1. Understanding Scale Earth In Space
Is the huge Earth really that big when compared to other things in our solar system?

2. Sponge Wed. 3/10/10 Sponge Guide - Start Each Sponge with Date
- Neat to Read
- Use lines as guide
- 4 Sentences
- No ‘junk’ sentences

3. Sponge Wed. 3/10/10 Draw and label the , , & .
Draw the ‘s and ’s Orbits.
Label each with “The _____’s orbit around the ______ takes ______ days”
Draw how the and rotate.
Label the rotations with “The ______’s rotation around _______ takes _____ days.”

4. Earth
The Earth’s orbit around the Sun takes days (365 ¼ days).
The Earth’s rotation around itself takes 1 day.
Q: What is a Solar Year?

5. Moon
The Moon’s orbit around the Earth takes 27.3 days.
The Moon’s revolution around itself takes 27.3 days.
What is a Lunar Calendar?

6. Lunar Calendar Only one used today is the Haji
Used for Islamic Religious purposes
Cultures that used to use it
Chinese Hebrew Hindu
Based on Phases of the Moon.
Each month is one moon cycle.
Q: How many days in a Lunar Month?
Q: What are the effects?

7. Lunar Calendar Q: How many days in a Lunar Month? 27.25 days
Q: What are the effects?
- A Lunar Year is only
354.7 days long
- Not linked to Seasons
- Drifts each Solar Year by 11 days
- Takes 33 Lunar Years to come back in position with
a Solar Calander

8. Team Activity Each Team gives one post-it answer per Folder Question
I will call ‘Pass’ each 2 minutes
Pass Folder to the Right
10 Questions in all

9. How is Earth different from other planets?
What can we learn about Earth by studying the Solar System?

10. Name the planets challenge.

11. Sponge Thursday 3/11 Radius Diameter Circumference
Part 1:
Make this table and complete it.
Measurement
Definition
Radius
Diameter
Circumference
Part 2:
What imaginary line around the Earth is used as the measurement of its circumference?

12. Sponge Thursday 3/11 d =2xr r = C / 2π C = 2rπ Radius Diameter
Measurement
Calculation
Definition
Radius
r = C / 2π
Diameter
d =2xr
Circumference
C = 2rπ

13. Part 2:
What imaginary line around the Earth is used as the measurement of its circumference?
The Equator
Earth’s diameter = kilometers
What is the length of the equator?

14. Quick Problem C = 2rπ C = 12742 km x π C = 12742 km x 3.14 = 40,010 km
Earth’s diameter = kilometers
What is the length of the equator?
C = 2rπ
C = km x π
C = km x = 40,010 km
(24,800 miles)
2r = d = km

15. Scale What does it mean when something is “Built to Scale”
or “Not Drawn to Scale”?

16. For every 1 unit of the model there are 18 units of the real.
A scale model is a reduced size model in all aspects.
Scale is Relative Size
Scale is shown by a ratio
Example: 1:18 scale
For every 1 unit of the model
there are 18 units of the real.

17. What scale does the model represent?
12 foot Real
1 foot Model
1:12 scale
Foot

18. What Scale is Mini Me
Model
3 ft
Real
6 ft

19. Scale can also be . . .
1:30 Scale
1/30th %

20. Earth Units
The Diameter of the Earth makes an easy to understand measurement
We can compare it easily because we have a good gauge / idea of the Earth Diameter
- the measurement is real to us
I can think in “Football fields”.

21. Sponge Friday 3/12 Does a toy top ‘revolve’ or ‘rotate’?
Why do the sun and the moon look the same size?
Have you ever seen a Solar System drawn to scale (both size and distance)?
How many Earth Diameters is the distance between the Earth and the Sun?

22. Index Card Quiz (7 Questions)
5. My model ship was made on a scale of 1:25 . The model is 3 feet long. How large would the real ship be?
6. How many Earth diameters can fit across the Sun (Sun Diameter).
7. Bonus
How many Moon diameters can fit across the Sun (Sun Diameter)?

24. Index Card Quiz How many Earth days are in one Moon revolution?
How long is one Earth Revolution?
How long is one Earth Rotation?
My model ship was made on a scale of 1:25 . The model is 3 feet long. How large would the real ship be?