Section 1 Chapter 1

1.

___ is the study of matter and how matter changes
- A.
  
  Mass
- B.
  
  Science
- C.
  
  Matter
- D.
  
  Chemistry
Correct Answer
D. Chemistry

Explanation
Chemistry is the correct answer because it is the scientific study of matter and how matter undergoes various changes. It involves the study of the properties, composition, structure, and behavior of substances, as well as the energy changes that occur during chemical reactions. Chemistry encompasses a wide range of topics, including the study of atoms, molecules, elements, compounds, and the interactions between them. By understanding the principles of chemistry, scientists can explain and predict the behavior of matter, which has numerous practical applications in fields such as medicine, materials science, and environmental science.

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2.

Is a characteristic of a pure substance that can be observed without changing it into another substance
- A.
  
  Chemical Properties
- B.
  
  Physical Properties
- C.
  
  Atoms
- D.
  
  Compund
Correct Answer
B. Physical Properties

Explanation
Physical properties are characteristics of a substance that can be observed or measured without changing the substance into another substance. These properties include color, odor, density, melting point, boiling point, and solubility. Unlike chemical properties, physical properties do not involve any chemical reactions or changes in the composition of the substance. Therefore, physical properties can be observed and measured without altering the identity of the substance, making them a characteristic of a pure substance.

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3.

Is a characteristic of a pure substance that describes its ability to change into different substances
- A.
  
  Physical Propeties
- B.
  
  Science
- C.
  
  Chemical Propeties
- D.
  
  Element
Correct Answer
C. Chemical Propeties

Explanation
Chemical properties refer to the characteristics of a substance that describe its ability to undergo chemical reactions and transform into different substances. These properties are related to the substance's composition and its interactions with other substances. Unlike physical properties, which describe the substance's appearance and behavior without changing its composition, chemical properties involve the rearrangement of atoms and the formation of new substances. Therefore, the ability to change into different substances is a defining characteristic of chemical properties.

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4.

Groups of two or more atoms held together by chemical bonds.
- A.
  
  Molecules
- B.
  
  Compound
- C.
  
  Chemicals
- D.
  
  Atoms
Correct Answer
A. Molecules

Explanation
Molecules are formed when two or more atoms are bonded together by chemical bonds. This definition accurately describes the concept of molecules, as they are the smallest units of a compound that retain the chemical properties of that compound. Therefore, molecules are the correct answer to the question.

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5.

Is made of two or more substances elements,compounds or both- that are together in the same place
- A.
  
  Atom
- B.
  
  Physical Properties
- C.
  
  Mixture
- D.
  
  Chemistry
Correct Answer
C. Mixture

Explanation
A mixture is a combination of two or more substances, such as elements or compounds, that are physically combined and can be separated by physical means. In a mixture, the substances retain their individual properties and do not chemically react with each other. Therefore, a mixture is made up of different components that are together in the same place but can be distinguished from one another.

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6.

You can see the different parts in this mixture
- A.
  
  Heterogeneous
- B.
  
  Homogenus
- C.
  
  Chemical
- D.
  
  Mixture
Correct Answer
A. Heterogeneous

Explanation
The given statement suggests that the different parts of the mixture can be seen, indicating that it is not uniform throughout. This characteristic is typical of a heterogeneous mixture, where the components are not evenly distributed and can be easily distinguished. On the other hand, a homogeneous mixture would appear uniform throughout, with no visible separation of its components. The term "chemical" does not provide any information about the nature of the mixture, but rather refers to the fact that it is composed of different chemicals.

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7.

This mixture is so evenly mixed that you can’t see the parts
- A.
  
  Mixture
- B.
  
  Homogenus
- C.
  
  Chemical
- D.
  
  Hetergenus
Correct Answer
B. Homogenus

Explanation
The correct answer is "Homogenus" because it accurately describes a mixture that is evenly mixed, with the parts not visible to the naked eye. This suggests that the components of the mixture are uniformly distributed throughout, creating a uniform composition.

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8.

Has mass and takes up space

Correct Answer
Matter

Explanation
Matter is the correct answer because it refers to anything that has mass and takes up space. Matter can exist in various forms such as solid, liquid, or gas. It includes everything we can see, touch, and feel in our everyday lives.

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9.

_____ is a pure substance that can’t be down into any other substances

Correct Answer
Element

Explanation
An element is a pure substance that cannot be broken down into any other substances. Elements are the building blocks of matter and are composed of atoms with the same number of protons. Each element has its own unique set of properties and characteristics. Examples of elements include oxygen, carbon, and gold.

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10.

Is the basic particle from which all elements are made.

Correct Answer
Atoms

Explanation
Atoms are the basic particles from which all elements are made. They are the smallest unit of matter that retains the chemical properties of an element. Atoms are composed of protons, neutrons, and electrons. Protons have a positive charge, neutrons have no charge, and electrons have a negative charge. The arrangement and combination of these particles determine the properties and characteristics of different elements. Therefore, atoms are the fundamental building blocks of matter and are responsible for the diversity of elements in the universe.

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Section 1 Chapter 1

___ is the study of matter and how matter changes

Is a characteristic of a pure substance that can be observed without changing it into another substance

Is a characteristic of a pure substance that describes its ability to change into different substances

Groups of two or more atoms held together by chemical bonds.

Is made of two or more substances elements,compounds or both- that are together in the same place

You can see the different parts in this mixture

This mixture is so evenly mixed that you can’t see the parts

Has mass and takes up space

_____ is a pure substance that can’t be down into any other substances

Is the basic particle from which all elements are made.