Rocket and Raven look at their test pans again.
"My stick wall held some soil," Rocket says.
"My leaves held soil too," Raven says. "What do you notice that is different?"
Nova beeps. "Great discovery! Every design has strengths and weaknesses."
Engineers test more than one design.
A strength is something a design does well.
A weakness is something it does not do well.
Comparing helps engineers pick or improve a design.
Let us review this week's sight words.
Look at each word. Say it. Spell it.
Use: U-S-E.
Very: V-E-R-Y.
Wash: W-A-S-H.
Which: W-H-I-C-H.
Later: L-A-T-E-R.
Miss: M-I-S-S.
Idea: I-D-E-A.
Enough: E-N-O-U-G-H.
Face: F-A-C-E.
Watch: W-A-T-C-H.
Far: F-A-R.
You are a land-saving engineer! Next week we make maps.