WHAT'S A FOSSIL?

Saturday, Feb.24,2018

The video will explain HOW FOSSILS ARE FORMED?

Saturday Feb. 24,2018

This week  we will study the different kinds of Fossils.

I will upload a video and the lesson from the book to help you understand the lesson.

Lesson 3: What Are Fossils?

Vocabulary

A fossil is a trace or the remains of a living thing that died a long time ago. 

Fossils

Think about the “fossils” you made in the Investigate. Did they look like the shell you used? How were they different from the shell? A fossil is a trace or the remains of a living thing that died a long time ago. There are many different kinds of fossils.

Some fossils, such as bones and teeth, look like the actual parts of animals. Slowly minerals replaced the bones.

Other fossils, such as dinosaur tracks in mud, are only marks left behind. These marks are called imprints. The mud hardened, and in time it changed to rock. Some imprints are of animal parts, such as feathers. Other imprints are of leaves

A mold is the shape of a once-living thing left in sediment when the rock formed. The organism that made the mold dissolved, leaving only a cavity shaped like the organism.

A cast forms when mud or minerals later fill a mold. The cast has the actual shape of the organism itself. You made a model of a fossil mold and a fossil cast in the Investigate.

Plant fossils are not as common as animal fossils. That’s because the soft parts of plants are easily destroyed as rocks form.

MAIN IDEA AND DETAILS What are three kinds of fossils? This fossil shows a trilobite, a kind of animal that died out more than 200 million years ago. This fossil shows a trilobite, a kind of animal that died out more than 200 million years ago.

How Fossils Form

Places that have a lot of sedimentary rocks are better for fossil hunting than other places. Why? It’s because what’s left of a once-living thing is sometimes buried in the particles that form sedimentary rock. Fossils often form in limestone and shale.

Few fossils form in metamorphic and igneous rock. The pressure and temperature that form these rocks often destroy plant and animal parts before they can become fossils.

The Science Up Close shows how a fossil might have begun forming millions of years ago. After dying, the animal was quickly covered by layers of sediment. If the animal had not been covered quickly, another animal might have eaten it. After millions of years, the layers of sediment became sedimentary rock. What was left of the animal is now a fossil.

MAIN IDEA AND DETAILS Why are more fossils found in sedimentary rocks than in other rocks?

This shows what the triceratops fossil below might look like

What can a scientist tell about this fossil?

Learning from Fossils

Scientists today use fossils to learn about animals and plants that no longer exist. For example, scientists learn what kind of foods animals ate by looking at the shapes of fossil teeth. The teeth are compared to those of today’s animals.

Fossils also help scientists tell what a place was like long ago. For example, fossil clams in a place show that a sea once covered the area.

Why do scientists dig up dinosaurs very carefully?

Important News
1- No math homework because of the Arabic Exam
2-Tomorrow out of school uniform 

The 2 Times Table Song (version 2)

This week we will study Multiply by 2, this video will help you.

Grade 3 Math and Science H.W

Feb.18- Feb 22

Date	Math	Science
Sunday Feb.18	Patterns in the Multiplication  Table No H.W	What are types of rocks?
Monday Feb.19	Patterns in the Multiplication  Table HW: Book p.299-300	What are types of rocks?
Tuesday  Feb.20	Multiply by 2 HW: Sheet	What are types of rocks?
Wednesday  Feb.21	Multiply by 2 HW: Book p. 305-306	What are types of rocks?
Thursday  Feb.22	Divide by 2 HW: Study table 2	Due date for the project

Good morning Grade 3
This week science project

Pick one of the types of rocks

Igneous rock

Sedimentary rock

Metamorphic rock

Pick one type of the rocks and find information about it. 

How is this rock formed?

Names of kinds of this rock.

Where can we use this rock?

You can also add pictures or drawings.

this project is due on Thursday, Feb.22 

Happy Valentines Day
Tomorrow out of school uniform 🌹

Important News
Today no Math HW

Grade 3 Math and Science H.W

Feb.11- Feb 15

Date	Math	Science
Sunday Feb.11	Relate Division and Multiplication  H.W: Sheet	What are types of rocks?
Monday Feb.12	Relate Division and Multiplication  H.W: Book p.269-270	What are types of rocks?
Tuesday  Feb.13	Inverse Operation H.W: Sheet	What are types of rocks?
Wednesday  Feb.14	Inverse Operation H.W: Book p.275-276	What are types of rocks?
Thursday  Feb.15	Math activities	Answer in the practice book H.W :Answer the sheet

This week and next week we will study the different kinds of Rocks.

I will upload 2 videos and the lesson from the book to help you understand the lesson.

 What Are the Types of Rocks?

VOCABULARY

Igneous rock

Sedimentary rock

Metamorphic rock

Types of Rocks

Suppose you want to start a rock collection. How would you group the rocks? By color, by grain size, by whether they have layers? Rocks can look very different, but there are just three main types of rocks. The three types of rocks are grouped by how they form.

Igneous rock is a rock that was once melted and then cooled and hardened. Some igneous rocks cool quickly and look like glass. Other igneous rocks cool more slowly and have large grains.

Rock that forms from material that has settled into layers is called Sedimentary rock. The layers are squeezed together until they form rock.

The third type of rock is called metamorphic rock. Metamorphic rock is rock that has been changed by temperature and pressure.

How Rocks Form

The three types of rock form differently. Melted rock can reach Earth’s surface through a volcano. Then it cools and becomes igneous rock.

Sedimentary rock, by contrast, begins with the breaking of rocks. Wind and water break rock into bits. Then the wind and water carry the bits of rock and soil away. The bits settle into layers. After a long time, the layers harden into rock.

Metamorphic rock forms deep in Earth’s crust in yet another way. The pressure and temperature there change rock into metamorphic rock.

Wind and water break rock into small bits. Then wind and water carry away the bits of rock. Layers of these bits of rock form and, under pressure, become sedimentary rock.

  

    Wind and water break rock into small bits. Then wind and water carry away the bits of rock. Layers of these bits of rock form and, under pressure, become sedimentary rock.

Rock inside Earth softens from Earth’s high heat.Pressure in Earth’s crust then squeezes the rock.  The rock changes into metamorphic rock. The Rock Cycle Over time, one kind of rock can become any other kind. The process of rocks changing from one kind of rock to another kind of rock is called the rock cycle. The diagram on the right page shows this cycle. Wind and water break down all kinds of rocks to form sedimentary rocks. Any kind of rock that melts and cools can become an igneous rock. Any rock can end up in Earth’s crust and be pressed and heated. Then that rock can become metamorphic rock. The Rock Cycle Over time, one kind of rock can become any other kind. The process of rocks changing from one kind of rock to another kind of rock is called the rock cycle. The diagram on the right page shows this cycle. Wind and water break down all kinds of rocks to form sedimentary rocks. Any kind of rock that melts and cools can become an igneous rock. Any rock can end up in Earth’s crust and be pressed and heated. Then that rock can become metamorphic rock.

Multiplication and Division Relationships - Fun Math Videos for Kids 3rd...

We will study the Relation between Multiplcation and Division this week and these videos  will help  understand the lesson.

Photos from the Thursday's Trip to Kawalees

Grades 1,2 and 3