STAAR Science Review part 1

Front

What are the two subatomic particles found inside the nucleus of an atom?

Back

Protons and neutrons.

Front

In which direction does a warm front typically move?

Back

South to north.

Front

What do arrows represent in the context of forces?

Back

Direction and strength of a force.

Front

What is the atomic number of an element with 3 protons?

Back

3.

Front

Why does hot air rise?

Back

Warm air is less dense than cool air.

Front

What is the definition of an atom?

Back

The basic unit of a chemical element, consisting of a nucleus surrounded by electrons.

Front

What is the role of protons in an atom?

Back

Protons determine the atomic number and identity of an element.

Front

What is the role of neutrons in an atom?

Back

Neutrons contribute to the mass of an atom and stabilize the nucleus.

Front

What is density?

Back

Density is the mass of an object divided by its volume.

Front

What is a force?

Back

A push or pull that can cause an object to accelerate.