Physics and Biology Concepts Assessment

The video explains how airbags save lives using a decomposition reaction that inflates them quickly during a collision. It also discusses the design of airplane windows, highlighting the shift from square to oval windows to prevent stress-induced cracks. The phenomenon of wrinkly fingers in water is attributed to an evolutionary adaptation for better grip. Lastly, the video warns about the dangers of inhaling pure oxygen, which can lead to an increase in harmful free radicals.

What triggers the inflation of an airbag during a collision?

• A hydraulic system

• A mechanical lever

• A manual button

• A chemical reaction

What gas is primarily responsible for inflating the airbag?

• Oxygen

• Carbon Dioxide

• Helium

• Nitrogen

Why were square airplane windows replaced with oval ones?

• To increase cabin pressure

• To prevent stress concentration and potential cracks

• To reduce manufacturing costs

• To improve aesthetics

What happens to the cabin when an airplane flies at high altitudes?

• It becomes more rigid

• It remains the same

• It expands

• It contracts

What causes our fingers to wrinkle when submerged in water?

• Skin dehydration

• Nervous system response

• Water absorption

• Temperature change

What evolutionary advantage might wrinkly fingers provide?

• Faster swimming

• Enhanced grip on wet surfaces

• Improved dexterity

• Better heat retention

What percentage of the air we breathe is oxygen?

• 10%

• 21%

• 50%

• 78%

What harmful byproducts can form when inhaling pure oxygen?

• Sulfur dioxide

• Nitrogen oxides

• Free radicals

• Carbon monoxide

What role do antioxidants play in our body?

• They increase oxygen levels

• They neutralize free radicals

• They bind with hemoglobin

• They produce energy

What can excessive free radicals do to red blood cells?

• Make them more flexible

• Enhance their function

• Change their chemical structure

• Increase their lifespan