Physical Science Final Exam

Front

What is current in a circuit?

Back

Current is the flow of electric charge, measured in Amperes (A).

Front

What happens to heat when a hand holds an ice cube?

Back

Heat flows from the hand to the ice cube, causing the hand to feel cold.

Front

What is a colloid?

Back

A colloid is a homogeneous mixture that is cloudy or milky and shows light scattering.

Front

What type of reaction is represented by 3Ca + 2AlCl3 → 3CaCl2 + 2Al?

Back

This is a single displacement reaction.

Front

What type of reaction is represented by 3KOH + H3PO4 → K3PO4 + 3H2O?

Back

This is a double displacement reaction.

Front

What is the definition of a closed circuit?

Back

A closed circuit is a complete electrical loop that allows current to flow.

Front

What is the difference between a solution and a suspension?

Back

A solution is a homogeneous mixture where solute is completely dissolved, while a suspension contains larger particles that can settle out.

Front

What is the principle of conservation of energy?

Back

Energy cannot be created or destroyed, only transformed from one form to another.

Front

What is thermal conductivity?

Back

Thermal conductivity is the ability of a material to conduct heat.

Front

What is the formula for calculating current?

Back

Current (I) = Voltage (V) / Resistance (R).