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Science Launch G2 / Week 09 / Monday
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Week 09 · Fast and Slow Changes

Monday

A giant stone arch
// Earth changes quickly or slowly
⏱ about 15 min

Monday: A giant stone arch

Raven shows a photo of a red stone arch.

"It looks like a giant doorway!" Rocket says.

"Who built it?" he asks.

Raven zooms in. "What do you notice about the cracks?"

Nova hums. "Hint: water and ice did the work. Very, very slowly."

Slow changes

Some changes to Earth happen very slowly.

In Arches National Park, snowmelt fills cracks in the rock.

The water freezes and gets bigger.

The ice breaks off chunks of sandstone.

Little by little, rock walls become arches.

HOW AN ARCH FORMS
  • Tap a card.
  • Then tap its spot.
1First
2Next
3Then
4Last
SLOW CHANGE CHECK
  • Read the question.
  • Tap your answer.
What breaks bits off the rock to make arches?
Do arches form fast or slowly?
SentenceTrue or false?
Water gets bigger when it freezes.?
People built the stone arches.?
WHY THIS EXERCISEWater and ice shaped the arches over a long time.
ARCH CHECK
  • Read the question.
  • Tap your answer.
What color was the stone arch?
What fills the cracks in the rock?
What kind of rock breaks off?
What comes right after water fills a crack?
SentenceTrue or false?
Some changes to Earth happen very slowly.?
Ice can break off bits of rock.?
An arch forms in one afternoon.?
Arches National Park has stone arches.?
WHY THIS EXERCISEWater and ice break rock little by little.
Draw a stone arch. Show a crack with ice inside.

Word Spot: these, those

Here are new sight words.

Look at each word. Say it. Spell it.

These: T-H-E-S-E.

Those: T-H-O-S-E.

FIND THE WORD
  • Listen to the word.
  • Tap it.
Find the word you hear.
Find the word you hear.
Find the word you hear.
Find the word you hear.
FILL THE GAP
  • Listen to the sentence.
  • Tap the missing word.
Look at ___ leaves.
___ clouds are big and gray.

Super thinking! Tomorrow we see changes that happen fast.