1a-1 Earth before life

What is the estimated age of the Earth?

• 2.6 billion years

• 4.6 billion years

• 6.6 billion years

• 8.6 billion years

What process formed the Earth?

• Volcanic eruptions

• Tectonic plate movements

• Gravity pulling rock fragments together

• Meteorite impacts

What is the significance of the Earth's mass for the development of life?

• It prevents gases from escaping into space

• It creates a strong magnetic field

• It determines the distance from the Sun

• It controls the rotation speed

Which elements essential for life were present in the Earth's early atmosphere?

• Carbon, helium, oxygen, nitrogen

• Carbon, hydrogen, oxygen, nitrogen

• Carbon, hydrogen, oxygen, helium

• Carbon, nitrogen, oxygen, helium

Why is water vital for living organisms?

• It provides energy for biological reactions

• It regulates temperature on Earth

• It prevents excessive heating or cooling

• It is the general physiological solvent

What role does the distance from the Sun play in the development of life?

• It determines the rotation speed of the Earth

• It prevents liquid water from being present

• It produces suitable temperatures on Earth

• It creates seasonal variations in conditions

What effect does the axis of rotation have on Earth?

• It produces a day/night cycle

• It deflects the 'solar wind'

• It prevents biologically damaging radiation

• It reduces temperature extremes

What was the composition of the Earth's atmosphere when life first developed?

• High levels of oxygen

• High levels of carbon dioxide

• Toxic gases and no oxygen

• Toxic gases and high levels of oxygen

What type of radiation was present in the solar energy reaching the Earth's surface?

• Infrared radiation

• Visible light

• Ultra-violet radiation

• X-ray radiation

What produced the Earth's magnetic field?

• The rotation speed of the Earth

• The molten layers beneath the crust

• The distance from the Sun

• The mass of the Earth