IQ2 & 3 Summary quiz

Where did iron and silica possibly originate on Earth?

• From outer space

• Hydrothermal vents and ocean waters

• Volcanic eruptions

• The core of the Earth

What gases initially composed the Earth's atmosphere, released by volcanoes?

• Oxygen and nitrogen

• Carbon dioxide and methane

• Hydrogen sulfide and ammonia

• Water vapor and sulfur dioxide

How did cyanobacteria impact the Earth's early environment?

• They caused global warming

• They produced iron oxide sediments

• They released free oxygen into the oceans

• They were responsible for volcanic activity

What causes the formation of alternate bands of iron and silica in sedimentary rocks?

• Volcanic eruptions

• The tides in the oceans

• Oxygen reacting with iron

• The dissolution of minerals in rocks

How did the introduction of oxygen affect early bacteria?

• It led to their extinction

• It made them thrive

• It had no impact

• It made them anaerobic

How can supercontinents break apart along lines of weakness?

• Due to asteroid impacts

• Because of volcanic activity

• When different parts move at different speeds

• When they grow too large

Which supercontinent existed before Pangaea during the late Precambrian?

• Pangaea

• Rodinia

• Laurasia

• Gondwana

Which of the following is not one of the Earth's major spheres?

• Atmosphere

• Geosphere

• Biosphere

• Ionosphere

What protects life on Earth from harmful ultraviolet radiation?

• The ozone layer

• The geosphere

• The hydrosphere

• The ionosphere

What can volcanic eruptions eject into the stratosphere, potentially causing famines?

• Carbon dioxide

• Oxygen

• Dust and sulfuric acid aerosols

• Nitrogen gas