Semester 1 Final Exam (B)

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances, often accompanied by energy changes, such as heat or light. Example: Adding a red liquid to a white powder that foams up.

Front

Where is maximum potential energy on a roller coaster?

Back

Maximum potential energy is found at the top of a big hill on a roller coaster, where the height is greatest.

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. Example: Hydrogen (H) is an element.

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What is the conversion of energy in a glow stick?

Back

The light from a glow stick is a conversion from chemical energy to radiant energy.

Front

What are electric and thermal energy?

Back

Electric energy is the energy of moving electrons, while thermal energy is the energy that comes from the temperature of matter. Both are forms of energy used in various applications.

Front

What is matter?

Back

Matter is anything that has mass and takes up space. It can exist in different states: solid, liquid, and gas.

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What is an atom?

Back

An atom is the smallest unit of an element that retains the properties of that element. It consists of protons, neutrons, and electrons.

Front

What is a chemical reaction?

Back

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another, involving the breaking and forming of bonds.

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What is potential energy?

Back

Potential energy is the stored energy in an object due to its position or state. Example: A book on a shelf has potential energy due to its height.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object in motion. The faster an object moves, the more kinetic energy it has.