Question

on a walk in the woods, lena kicks a pinecone into a puddle. thirty minutes later, she walks past the same puddle and notices that the pinecone looks different! before, the scales on the outside of the pinecone were spread out. now, the scales are tightly closed. she wonders what factors affect how quickly a pinecone closes. so, she decides to design an experiment. she has the following supplies available: five small fresh pinecones five small one - year - old pinecones five large fresh pinecones five large one - year - old pinecones ten identical glass jars warm water cold water using only these supplies, which questions can lena investigate with an experiment? select all that apply. when pinecones are placed in warm water, do the scales on one - year - old pinecones close more slowly than the scales on fresh pinecones? do the scales close faster on pinecones that are placed in cold water or in warm water? do the scales close faster on pinecones that are partially submerged or completely submerged in cold water? when pinecones are placed in cold water, do the scales on large pinecones or small pinecones close faster?

Explanation:

Lena has fresh and one - year - old pinecones of different sizes, warm and cold water, and glass jars. She can use these to test the effects of age (fresh vs one - year - old), water temperature (warm vs cold), and size (large vs small) on pinecone scale - closing speed. She also has enough jars to test partial and complete submersion.

Answer:

When pinecones are placed in warm water, do the scales on one - year - old pinecones close more slowly than the scales on fresh pinecones?
Do the scales close faster on pinecones that are placed in cold water or in warm water?
Do the scales close faster on pinecones that are partially submerged or completely submerged in cold water?
When pinecones are placed in cold water, do the scales on large pinecones or small pinecones close faster?