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Kristen goes to the beach with her family on a summer afternoon. Her parents set up a
beach umbrella as a protection from the bright sunlight, and they place a small folding
table under it. Kristen takes a can of lemonade from an ice chest and drinks half of it. Then
she places the can on the table and walks down to the water. The dry sand feels very hot to
her feet, but the wet sand at the water’s edge, being constantly lapped by tiny waves, feels
cool. After about an hour of walking along the beach, Kristen returns to the umbrella. She
picks up her can of lemonade, and it is now warm.
1. Why does the dry sand feel hot to Kristen’s feet?

2. Why does the wet sand feel cool to Kristen’s feet?

3. Why has Kristen’s can of lemonade become warm?

4. What example of thermal equilibrium can you identify in this scenario?

Populations of blue-winged warblers, a type of bird, migrate south in the winter and return to canadian breeding grounds in the spring. as global temperatures have increased due to climate change, spring has started arriving in the warbler's breeding grounds earlier in the year, before the warblers return. warblers now arrive at their breeding grounds too late to select ideal nesting sites and to feed on important early-spring food sources how are populations of blue-winged warblers most likely to be affected by the earlier arrival of spring? o a. populations will go extinct since the warblers will stop migrating to breeding grounds. b. populations will be unaffected since most species can quickly adapt to effects of climate change. c. populations will increase since warmer temperatures are generally beneficial to survival, d. populations will decline since individuals will be less likely to successfully reproduce, reset next

Sediment layers stop lateral spreading when: they encounter a barrier they encounter an opposing current they run out of additional sedimentary material

What is true of all organisms in the kingdoms protista, plantae, fungi, and animalia? a. they are multi-celled. b. they are photosynthetic. c. they have cells that contain membrane-bound organelles. d. they contain cells that lack membrane-bound organelles.