**scientific notation**all the time in this course.

**Size**of Sun and other astronomical objects:

**Earth**: radius = 6378 kilometer, diameter = 12756 kilometers. Sun: radius = 696,000 kilometers, > 100 times larger.

Similarly one may ask, what is the diameter of the Earth in scientific notation?

Earth is the third planet from the sun. 71% of Earths surface is water. Its the only planet with life. It has a diameter of 12,756.3 **km** (Scientific notation: 1.2756 x 10e4) and a radius of 56,378.15 **km** (Scientific notation: 5.6378 x 10e4 **km**.)

One may also ask, how big the earth is? 6,371 km

Furthermore, what is the distance in scientific notation?

That’s a lot of zeros, and it is easy to lose count when trying to figure out the place value of the number. Using **scientific notation**, the **distance** is 5.88×1012 5.88 × 10 12 miles. The exponent of 12 tells us how many places to count to the left of the decimal.

What is the real shape of the earth?

spheroid

### What is the radius of Sun?

###
What is Earth made of?

**Earth**is

**made**out of many things. Deep inside

**Earth**, near its center, lies

**Earth’s**core which is mostly

**made**up of nickel and iron. Above the core is

**Earth’s**mantle, which is

**made**up of rock containing silicon, iron, magnesium, aluminum, oxygen and other minerals.

###
What is Earth’s Planet number?

**Earth**. The third

**planet**from the sun,

**Earth**is a waterworld, with two-thirds of the

**planet**covered by ocean.

###
How much is a trillion in scientific notation?

Scientific notation | American name (Short Form) | British name (Long Form) |
---|---|---|

10^{5} |
Hundred thousand | Hundred thousand |

10^{6} |
Million | Million |

10^{9} |
Billion | Thousand million |

10^{12} |
Trillion | Billion |

###
What is the exact radius of the earth?

**6,356 km**) — a difference of 13 miles (22 km).

###
Who discovered radius of Earth?

###
What is the exact mass of the moon?

**moon’s mass**is 7.35 x 10

^{22}kg, about 1.2 percent of Earth’s

**mass**. Put another way, Earth weighs 81 times more than the

**moon**. The

**moon’s**density is 3.34 grams per cubic centimeter (3.34 g/cm

^{3}).

###
What is scientific notation in math?

**Math**: 8.EE.A.3.

**Scientific notation**is a way of writing very large or very small numbers. A number is written in

**scientific notation**when a number between 1 and 10 is multiplied by a power of 10. For example, 650,000,000 can be written in

**scientific notation**as 6.5 ✕ 10^8.

###
How do you do scientific notation?

**scientific notation**:

**Put** the decimal after the first digit and drop the zeroes. To find the exponent count the number of places from the decimal to the end of the number.

###
How do engineers use scientific notation?

**engineering**is to

**use**a slightly modified

**scientific notation**.

**Engineers**like exponents in multiples of three. This means the digits to the left of the decimal point fall in the range of one to 999. Our minds

**do**a pretty good job relating to numbers in this range.

###
When writing a number in scientific notation how many digits should be to the left of the decimal?

**digit**in this

**number**is the leading 9, so that’s where the

**decimal**point will need to go. To get from where it is to right after the 9, the

**decimal**point will need to move seven places to the

**left**.

###
How far away is the sun in scientific notation?

**Scientific Notation**: It is very inconvenient to always have to write out the age of the universe as 15,000,000,000 years or the

**distance**to the

**Sun**as 149,600,000,000 meters.

###
Who named Planet Earth?

**The**answer is, we don’t know.

**The**name “

**Earth**” is derived from both English and German words, ‘eor(th)e/ertha’ and ‘erde’, respectively, which mean ground. But,

**the**handle’s creator is unknown. One interesting fact about its name:

**Earth**is

**the**only

**planet**that wasn’t

**named**after a Greek or Roman god or goddess.

###
What does outer space look like?

**Space**is full of light, but it doesn’t

**look like**it. The color black usually signals the absence of light. But inside the solar system,

**space**is filled with light.

###
What does Earth look like from space?

**space**,

**Earth looks like**a blue marble with white swirls. Some parts are brown, yellow, green and white. The blue part is water. Water covers most of

**Earth**.

###
How much water is there in the world?

**much water**is that? It’s roughly 326 million cubic miles (1.332 billion cubic kilometers), according to a recent study from the U.S. Geological Survey. Some 72 percent of Earth is covered in

**water**, but 97 percent of that is salty ocean

**water**and not suitable for drinking.

###
How do you describe Earth?

**Earth**is really an “oblate spheroid,” because its spin causes it to be squashed at its poles and swollen at the equator. Water covers roughly 71 percent of

**Earth’s**surface, and most of that is in the oceans. About a fifth of

**Earth’s**atmosphere consists of oxygen, produced by plants.

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