8. There are different characteristics for each of the states of matter. Which statement
describes a difference between solids and liquids?
2. Temperatures can change a solid to a liquid, but cannot change a liquid to a solid.
b. Solids have a definite volume, and liquids do not have a definite volume.
c. The particles in a solid are much closer together than the particles in a liquid.
d. Solids take on the shape of their containers, and liquids maintain their own
shapes.
9. Which of the following is a property of both liquids and gases, but not solids?
a. can flow
b. can be compressed
c. has a definite shape
d. has a definite texture
10. When you heat a sample of a solid, the particles that make up the solid:
a. Get bigger
b. Loose mass
c. Move faster
d. Slow down
Use the choices (a) physical change (b) physical characteristic (c) chemical change (d) chemical
characteristic for questions 11 - 19.
11. Eating and digesting cheese pizza.
12. Leaves are green.
13. Iodine turning a piece of bread black.
14. Flammability
15. Crumbling a piece of paper
16. Ability to rust
17. Ice melting
18. Magnetism
19. A solid is crushed into a powder
20. Which of the following is NOT a characteristic of a compound?
a. has different properties from the elements that formed it
b. pure substance made of two or more elements
c. different samples have different properties
d. can be represented by a chemical formula
Qgonous mixture that is very evenly mixed.

The particles of solids are much more close together when compared to the particles of liquids. Solids and liquids are typically both states of matter with striking differences. Below are some characteristics of solids:

Solid particles are closely and tightly held together by a very strong attractive force compared to any state of matter.
Solids usually have definite shape and a fixed volume. Liquids also have fixed volume that does not readily change.

Matter usually undergo phase changes from one physical state to another.

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Question 9:

a. can flow

Gases and liquids can flow and are both considered as fluid. A solid is a rigid substance that does not share this property of fluids.

A fluid is able to conform to the shape of the containers they occupy.
Solids have their own fixed shape and volume and do not fill containers.
Solids like liquids are typically in-compressible due to the nature of their packing. It takes a great deal of pressure of achieve little compression in liquids.
When a solid is forcefully compressed, it deforms it.
Both gases and liquids are called fluid due to their ability to flow readily.

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Question 10

c. Move faster

When a solid is heated, the particles moves faster. Eventually, the solid will turn into a liquid as the temperature increases.

The effect of heat on substances is that it increases the kinetic energy of the particles that makes them up. Solids are no exemption to this.

The particles of solids have an orderly arrangement of their atoms.

When heat is applied, the particles starts vibrating about their fixed position.

More heat will eventually cause the vibrational energy to overcome the forces binding the atoms together.

When this happens, the particles becomes free to move about.

Here, vibrational energy transitions into kinetic energy.

Therefore, heat is directly proportional to the kinetic energy of particles of solids.

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Questions 11-19 can be answered together. Let us make an attempt to understand the terms, physical change, physical characteristics, chemical change and chemical characteristics.

A physical change is a change in which the physical properties of matter such as it's form and state are altered. Physical change is typified by the following characteristics:

They are easily reversible i.e they can be returned back to their original form.

no production of new kinds of matter.

no mass change occurs in a physical change.

it requires little to no energy.

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A physical characteristics of a substance describes the properties of matter that tells us what a substance when no change is happening to it. Physical characteristics are perceived and observed with our senses or instruments or apparatus in a laboratory.

Examples of physical characteristics are color, taste, melting point, boiling point e.t.c

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A chemical change is a kind of change in which a new kind of matter is formed. Examples are Combustion, rusting of iron, precipitation, souring of milk.

They typically have the following properties:

they are not easily reversible.

leads to the production of new kinds of matter

involves changes in mass.

requires considerable amount of energy.

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Chemical characteristics of matter are properties that tells about what a substance can do as regards to whether or not it reacts with other substances.

Examples are flammability, rusting of iron, decomposition of water electric current e.t.c

Chemical properties are results of the valence electrons in the outermost shell of an atom.

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Now to the answer:

11. chemical and physical change

12. physical characteristics

13. chemical change

14. chemical characteristics

15. physical change

16. Chemical characteristics

17. physical change

18. physical property.

19. Physical change

Question 20

c. different samples have different properties

All different samples of a compound have the same properties. A sample is a fraction of a whole substance. If different samples are taken from a compound, they will all have the same chemical properties.

A compound forms when two or more elements combines together.

Properties of compounds are distinct and different from the individual elements that combined in its make up.

Compounds are usually represented by chemical formula.

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