Mid-term Exam Part 1

Front

What is a metalloid?

Back

A metalloid is an element that has properties of both metals and nonmetals. An example is Arsenic (As).

Front

What is the best evidence of a chemical change?

Back

A flame burns on the surface of a solid, indicating a chemical change.

Front

What is net force?

Back

Net force is the sum of all forces acting on an object.

Front

What is the chemical formula for Baking Soda?

Back

The chemical formula for Baking Soda is NaHCO₃.

Front

How many elements are in Baking Soda?

Back

Baking Soda is made up of 4 elements: Sodium (Na), Hydrogen (H), Carbon (C), and Oxygen (O).

Front

What is potential energy?

Back

Potential energy is the energy stored in an object due to its position or height.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object in motion.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.

Front

What is the law of conservation of energy?

Back

The law of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.

Front

What is an example of a chemical change?

Back

An example of a chemical change is burning wood, which produces ash and smoke.