Why Does Soap Actually Clean? — Questions and answers
Read the full story
According to Amara, why wouldn't plain water wash the paint off Zain's hands?
Choices
- A. The paint was too old.
- B. The water was not warm enough.
- C. The paint is oily, and oil and water don't mix. ✓
- D. Zain wasn't scrubbing hard enough.
Answer: C. The paint is oily, and oil and water don't mix.
From page 2
What does Ms. Hargrove call the bar of soap?
Choices
- A. A magic wand
- B. The secret peacemaker ✓
- C. A silly toy
- D. A tricky puzzle
Answer: B. The secret peacemaker
From page 3
Where did Agnes Pockels first figure out this incredible idea about liquids?
Choices
- A. In a fancy university lab
- B. In her own kitchen sink ✓
- C. In a German school
- D. In a science museum
Answer: B. In her own kitchen sink
From page 5
What happened to the black pepper flakes when Ms. Hargrove touched the water with soap?
Choices
- A. They sank to the bottom.
- B. They changed color.
- C. They shot away to the edges of the bowl. ✓
- D. They gathered in the center.
Answer: C. They shot away to the edges of the bowl.
From page 6
According to Ms. Hargrove, what do soap molecules do to the water's tight surface?
Choices
- A. They make it stronger.
- B. They break it. ✓
- C. They make it colder.
- D. They add more water to it.
Answer: B. They break it.
From page 7
What did Nadia think the soap was, besides just soap?
Choices
- A. A secret key ✓
- B. A kitchen decoration
- C. A new kind of toy
- D. A big, heavy stone
Answer: A. A secret key
From page 10