Lecture 3: Journey To The Centre Of The Earth

Question 1

When/who was the first person in space?

Answer 1

Yuri Alekseyevich Gagarin on April 12, 1961

Question 2

When/who was the first person on the moon?

Answer 2

Neil Armstrong on July 20, 1969

Question 3

Interstellar space is a _____

Answer 3

Vacuum

Question 4

The Oort Cloud

Answer 4

Starts at 3500 AU and is populated by specks, flakes, and balls of ice (which are made from water, carbon dioxide, ammonia, and methane ice).

Question 5

What is space ice?

Answer 5

Ice made from water, carbon dioxide, ammonia, and methane ice

Question 6

Heliosphere

Answer 6

Edge of the solar system and is where the outer reach of solar winds (charged particles from the Sun)

Question 7

Kuiper belt

Answer 7

a collection of icy objects, including the dwarf planets Pluto and Eris, and Neptune’s orbit

Question 8

1 AU represents

Answer 8

Distance between earth and sun

Question 9

Distance between earth and sun

Answer 9

150m km

Question 10

Journey from interstellar space to Neptune

Answer 10

50000AU Sun’s gravity
3500AU Oort Cloud
200 AU Heliosphere
55-30AU Kuiper Belt

Question 11

Comets

Answer 11

Comets expel gas and dust as they warm approaching the Sun. Comets are made of water, carbon dioxide, ammonium, and methane, other compounds, and rock dust. Comet “tails,” always point away from the sun, regardless of the direction of comet motion.

Question 12

What is known as a dirty snowball?

Answer 12

Comets

Question 13

What do asteroids and comets share in common?

Answer 13

They are both Solar System materials that escaped from being incorporated into planetesimals

Question 14

Meteorite

Answer 14

Fragments of asteroids and comets that STRIKE the earth

Question 15

Where does asteroid ida reside?

Answer 15

In the asteroid belt between mars and Jupiter

Question 16

Interplanetary space vs interstellar space

Answer 16

Interplanetary space is more denser than interstellar space

Question 17

Asteroid belt

Answer 17

Is between mars’ and Jupiter’s orbits, asteroids that border Jupiter’s orbit are called Trojans or Greeks, and asteroids on the main belt are called hildas

Question 18

Terrestrial Planets differ from each other in terms of:

Answer 18

Size
Atmosphere
Surface features
Form(structure) and 
Presence of water

Question 19

Earth’s magnetic field

Answer 19

11-12

Question 20

Auroras

Answer 20

13

Question 21

Earth’s atmosphere

Answer 21

14-16

Question 22

What are the earth systems that make up the the earth?

Answer 22

Atmosphere
Hydrosphere
Cryosphere
Biosphere
Lithosphere

Question 23

What is unique about earth in terms of water from other planets?

Answer 23

It’s the only planet that has liquid water (a hydrosphere)

Question 24

Habitable zone

Answer 24

Also known as Goldilocks zone that lies between 0.8 and 2.5 AU

Question 25

What about an atmosphere makes it livable?

Answer 25

Some atmosphere trap heat, some do not have mechanism to conserve heat (extreme temp)

Question 26

Topography

Answer 26

is the study of the shape and features of land surfaces

Question 27

Bathymetry

Answer 27

the measurement of depth of water in oceans, seas, or lakes

Question 28

Hypsometric curve

Answer 28

shows the proportion of Earth’s solid surface at different elevations.

Question 29

Earth’s surface is mostly:

Answer 29

continent (plains and shelf) or ocean floor. Mountains and deep trenches are rare

Question 30

Maximum difference of mountains and deep trenches are =

Answer 30

19.8km.