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Science Launch G2 / Week 09 / Thursday
4/6
Week 09 · Fast and Slow Changes

Thursday

The river and the canyon
// Earth changes quickly or slowly
⏱ about 15 min

Thursday: The river and the canyon

Nova shows a deep, rocky canyon with a river at the bottom.

"Did the river cut that whole canyon?" Rocket asks.

Raven studies the layers of rock. "What do you notice?"

Nova blinks. "Hint: the river has been working for millions of years."

A slow river carving

Grand Canyon is in Grand Canyon National Park.

The Colorado River runs through it.

The river has carved away rock for five to six million years.

Weathering also breaks rocks into tiny grains, like sand.

Erosion is when water or wind carries bits of rock away.

CANYON CHECK
  • Read the question.
  • Tap your answer.
What river carved Grand Canyon?
Is carving a canyon a fast or slow change?
SentenceTrue or false?
Erosion carries bits of rock away.?
Grand Canyon was carved in one day.?
Rocks can break into tiny grains.?
WHY THIS EXERCISEThe river has carved for millions of years.
Try it
Look at a picture of a river.
Where might it carry sand and mud?
RIVER AT WORK
  • Read the question.
  • Tap your answer.
Where is the river in the canyon?
What is a canyon?
How long has the river carved rock?
What does weathering do to rocks?
SentenceTrue or false?
The Colorado River runs through Grand Canyon.?
Wind can carry bits of rock away.?
Carving a canyon is a fast change.?
Raven saw layers of rock.?
WHY THIS EXERCISERivers carve canyons slowly over a very long time.
Draw a canyon with a river at the bottom.

Word Spot: hear, without, second

Here are new sight words.

Look at each word. Say it. Spell it.

Hear: H-E-A-R.

Without: W-I-T-H-O-U-T.

Second: S-E-C-O-N-D.

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.
I can ___ the birds singing.
Do not cross the street ___ a grown-up.
Who came in ___ place?

Canyon-sized learning! Tomorrow we sort fast and slow changes.

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