Question

a. a solution of two solids
b. a mixture of particles with different densities
c. a mixture of particles of different sizes
d. a mixture of magnetic and nonmagnetic items

1. the figure shows physical and chemical changes as someone prepares an egg. which is a correct statement about one step in this process?

a. as the shell cracks, a new type of matter forms.
b. as the egg cooks, a new type of matter forms.
c. the total weight of the eggshell changes as it cracks into pieces.
d. the total volume of the egg changes as the egg is poured from the shell into the pan.

Explanation:

• Option a: Cracking the shell is a physical change (no new matter forms), so a is wrong.
• Option b: Cooking an egg (like frying) involves proteins denaturing, forming new substances (chemical change), so b is correct.
• Option c: Cracking the shell is physical; mass (weight) of the shell remains the same (conservation of mass), so c is wrong.
• Option d: Pouring the egg from the shell is a physical change; the total volume of the egg (contents) doesn't change just from pouring (assuming no spillage, and it's a physical transfer), so d is wrong.

Answer:

b. As the egg cooks, a new type of matter forms.