identify the physical and chemical questions

Question

You are making pancakes. First, you (mix together flour, sugar, and some baking soda) (1. chemical or physical). In a separate bowl, you (melt some butter) (2.) and then (add eggs and milk and stir) (3.). Next, you combine the two mixtures and stir some more. You see (little bubbles start to rise) (4.) in the batter.

Answer 1

Let's identify the physical and chemical questions in your pancake-making process:

1. Mixing flour, sugar, and baking soda - This is a physical change. You are combining ingredients without changing their chemical identities.

2. Melting some butter - This is also a physical change. Melting butter changes its state from solid to liquid but does not alter its chemical composition.

3. Adding eggs and milk and stirring - This is a physical change. You're mixing ingredients together without changing their chemical structure.

4. Little bubbles start to rise in the batter - This indicates a chemical change. The bubbles are a result of the chemical reaction between the baking soda and acidic ingredients (like eggs or milk), producing carbon dioxide gas, which causes the batter to rise.

In summary:

• (1) Physical Change
• (2) Physical Change
• (3) Physical Change
• (4) Chemical Change