Other 4%

Scientists are not yet certain if thecore of Mars is solid, liquid, or in two distinct sublayers, like Earth’s.Future measurements will tell us more.Mars shows no evidence of tectonicplates.

Mars has about 1/10 of the massof the Earth.

62.5 % less gravity on mars

Mars is about 71% as dense as Earth

Mars has about 15%of Earth’s volume.

1

15%

110

Other 1%

Year

Mass

Density

Gravity

Volume

1. Phobos moon tidal effect?

Crust

Vs

4. Faulting

3. Meteorite impacts?

Earth atmosphere is 100 times more dense than Mars’

Carbon Dioxide 96%

Nitrogen 78%

Oxygen 21%

2. Atmospheric excitation?

365 Earth days

Spring Summer Autumn Winter

Spring Summer Autumn Winter [Northern hemisphere seasonsshown]

687 Earth days

Four potential seismic sourceson Mars

Man

tle

Man

tleLi

quid

Outer

Co

re

58°C

14°C

-88°C

0°C

-63°C

30°C

Aver

age

surf

ace

tem

pera

ture

ra

nge

-140°C

SolidCore

Crust

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