Mid-Term Exam Review 2023

Front

What is the atomic structure of an atom?

Back

An atom consists of a nucleus containing protons and neutrons, surrounded by electrons in energy levels.

Front

How many energy levels does lithium have?

Back

Lithium has 2 energy levels.

Front

What is a chemical reaction?

Back

A chemical reaction is a process where substances change into new substances with different properties.

Front

What evidence indicates a chemical reaction has occurred when baking a cake?

Back

The ingredients formed a new substance after they were cooked in the oven.

Front

What is the role of gravity in motion?

Back

Gravity is a force that pulls objects toward each other, affecting their velocity and direction of motion.

Front

What happens to a coin tossed in the air?

Back

It travels upward, slows down, momentarily stops, and then falls back down, accelerating due to gravity.

Front

What is net force?

Back

Net force is the total force acting on an object, taking into account all individual forces and their directions.

Front

If two students push a crate in opposite directions, what happens?

Back

The crate will move in the direction of the greater force applied.

Front

What is the electrical charge of an atom with equal protons and electrons?

Back

The atom is electrically neutral.

Front

How do you calculate the net force on an object?

Back

Net force is calculated by adding all the forces acting on the object, considering their directions.