Science 9 Quarter 3.1

What is a volcano?

• A large storm with very high-speed winds.

• An opening in the Earth's crust where magma erupts to the surface.

• A large cloud that generates rain, hail, and lightning.

• A violent shaking of the Earth that occurs when two tectonic plates bump into each other

How can volcanic heat be used to generate electricity?

• By using the heat to warm water, which is then used to generate electricity through a steam turbine.

• By capturing the heat from the lava flow and converting it directly into electricity.

• Volcanic heat cannot be used to generate electricity.

• By drilling into the Earth's crust and using the heat to create steam, which is used to power a turbine and generate electricity.

Which of the following is TRUE about binary cycle geothermal power plants?

• They use low temperature water to generate electricity.

• They are the most common type of geothermal power plant.

• They are only found in certain geological formations.

• They use high temperature steam directly to generate electricity.

What type of energy conversion takes place in a geothermal power plant?

• Electrical energy to mechanical energy to thermal energy

• Mechanical energy to electrical energy to thermal energy

• Chemical energy to thermal energy to electrical energy

• Thermal energy to mechanical energy to electrical energy

What is the function of the injection well in a geothermal power plant?

• To return cooled water back into the Earth.

• To store cooled water. 

• To cool the geothermal power plant.

• To separate the steam from water.

What is the fluid used in geothermal power plants?

• water

• ammonia

• hydrogen

• carbon dioxide

How does a volcano generate energy?

• By producing heat from the magma and hot gases.

• By harnessing the kinetic energy of the lava flow.

• By putting wires in the cracks to generate electricity.

• By generating electricity through a process called geothermal power.

How does volcanic ash affect the environment?

• It helps prevent soil erosion and landslide.

• It can cause air pollution and respiratory problems.

• It can improve air quality by absorbing pollutants and toxins.

• It has no impact on the environment.

Which of the following factors associated with huge volcanic eruptions may cause the decrease in the Earth’s average temperature for a few years?

• Lava  

• lahar flows    

• volcanic ash 

• acid rain            

What is the difference between lava and magma?

• Lava is found beneath the Earth's surface, while magma is found on the surface.

• Lava is molten rock that has reached the Earth's surface, while magma is molten rock beneath the Earth's surface.

• There is no difference between lava and magma.

• Lava is made up of solid rock, while magma is made up of molten rock.