Did You Know? The 17-Year Cicada.

The video explains the lifecycle of cicadas in the northeastern US, focusing on their 17-year underground nymph stage. After this period, they emerge when the soil reaches a specific temperature, molt, and live as adults for 4-6 weeks to mate and lay eggs. Scientists believe cicadas track time through changes in tree sap, which they consume, aligning with seasonal cycles.

Where do cicada nymphs spend most of their early life?

• In the treetops

• Underground

• In water

• On leaves

What triggers cicada nymphs to emerge from the ground?

• The presence of predators

• A specific soil temperature

• The sound of rain

• The growth of new leaves

How long do adult cicadas typically live?

• Two years

• Several months

• Four to six weeks

• One year

What is one theory about how cicadas keep track of time underground?

• They listen to the sounds of the forest

• They sense changes in tree sap

• They use the position of the sun

• They count the number of days

What role does tree sap play in the cicadas' life cycle?

• It helps them fly

• It is used to build their nests

• It attracts predators

• It provides food and helps them sense time