WorksheetsMatter Review: (1a/b)
Total questions: 15
Worksheet time: 34mins
What is one difference between mixtures and pure substances?
Mixtures can be physically separated.
Pure substances can be physically separated.
Mixtures are made of one type of atom.
Pure substances have no chemical bonds.
Which of these is not considered a pure substance?
atom
mixture
element
compound
Water is made up of different elements, hydrogen and oxygen. Is water considered a mixture or a pure substance?
(Select the BEST answer.)
Since water is composed of two separate elements, it is a mixture.
Water can be heated easily so it can turn to steam; therefore, it is a mixture.
Water is composed of elements; therefore, it is a pure substance.
Since all water molecules have a consistent ratio of hydrogen to oxygen, it is considered a pure substance.
What happens if heat is released from water?
a phase change occurs -
solid to gas
a phase change occurs -
liquid to solid
a phase change occurs -
solid to liquid
a phase change occurs -
gas to solid
Elements are pure substances that make up all matter. Silver, iron, gold, and aluminum are some examples of these pure substances. What is the basic building block of all pure substances that make up matter in the world?
molecules
atoms
metals
cells
What must be added to water in order to change state from liquid to a gas?
more atoms of water
more hydrogen atoms
more oxygen atoms
more energy or heat
Which statement is false?
When a substance changes its state, the kinetic energy changes.
When a substance changes its state, mass remains constant.
When a substance changes its state, something chemically new is formed.
When a substance changes its state, only the form changes.
Identify the compound.
N2
H2O
Cl
Na
A model of gas particles is shown.
How should the model be changed to show the particles of a liquid?
Decrease the particles' velocity and space between the particles.
Increase particles' velocity and space between the particles.
Increase the particles' velocity and decrease the space between the particles.
Decrease the particles' velocity and increase the space between the particles.
Identify the substance that has the lowest average molecular kinetic energy.
Water at -10ºC
Water at 0ºC
Water at 50ºC
Water at 75ºC
The composition of the atmosphere is shown in the pie-chart. Which statement BEST describes the chart?
The chart shows the percentages of compounds in a pure substance.
The chart shows the percentages of elements in a mixture.
The chart shows the percentages of elements in a compound.
.
The chart shows the percentages of pure substances in a mixture.
Which statement best explain why matter is said to move even as in a solid state.
The particles have small vibrational movements, but are not able to move out of their positions relative to one another.
The particles possess enough energy to become an ionized gas, which is the most common state of matter in the universe.
Even though the particles are bound by intermolecular forces, they are able to move past each other.
The particles are not bound to one another, move quickly, have a low density, and are able to spread apart from one another if in an open container.
What do water (H2O) and rust (Fe2O3) have in common?
They are both elements.
They are both heterogeneous mixtures.
They are both homogeneous mixtures.
They are both compounds.
Which of the following statements is the MOST accurate about the heating curve and energy?
The temperature may increase; however, there is no information about a energy change.
As the amount of time increases, the substance turns into plasma and has the highest kinetic energy.
Moving from a solid to a gas the temperature and the kinetic energy increases.
Moving from a gas to a solid the temperature decreases but the kinetic energy increases.
Consider the cooling curve of water. As the temperature changes
molecular attraction and kinetic energy decrease.
kinetic energy decreases and the molecules get closer together.
kinetic energy increases and potential energy decreases.
the molecules get closer together and there is no real change in molecular energy.
