Central Idea Practice

how glaciers are formed

where the biggest glaciers in the world are found

how glaciers were first discovered

melted snow

ice crystals that join together after being packed down by heavy layers of snow

parts of the ocean that have frozen and broken away

the glacier moves

they join together to form a glacier

they push snow crystals under the surface together, forming pellets

what colors are in a rainbow

where rainbows come from

where you might see rainbows

a combination of colors

white

yellow

Sunlight is broken up by raindrops in the sky

there is no light

clouds separate the Sun's light from raindrops in the sky

how pelicans use their pouches to catch fish

where pelicans live

what a pelican eats

there isn't enough room in her stomach to fully digest all of her food

so that she can empty out the food that her body doesn't need

so that her babies can feed from the pouch

thirty pounds

fifteen pounds

twelve quarts