Stalactites and Stalagmites Formation

The video tutorial for second-grade students covers the differences between caves and caverns, focusing on the formations of stalagmites and stalactites. The teacher reviews a science project where students hypothesized whether these formations could grow outside of caverns. Observations from different classes are shared, showing varying degrees of success in growing formations. The teacher concludes that the experiment mimicked the natural process of formation growth, explaining how minerals in dripping water contribute to the development of stalagmites and stalactites.

What is the main difference between a cave and a cavern?

• Caves are larger than caverns.

• Caverns have formations, caves do not.

• Caves have more light than caverns.

• Caverns are underwater, caves are not.

Where do stalactites grow?

• In the water

• On the walls

• On the ceiling

• On the ground

What was the hypothesis of the science project?

• Stalagmites grow faster than stalactites.

• Stalactites and stalagmites cannot grow outside caverns.

• Stalactites and stalagmites can grow outside caverns.

• Stalactites grow faster than stalagmites.

What was observed in Mr. Rains' class project?

• No formations were observed.

• Large formations were observed.

• Only stalactites were observed.

• Slight formations were observed.

What was a notable observation in Miss Bennett's class project?

• Only stalagmites were observed.

• Formations were growing both upwards and downwards.

• Formations were only on the plate.

• No formations were observed.

How do stalactites and stalagmites form naturally?

• Through the accumulation of dust.

• Through the movement of rocks.

• From dripping water with minerals.

• By the growth of plants.

What role do minerals play in the formation of stalactites and stalagmites?

• They accumulate to form the structures.

• They prevent the formations from growing.

• They provide color to the formations.

• They dissolve the formations.

What was used in the experiment to mimic the natural process of formation?

• Sand

• Baking soda

• Sugar

• Salt

What happens when the water with baking soda drips from the yarn?

• It evaporates immediately.

• It leaves behind baking soda.

• It forms bubbles.

• It changes color.

What would happen if more water and baking soda were added to the experiment?

• The formations would continue to grow.

• The formations would stop growing.

• The formations would dissolve.

• The formations would change color.