Page 112 - Innovator's Science-8

Gold as a Metal
A er extrac on, gold is refined and used as a metal. It is a pure element (symbol: Au) with typical
metallic proper es:
• Lustrous (shiny)
• Malleable (can be shaped)
• Duc le (can be drawn into wires)

• Good conductor of electricity
• Used in jewelry, electronics, and currency.

Put on your
Thinking cap Problem Solving Skills

A. Darken the correct options in the OMR Sheet: OMR Sheet
1. Which of the following is an element?

a. Water b. Sodium
c. Sugar d. Air
2. A compound is formed when Wrong Methods
a. Two solids are mixed Correct Method

b. Two gases are combined physically
c. Two or more elements combine chemically 1. a b c d
d. One element changes state

3. Which of the following is a mixture?
2. a b c d
a. Carbon dioxide b. Air
c. Salt d. Glucose
4. What is the smallest unit of an element? 3. a b c d

a. Molecule b. Cell
c. Atom d. Compound 4. a b c d
5. Which of the following has a variable composition?

a. Element b. Compound
5. a b c d
c. Mixture d. Molecule

B. Fill in the blanks. Observational Skills
1. A substance made of only one kind of atom is called an ________________.
2. A mixture that has uniform composition throughout is called a mixture ________________.

3. Two or more elements chemically combined form a ________________.
4. A combination of substances not chemically bonded is called ________________.
5. ________________ are the building block of all substances.

C. State whether the given statements are True (T) or False (F). Problem Solving Skills

1. Matter is anything that has mass and occupies space.

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Science-8