick

Process

Step 1: put 4 spoons of sugar in

Step 2: insert hot water

Step 3: stir

Step 4: tie string to stick

Step 5: put stick on cup

Step 6: wait

Salt Crystals

Ratio: 4 Tablespoons salt to 1/2 cup water

Materials

1) string

2) water

3) cup

4) salt

5) stick

Process

Step 1: put 4 spoons of salt in

Step 2: insert hot water

Step 3: stir

Step 4: tie string to stick

Step 5: put stick on cup

Step 6: wait

Findings

Describe your crystals in the table below.

Crystal Type	Shape (Describe the shape)	Size (of individual crystals)	Hardness (Crumbly to Rock Hard)
Borax	still like a star	same	hard
Sugar	same	same	hard
Salt	same	same	hard

What crystals worked out best and why?:

Conclusion:

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After watching the videos as a class, explain how the following crystals are formed:

Type	Explanation
Salt	seawater, pond, sun, evaporation, salt
Sugar	sugar cane, chop it up, squish, juice, heat up juice to evaporate water, crystallises
Snowflakes	dust, water freezes to dust. more water freezes.