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Science Launch G2 / Week 05 / Thursday
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Week 05 · Warm It, Cool It

Thursday

Changes that stay
// Heating and cooling change matter
⏱ about 15 min

Thursday: Changes that stay

Rocket watches a grown-up cook an egg for breakfast.

"Can we turn it back into a runny egg?" he asks.

Raven thinks about the ice. "What do you notice that is different?"

Nova blinks slowly. "Hint: can you freeze the egg back?"

"No," Rocket says. "It stays cooked!"

Some changes can be undone

Heating or cooling can change a material.

Some changes can be undone. We call them reversible.

Ice can melt, then freeze again. That change is reversible.

Some changes cannot be undone.

A cooked egg cannot turn back into a raw egg.

Paper that is heated and burned cannot turn back into paper.

ChangeCan it be undone?
ice melts into wateryes
water freezes into iceyes
an egg is cookedno
paper is burnedno
Safety first
Only a grown-up cooks or uses heat.
Never heat paper or anything else yourself.
UNDO IT?
  • Read the question.
  • Tap your answer.
A puddle freezes into ice. Can that be undone?
An egg is cooked. Can that be undone?
SentenceTrue or false?
Melting ice is a change that can be undone.?
Burned paper can turn back into paper.?
WHY THIS EXERCISEBurning changes paper for good.
CAN IT GO BACK?
  • Read the question.
  • Tap your answer.
What does reversible mean?
Paper is burned. Can it turn back into paper?
Who uses heat in our lessons?
Ice melts into water. Can that be undone?
SentenceTrue or false?
Freezing water is reversible.?
Every change can go back.?
Heating can change a material.?
Children should heat paper themselves.?
WHY THIS EXERCISESome changes go back, and some stay for good.
Draw one change that can be undone and one that cannot.

Word Spot: something, seemed, next

Here are new sight words.

Look at each word. Say it. Spell it.

Something: S-O-M-E-T-H-I-N-G.

Seemed: S-E-E-M-E-D.

Next: N-E-X-T.

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 hear ___ in the grass.
The dog ___ happy to see us.
What comes ___ in the pattern?

Super thinking! Tomorrow we spot warming and cooling around us.

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