Crimebusters (Science Olympiad Division B)

Front

Which powder does NOT dissolve in water?

Back

Sand does not dissolve in water.

Front

What metal is gray and reacts with HCl after a short delay, giving off no odor?

Back

The metal is Aluminum.

Front

Which powder is used to produce plaster of Paris?

Back

Gypsum is used to produce plaster of Paris.

Front

What is the area indicated by 'A' in a fingerprint diagram known as?

Back

The area is known as the Core.

Front

Which powder may be found in a heat pack?

Back

Sodium Acetate may be found in a heat pack.

Front

What is the chemical formula for Sodium Acetate?

Back

The chemical formula for Sodium Acetate is C2H3NaO2.

Front

What is Gypsum primarily composed of?

Back

Gypsum is primarily composed of calcium sulfate dihydrate (CaSO4·2H2O).

Front

What is the reaction of Aluminum with hydrochloric acid?

Back

Aluminum reacts with hydrochloric acid to produce aluminum chloride and hydrogen gas.

Front

What is the significance of the Core in fingerprint analysis?

Back

The Core is a central point in a fingerprint pattern, important for classification.

Front

What is the main use of Plaster of Paris?

Back

Plaster of Paris is used for casting and molding in construction and art.