Which statement correctly describes the relationship between thermal energy and particle movement?
1 point
As thermal energy increases, there is less particle movement.
As thermal energy increases, particle movement does not change.
As thermal energy increases, it is not possible to predict particle movement.
As thermal energy increases, there is more particle movement.
As thermal energy increases, there is more particle movement.
What happens to the density of a material if you have a larger piece of it?
1 point
The density will be smaller because the mass remains the same as the volume increases.
The density will remain the same because mass and volume will remain the same.
The density will remain the same because mass and volume will both increase in the same way.
The density will be greater because the mass increases but the volume remains the same.
The density will remain the same because mass and volume will both increase in the same way.
Cobalt has a mass number of 59 and an atomic number of 27. A student wants to create a model of a cobalt atom. Which statement about the model is correct?
1 point
The model should show 27 protons and 32 neutrons.
The model should show 59 protons and 27 neutrons.
The model should show 27 protons and 27 neutrons.
The model should show 32 protons and 59 neutrons.
The model should show 27 protons and 32 neutrons.
Why are sodium (Na) and potassium (K) in the same group on the periodic table?
1 point
They have similar atomic weights.
They are both hard and brittle.
They are both colorless.
They have similar reactivity.
They have similar reactivity.
A student cuts some fabric into two pieces. Is this change physical or chemical?
1 point
It is a chemical change because the size changes.
It is a physical change because the process is reversible.
It is a chemical change because there is no phase change.
It is a physical change because there is no reaction.
It is a physical change because there is no reaction.
Which procedure could be used to demonstrate that matter is conserved during a physical change?
1 point
Find the mass of a piece of ice. Let the ice melt. Find the mass of the liquid water.
Find the mass of a cup of water. Boil the water. Find the mass of the water that remains.
Find the mass of an apple. Cut the apple and remove the core. Find the mass of the remaining apple.
Find the mass of a raw egg. Cook the egg. Find the mass of the cooked egg.