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V. ASSESSMENT
Date: Sept. 28, 2021
Directions: Choose the letter of the correct answer. Write your answers on your answer
sheet.
1. Which substance consists of two or more elements which have been combined chemically?
A. element
D. solute
B compound
C. mixture
2. Which one is a pure substance that cannot be split up into two or more simpler
substance?
A atom
B element
C. compound
3. Which of the following is represented by a chemical symbol
A element
B. compound
C. mixture
4. Which of these substances is a compound?
A acetic acid
B. carbon
5. Which of the following is an element?
A Iron
B. Steam
Score:
C. chlorine
6. Which two elements, when combined, form
A. Hydrogen and oxygen
B. Hydrogen and Nitrogen
7. Which of the following are pure substances?
3.fog
1 tin
(15 points)
9. Which element has a chemical symbol of Fe?
A. Copper
B. Fluorine
C. Sugar
water?
C. Sodium and Oxygen
D. Sulfur and Oxygen
4. lime
C. Iron
D mixture
D. molecule
D. gold
2. brass
B. 1 and 3
A. 1 and 2
C. 1 and 4
D. 2 and 3
& Which of the following compound eliminates toxins from our body?
A. acetic acid B. carbon dioxide C. sugar
D. water
D. Water
C. Each water molecule is identical.
D. Water molecules are made up of different types of atoms.
DS
D. silver
10. Which of the following is a way in which elements and compounds are similar?
A. Elements and compounds are both pure substances.
B. Elements and compounds are both listed on the periodic table.
C. Elements and compounds are both made up of different kinds of atoms.
D. Elements and compounds can both be broken down by physical changes
11. Why is water considered a pure substance?
A. Water can be broken down by physical means.
B. Water can be combined with other substances by physical means.
12. Which importance of elements in the human body is correctly paired?
A. Chlorine found outside the cells which serves as a major electrolyte
B. Oxygen inside the cell essential in the conduction of nerve impulses
C. Phosphorous is important in bones and teeth and some amino acids.
D. Sodium is important in nerve conduction and fluid balance.

Sagot :

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