1What do you call an idea or explanation that you test trough study and experimentation?

2. Anything that occupies space, has mass weight and volume is known as?

3.Why solution is considered a homogenous mixture?

4. All of the following describes a solution EXCEPT____

5. Which is an example of solution?

6. the two components of solution are solute and solvent. which statement describe the solute?

7. In a chemistry class, Karen prepared a solution by mixing 25g of sugar in 80g of water. what are the concentration of the solute and solvent in percentage by mass?

8.  Which of the following statements is TRUE about elements and compounds?

9.Non-metalsare brittle and are normally used as an insulator while metals are hard, dense solid material. Which of the following elements are metals and non-metals?

1. Thefollowing substances are examples of compounds EXCEPT?

1. Metals are good conductors of heat and electricity. Which elements do NOT exhibit this property?

12. What is the maximum amount of solute that can be dissolved in a fixed amount of solvent at a given temperature?

1. All of the following affects the solubility of a solid in a liquid EXCEPT_______?

1. Whichof the following statements distinguishes pure substances from mixtures?

1. Mixturescan be separated by physical methods while pure substances cannot be separated. Which of the following groups contain only pure substances?

a.     Gold,copper, oxygen       b. Ammonia, vinegar,silicon       c.. Carbon dioxide, air, water

1. A gaseous material has a strong smell, evaporates quickly, particularly boils at33.34⁰C and melts at -77.73^oC. This material can be classified as?

1. Most solids dissolved faster in a liquid, when the liquid is___?

1. Elements that are in the same column are called a_____?

1. Have no uniform appearance instead they have two or more phases of matter.       

1. Why do you think that the sand in the beach don’t dissolve in water?

1. It is a kind of solution where it contains the maximum amount of solute dissolve in a given amount of  solvent?

1. Apart of the solution that dissolves the solute is known as?       

1. How does temperature affect solubility?

1. What is the common solvent in everyday life?

1. These are solutions which do not appear in nature instead they are made by man. Which  is an example of manufactured solution?

1. Variables that are expected to change?

1. Which of the following substances is an element?                                                     

1. 5g of NaCl is added to 100 ml of water. What is the percentage by mass?

1. What are the different ways of separating mixtures?

1. Copper, aluminum and gold are metals. Which INCORRECTLY describes metal?

1. Jerren was tasked by his science teacher to investigate on how fast sugar dissolves in cold and hot  water. Observing the fair testing what will be his  control variables?

1. How  will you describe a mixture out of salt and oil?

1. An electrical engineer is planning to install the electrical wires in a newly built house. He is planning to use copper wires. What characteristic of copper makes it ideal for electrical wirings?

1. Why are copper and aluminum used for carrying electrical currents and as utensils for cooking?

1. Some metals like silver and gold are used in making jewelry. What property of these metals is considered for this purpose?

1. Elements play an important role in the human body. Which elements and its function are correctly paired?

1. Why does “rust” form on some metallic materials?

1. In aqueous solution, the solvent used is?

1. Chlorine, iodine and bromine are nonmetals. What BEST distinguishes a nonmetal from a metal is its_____?

1. Table salt is a compound of the the two elements sodium and chlorine. Which of the following statements is true?

1. The main component of sand is?

1. The chemical symbol for mercury  is

1. In what group number that gold and silver belong?

1. Calcium chloride is a compound of the two elements calcium and chlorine. Which of the following statements is TRUE?

1. Sodium chloride dissolves in water very well. Which is NOT TRUE in the following statements?

1. What is the percentage concentration in the following solution: 4g of sucrose in 80grams water?

1. Something that can be dissolved in a solution is called.

1. How many grams of glucose (C₁₂ H₂₂ O₁₁) are needed to prepare 400mL of a 5% glucose solution?

1. What are the two (2) classes of matter?

a.     Atom and molecule

b.     Elementand compound

Substance and mixture

Which of the following is NOT an example of a compound?