Question

multiple choice
identify the choice that best completes the statement or answers the question.

1. which part of the illustration below shows the particles in a heterogeneous mixture?
2. what happens to the energy in a substance when it changes state?

a. it is changed into matter.
b. the energy remains unchanged.
c. it is destroyed.
d. it changes form, but is neither destroyed nor increased.

1. if a mixture is not uniform throughout, it is called

a. homogeneous.
b. heterogeneous.
c. a solution.
d. chemically bonded.

1. a mixture is

a. any group of elements that are chemically bonded to one another.
b. any substance with a uniform composition.
c. a blend of any two or more kinds of matter, as long as each maintains its own unique properties.
d. a combination of pure substances bonded chemically.
short answer

1. the liquid state of matter can be described as
2. what is the definition of a chemical change
3. a state of matter in which a material has no definite shape but has a definite volume is the ____ state.

Explanation:

1. In a heterogeneous mixture, the components are not uniformly distributed. Looking at the illustrations, the one with non - uniform particle distribution represents the heterogeneous mixture.
2. According to the law of conservation of energy, when a substance changes state, energy changes form (e.g., from heat energy to potential energy in phase change), but its quantity remains the same as it is neither created nor destroyed.
3. By definition, a non - uniform mixture throughout is called a heterogeneous mixture.
4. A mixture is a blend of two or more kinds of matter where each component maintains its own unique properties.

For short - answer questions:

1. The liquid state of matter has particles that are close together but can move past one another, allowing it to flow and take the shape of its container while having a definite volume.
2. A chemical change is a process in which one or more substances are changed into new substances with different chemical properties.
3. A state of matter with no definite shape but a definite volume is the liquid state.

Answer:

1. a.
2. d.
3. b.
4. c.

Short Answer:

1. Particles are close together and can move past one another, taking the shape of the container while having a definite volume.
2. A process in which one or more substances are changed into new substances with different chemical properties.
3. liquid