Biological Clocks and the Rhythm of Life - Lesson Plan

The video explores the concept of rhythms and cycles on Earth, both external and internal. It discusses the Earth's rotation and orbit, leading to day-night cycles and seasons, and the lunar cycle's impact on marine life. The field of chronobiology studies these patterns, including internal biological rhythms like circadian rhythms, which are regulated by biological clocks. These clocks are synchronized by a master clock in the brain, the SCN. The video also covers ultradian and infradian rhythms, highlighting the predictable patterns in life despite apparent chaos.

What is the study of biological rhythms and cycles called?

• Geology

• Ecology

• Astrobiology

• Chronobiology

What causes the cycle of day and night on Earth?

• The Earth's rotation on its axis

• The tilt of the Earth's axis

• The Earth's orbit around the sun

• The moon's orbit around the Earth

How does the lunar cycle affect marine organisms?

• It alters the color of the water

• It changes the temperature of the water

• It affects the salinity of the ocean

• It influences tidal rhythms

What are circadian rhythms?

• Rhythms that occur every 12 hours

• Rhythms that occur every 90 minutes

• Rhythms that occur once a year

• Rhythms that occur approximately every 24 hours

What is the role of the SCN in mammals?

• It manages the immune response

• It coordinates biological clocks throughout the body

• It regulates the body's temperature

• It controls the digestive system

Which of the following is an example of an ultradian rhythm?

• Seasonal migration

• 90-minute sleep cycles

• Annual hibernation

• 24-hour sleep-wake cycle

What are infradian rhythms?

• Rhythms that occur every hour

• Rhythms shorter than 24 hours

• Rhythms that occur every 24 hours

• Rhythms longer than 24 hours