What are the primary material inputs required for photosynthesis to produce glucose and oxygen?

• Oxygen and water

• Carbon dioxide and light

• Carbon dioxide and water

• Glucose and light

Which of the following is NOT listed as a type of biomass used for energy?

• Wood

• Garbage

• Natural gas

• Crops

Why is biomass energy considered carbon neutral, even though burning it releases carbon dioxide?

• The carbon dioxide released is immediately absorbed by the oceans.

• The plants used for biomass absorb an equivalent amount of carbon dioxide during their growth.

• Biomass burning produces less carbon dioxide than fossil fuels.

• The carbon dioxide is captured and stored underground after burning.

What is a significant challenge in producing hydrogen fuel for fuel cells?

• Hydrogen is too heavy for practical transport.

• The process of electrolysis to produce hydrogen requires more energy than the fuel cell generates.

• Hydrogen fuel cells produce harmful byproducts like carbon dioxide.

• Pure hydrogen is too reactive and difficult to store safely.

What advantage do hydrogen fuel cells offer for applications requiring continuous operation and minimal emissions, such as forklifts in enclosed spaces?

• They are easily rechargeable with standard electrical outlets.

• They produce significant amounts of heat, which can be repurposed.

• They do not release problematic fumes and can store energy carbon-neutrally.

• They are less expensive to implement than traditional battery systems.

What is the primary event that occurs when a fast-moving neutron strikes a Uranium-235 atom in a nuclear fission reaction?

• The atom absorbs the neutron and becomes a heavier isotope.

• The atom splits into two smaller atoms, releasing energy and additional neutrons.

• The atom undergoes a chemical change, forming a new compound.

• The atom converts directly into pure energy without splitting.

What is the main concern regarding nuclear waste produced by nuclear fission power plants?

• It is difficult to transport due to its large volume.

• It emits highly energetic and dangerous radioactive particles.

• It requires constant cooling for thousands of years.

• It contributes significantly to greenhouse gas emissions.

What is one of the major engineering challenges in developing nuclear fusion as a viable energy source on Earth?

• Finding a sufficient supply of hydrogen isotopes for fuel.

• Generating enough power from the fusion reaction to exceed the energy consumed by the powerful magnets.

• Preventing the fusion reaction from becoming an uncontrolled explosion.

• Developing materials that can withstand the extreme cold temperatures required.