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

Wednesday

Investigation: Sand hill changes
// Earth changes quickly or slowly
⏱ about 15 min

Wednesday: Sand hill changes

Rocket and Raven build two sand hills in a tray.

"Let me pour a whole cup on one!" Rocket says.

Raven picks up a spoon. "I will drip water slowly on the other."

Nova hovers. "Hint: a big splash moves more sand at once."

"What will we notice?" Raven asks.

Your investigation

You will compare a fast change and a slow change to sand.

  • a baking tray or a plastic tub
  • sand or soil
  • two cups of water
  • a spoon
Safety first
Work outside or on a towel.
Keep sand away from eyes.
Wash your hands when you finish.
  1. Build two small hills of damp sand in the tray.
  2. Pour one cup of water quickly on the first hill.
  3. Drip spoonfuls of water slowly on the second hill.
  4. Look at both hills after one minute.
MAKE A PREDICTION
  • Read the question.
  • Tap your answer.
Which hill do you predict will change more in one minute?
If you dripped all day, would the hill change?
HillWhat did it look like after one minute?
fast pour
slow drip
After testingTrue or false?
Water can move sand.?
Slow changes never add up.?
WHY THIS EXERCISELittle by little, slow changes add up to big ones.
For a grown-up
Damp sand holds its shape best.
Garden soil works too.
SAND HILL CHECK
  • Read the question.
  • Tap your answer.
How did Raven add water?
What kind of sand holds its shape best?
When do you look at both hills?
Why keep sand away from eyes?
SentenceTrue or false?
We built two hills.?
Both hills got water the same way.?
Garden soil works too.?
WHY THIS EXERCISEOne fast pour and one slow drip let us compare.

Word Spot: carry, state, book

Here are new sight words.

Look at each word. Say it. Spell it.

Carry: C-A-R-R-Y.

State: S-T-A-T-E.

Book: B-O-O-K.

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.
Please help me ___ the box.
Which ___ do you live in?
Open your ___ to page five.

You made fast and slow changes! Tomorrow we visit a giant canyon.

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