Kitchen Chemists: teacher key

Mixing and Reactions, grade 2 edition, written for 2nd grade. Stir, shake and bake. See how salt, vinegar, baking soda and red cabbage change in the kitchen.

Read the book. Print this page for the key.

Questions and answers

1. What is a solution?
   • A mix that is the same all the way through (answer)
   • Two layers that stay apart
   • A cake that rises
2. What does baking powder do when you add water?
   • It turns to rust
   • It fizzes (answer)
   • It goes dry
3. Why does cake batter rise?
   • Heat turns it to oil
   • Salt dissolves in it
   • Gas bubbles form in it (answer)
4. What does red cabbage juice show in an acid and in a base?
   • The same color
   • Different colors (answer)
   • No color
5. Which is a sign that mixing made something new?
   • Bubbles of gas (answer)
   • Stirring
   • A cup

Words

• solution: an even mix
• react: change together
• batter: cake mix
• indicator: a color clue