Middle School Science- Introductory Unit
The quiz covers important points that were discussed in class.
You will have 15 questions, and 10 minutes to answer.
When you are done with the quiz:
1. Write down your score
2. Close the internet window
3. Continue with the powerpoint screen.
Good luck!
Questions and Answers
- 1.
A substance consisting of two or more substances mixed together. Not in fixed proportions, and not chemically bonded. (think salad)
Explanation
The correct answer is "mixture, a mixture, Mixture, A mixture." The explanation for this answer is that a mixture refers to a substance that is formed by combining two or more substances together without any fixed proportions or chemical bonding. An example of a mixture is a salad, where different ingredients like lettuce, tomatoes, and cucumbers are mixed together without any specific ratios or chemical reactions occurring between them.Rate this question:
- 2.
The smallest component of an element having chemical properties of the element.
Explanation
The correct answer is "atom." An atom is the smallest component of an element that retains the chemical properties of that element. It is the basic building block of matter and consists of a nucleus containing protons and neutrons, surrounded by electrons. The properties and behavior of elements are determined by the number and arrangement of atoms within them.Rate this question:
- 3.
That which has mass and occupies space.
Explanation
The given correct answer is "matter" or "Matter". Matter refers to anything that has mass and takes up space. It includes both tangible objects like plants, animals, and rocks, as well as intangible things like gases and energy. Matter is the fundamental substance that makes up the universe and is composed of atoms and molecules. It exists in various forms such as solids, liquids, and gases.Rate this question:
- 4.
A substance formed by a chemical union of two or more elements or ingredients in definite proportion by weight. (think soup).
Explanation
The given correct answer is "Compound." A compound is a substance that is formed when two or more elements or ingredients combine in a specific proportion by weight. This can be compared to making soup, where different ingredients are mixed together in a specific ratio to create a new substance. The repetition of the word "compound" and the use of both uppercase and lowercase letters suggest that the answer is emphasizing the importance of this term in the context of the question.Rate this question:
- 5.
The simplest structural unit of an element or compound.
Explanation
The correct answer is "molecule". A molecule is defined as the simplest structural unit of an element or compound. It consists of one or more atoms held together by chemical bonds. In this question, the term "molecule" is repeated multiple times, emphasizing its significance as the correct answer.Rate this question:
- 6.
Can an element or a compound also be classified as a molecule?
- A.
Yes
- B.
No
Correct Answer
A. YesExplanation
A molecule is the smallest unit of an element or compound.Rate this question:
-
- 7.
Can a mixture be composed of atoms?
- A.
Yes
- B.
No
Correct Answer
A. YesExplanation
Everything is composed of atoms.Rate this question:
-
- 8.
Can atoms be composed of elements?
- A.
Yes
- B.
No
Correct Answer
B. NoExplanation
Atoms are the smallest units. Elements are composed of atoms.Rate this question:
-
- 9.
Can compounds be composed of atoms?
- A.
Yes
- B.
No
Correct Answer
A. YesExplanation
Everything is composed of atoms.Rate this question:
-
- 10.
Known substances that cannot be separated into simpler substances and that singly or in combination constitute all matter.
Correct Answer
An element
element
an element
elementExplanation
The given correct answer is "An element." The explanation for this answer is that an element is a known substance that cannot be separated into simpler substances and that singly or in combination constitutes all matter. The repeated use of the term "element" in the question suggests that the answer is indeed "an element."Rate this question:
- 11.
Atoms, Compounds, Mixtures are all particles of Matter
- A.
Yes
- B.
No
Correct Answer
A. YesExplanation
As long as they have mass, and take up space, they are particles of matter.Rate this question:
-
- 12.
An atom is composed of compounds
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Everything is composed of atoms.Rate this question:
-
- 13.
Can a compound be composed of elements?
- A.
Yes
- B.
No
Correct Answer
A. YesExplanation
Yes, a compound can be composed of elements. A compound is a substance that is formed when two or more elements chemically combine. These elements can bond together in various ways, such as through ionic or covalent bonds, to form a compound with unique properties. Examples of compounds composed of elements include water (H2O), carbon dioxide (CO2), and sodium chloride (NaCl).Rate this question:
-
- 14.
Can a mixture be composed of elements?
- A.
Yes
- B.
No
Correct Answer
A. YesExplanation
Mixtures can be composed of elements, but elements cannot be composed of mixtures.Rate this question:
-
- 15.
What is the difference between a mixture and a compound?
- A.
They are not different.
- B.
The mixture is chemically bonded, the compound is not.
- C.
The mixture has ingredients mixed in definite proportion by weight, the compound does not.
- D.
The compound is chemically bonded, the mixture is not.
- E.
The mixture has a chemical union and ingredients mixed in definite proportion by weight, the compound does not.
Correct Answer
D. The compound is chemically bonded, the mixture is not.Explanation
Compound- a substance formed by a chemical union of two or more elements or ingredient in definite proportion by weight.
Mixture- a substance consisting of two or more substances mixed together. They are not mixed in fixed proportions, and are not joined by chemical bonding.Rate this question:
-
Back to top