What was the primary process that led to the formation of Earth approximately 4.5 billion years ago?

• Volcanic eruptions and cooling lava

• Gravitational accretion of dust and gas particles

• Collision of two large planetary bodies

• Condensation of atmospheric gases into a solid mass

Which of the following accurately describes the layers of Earth from its innermost part to its outermost?

• Liquid outer core, solid inner core, silicate mantle, rocky crust

• Solid inner core, liquid outer core, silicate mantle, rocky crust

• Silicate mantle, solid inner core, liquid outer core, rocky crust

• Rocky crust, silicate mantle, liquid outer core, solid inner core

What is a key characteristic of Earth's position in the solar system that enables the presence of liquid water on its surface?

• Its large gravitational pull, which traps water molecules.

• Its distance from the Sun, allowing water to exist in all three states.

• The presence of a large moon, stabilizing its orbit.

• Its rapid rotation, preventing water from freezing.

Which of the following represents the correct chronological order of life's emergence on Earth?

• Photosynthetic bacteria, First life, Complex cells, First vertebrates

• First life, Photosynthetic bacteria, Complex cells, First vertebrates

• Complex cells, First life, Photosynthetic bacteria, First vertebrates

• First vertebrates, Complex cells, Photosynthetic bacteria, First life