Science: Solar system 3

The Venusian atmosphere is composed mainly of: a) Hydrogen and Helium b) Nitrogen and Oxygen (c) Carbon Dioxide d) Water vapor

• Hydrogen and Helium

• Nitrogen and Oxygen

• Carbon Dioxide

• Water vapor

What is the main component of the solar wind? a) Light particles (photons) (b) Charged particles (protons and electrons) c) Asteroids and comets d) Micrometeoroids

• Light particles (photons)

• Charged particles (protons and electrons)

• Asteroids and comets

• Micrometeoroids

The rings of Saturn are primarily made up of: a) Large rocks and dust b) Volcanic ash from moons c) Captured asteroids (d) Ice particles and dust

• Large rocks and dust

• Volcanic ash from moons

• Captured asteroids

• Ice particles and dust

The process responsible for the formation of mountains on Earth is: a) Volcanic eruptions only (b) Plate tectonics c) Impact craters from meteorites d) Erosion by wind and water

• Volcanic eruptions only

• Plate tectonics

• Impact craters from meteorites

• Erosion by wind and water

What is the main difference between a dwarf planet and a true planet according to the International Astronomical Union (IAU)? a) Size is the only factor. b) Dwarf planets have a thicker atmosphere. c) Dwarf planets have an irregular orbit. (d) Dwarf planets have not cleared their orbital neighborhood of other objects.

• Size is the only factor

• Dwarf planets have a thicker atmosphere

• Dwarf planets have an irregular orbit

• Dwarf planets have not cleared their orbital neighborhood of other objects