04/19/23 EMI1P2

Earth Materials

Part 2

Taking Rocks Apart

04/19/23 EMI1P2

Safety Rules

Never put any materials in your mouth.

Do not taste any chemical or material unless your teacher specifically tells you to.

Do not smell any unknown material.

If your teacher asks you to smell a material, wave a hand over the material to draw the scent toward your nose.

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Safety Rules

Avoid touching your face, mouth, ears, or eyes while working with chemicals, plants, animals or other science materials.

Be careful when using sharp or pointed tools. Always make sure that you protect your eyes and those of your neighbors.

Clean up your work space after each investigation.

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Safety Rules

Report all accidents, even small ones to your teacher.

Follow directions and ask questions if you’re unsure of what to do.

Behave responsibly during science investigations.

Remember – students who cannot follow directions become “Observers.”

Vocabulary Review

diameter – the distance across a circular object

circumference – the distance around a circular object

depth – how thick an object is property – a physical trait or characteristic

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Earth Materials Notebooks

You will record your observations on Page 4 of your Earth Materials booklet.

Make sure that you take complete notes and write legibly.

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Essential Questions

These are the questions you will be able to answer after this lesson.

What are rocks made of?

How can you identify the ingredients of rocks?

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Challenge

Your challenge is to separate and identify as many of the ingredients in your mock rock as you can.

An important job of a geologist is to find out what materials make up the rocks found in the field.

This information provides evidence about what the earth is made of.

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Special Tools

Geologists use special tools such as picks to take rocks apart to observe what they are made of.

Your nails will serve as your geologist’s pick for this activity.

Be sure to wear your goggles to protect your eyes.

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Taking Rocks Apart

Each student will work with a rock on a paper plate.

Use your “picks” to break the rocks apart and separate the different ingredients, sorting them into piles.

After sorting the materials write your observations on page 4 in our Earth Materials booklet.

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Taking Rocks Apart

No. 1 students will get materials for their group. 4 paper plates 4 mock rocks 4 “picks” 4 hand lenses 4 plastic cups

Begin taking your rocks apart and separating the ingredients as soon as you have your materials.

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Wrap Up

Can you identify the ingredients that make up your mock rock?

If you had a rock made of other ingredients, would it be the same as your mock rock?

Imagine you put all the ingredients back together. How would this new rock be the same and different?

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Wrap Up

How many different ingredients did you find in your rocks?

Rocks are made up of several different ingredients.

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Wrap Up

The red gravel in your rock is a mineral. If we divide the material into smaller pieces, it would still be the same material.

So red gravel is not a rock; it is made up of only one ingredient.

When an ingredient of a rock cannot be divided into other ingredients, it is called a mineral.

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Wrap Up

Record the mock rock “minerals” you have discovered so far on the bottom of page 4 of your booklets.

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Vocabulary

Rock – an earth material that is made up of many different ingredients called minerals

Mineral – an ingredient of rocks that is only one material – it cannot be separated into other ingredients

Rocks are made up of many different minerals.

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Clean Up

Put all the gravel and shells in the cup.

Number 3 of each group please take the cups to the science table.

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Leftover Gray Materials

Do you think the gray material can be separated further?

How could you do that?

Talk it over in your group. No. 3s, be ready to share your groups’ ideas.

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Materials

Number 4s please get 4 vials, a syringe, 4 sticky notes and a cup of water for your groups.

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Adding Water

1. Fill the vials one-third full with leftover gray material.

2. Add water to the vials until it is about 1 cm from the top.

3. Snap on the cap and hold it tightly while shaking for a few minutes.

Student No. 4 – return the water and syringe to the science table.

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Adding Water

Observe the contents and draw a picture on the first vial outline on page 5 of the Earth Materials booklet.

Record your observations on page 5 after shaking.

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Observations

How has adding water helped to separate the rock ingredients?

What do you notice about the way the materials are beginning to settle?

What do you think will happen if the vials settle overnight?

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Observations

Do you think that there is anything dissolved in the water? How will you know?

What will you observe if the ingredient dissolves?

What will you observe if an ingredient doesn’t dissolve?

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Settling

We are going to let the vials settle overnight.

Put your name on a sticky note and put it on your vial.

Student No. 4 please take all remaining materials to the science table.

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Vocabulary Review

Rock – an earth material that is made up of many different ingredients called minerals

Mineral – an ingredient of rocks that is only one material – it cannot be separated into other ingredients

Rocks are made up of many different minerals.

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Vocabulary

Dissolve – when some substances mix with water, they break down into such small pieces that they seem to disappear into the water.

We say the substance has dissolved in the water.

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Content/Inquiry Chart

1. What are rocks made of?

2. What is the difference between rocks and minerals?

3. How can you identify the ingredients of rocks?

4. How can the minerals in a rock be separated?