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.

1. what is one difference between a mixture and a compound?

a. a compound can only be separated into its components by chemical means.
b. a mixture must be uniform in composition

Explanation:

• For question 25: Cracking an eggshell is a physical change. Cooking an egg causes a chemical change as proteins in the egg denature and new substances are formed. The weight of the egg - shell doesn't change just by cracking, and volume of the egg doesn't change when poured from the shell.
• For question 26: A compound has a fixed ratio of elements and can only be separated into its components by chemical means. A mixture can be heterogeneous (non - uniform) and can be separated by physical means.

Answer:

1. b
2. a