Problem Description:
The task is to label the layers of the Earth in the provided diagram and answer questions about each layer. The layers to be labeled are:
mantle,
inner core,
outer core, and
crust.
---
Solution:
#### Step 1: Label the Layers of the Earth
The Earth's structure consists of several layers, which can be identified based on their positions in the diagram:
1.
Crust: This is the outermost layer of the Earth. It is thin compared to the other layers and is where we live.
- In the diagram, the crust is the very thin outermost layer (greenish-blue).
2.
Mantle: This layer lies beneath the crust and extends deep into the Earth. It is divided into the upper mantle and lower mantle.
- In the diagram, the mantle is the thick yellow-orange layer surrounding the core.
3.
Outer Core: This layer is located beneath the mantle and is composed mainly of liquid iron and nickel.
- In the diagram, the outer core is the lighter orange layer surrounding the inner core.
4.
Inner Core: This is the central part of the Earth, consisting of solid iron and nickel due to extreme pressure.
- In the diagram, the inner core is the red sphere at the center.
#### Labeled Diagram:
- Top left:
Crust
- Middle left:
Mantle
- Bottom middle:
Outer Core
- Center:
Inner Core
---
#### Step 2: Answer the Questions
1.
Which layer do we live on?
- We live on the
crust, which is the outermost layer of the Earth.
2.
Which layer generates Earth's magnetic field?
- The
outer core generates Earth's magnetic field. The movement of liquid iron and nickel in this layer creates electric currents, which produce the magnetic field.
3.
Which layer is the hottest?
- The
inner core is the hottest layer. Despite being solid due to immense pressure, it has extremely high temperatures.
4.
On which layer does the crust float?
- The crust floats on the
mantle. The mantle is semi-fluid and allows tectonic plates (part of the crust) to move slowly over time.
---
Final Answers:
1.
Crust: Outermost layer (greenish-blue).
2.
Mantle: Layer beneath the crust (yellow-orange).
3.
Outer Core: Liquid layer surrounding the inner core (lighter orange).
4.
Inner Core: Central solid layer (red).
#### Question Answers:
1.
Which layer do we live on?
Crust
2.
Which layer generates Earth's magnetic field?
Outer Core
3.
Which layer is the hottest?
Inner Core
4.
On which layer does the crust float?
Mantle
---
Final Answer Box:
\[
\boxed{
\text{Crust: Outermost layer, Mantle: Beneath crust, Outer Core: Liquid layer, Inner Core: Central solid layer.}
}
\]
Parent Tip: Review the logic above to help your child master the concept of worksheet for 3rd grade science.
