Properties of Matter & Mixture Review

Students use a circuit to investigate the properties of six objects. The buzzer makes a sound if an object completes the circuit. The circuit and observations are shown. Which objects are electrical insulators?

• Eraser, toothpick, cotton ball

• Eraser, paper clip, safety pin

• Toothpick, paper clip, safety pin

• Paper clip, safety pin, aluminum foil

A student poured equal amounts of water and cooking oil into a jar. The student placed a lid on the jar and shook the mixture for five seconds and then let the jar sit for ten minutes. The results of this investigation are shown. Which conclusion best compares a property of cooking oil and water shown in this investigation?

• Cooking oil is less dense than water.

• Water is less dense than cooking oil.

• Water dissolves in cooking oil.

• Cooking oil dissolves in water.

A student compares the physical properties of the four objects shown. Which of these physical properties do all four objects have in common?

• They all have the same physical state and conduct electricity.

• They all conduct electricity and attract the same metal objects.

• They all attract the same metal objects and are not soluble in water.

• They all are not soluble in water and have the same physical state.

A teacher mixes a white powder into a beaker of water. The powder cannot be seen in the water. The teacher then heats the mixture until the water evaporates and the powder can be seen again. Which property of the powder is the teacher demonstrating?

• Solubility

• Density

• Conductivity

• Mass

A student classifies the objects shown based on their physical properties. Which property CANNOT be used to classify these objects into more than one group?

• Magnetism

• Solubility in water

• Mass

• Electrical conductivity

A science class tested three properties of different materials. The results are shown in the table below. Based on the table, which material would be best to use to insulate electrical wires?

• Wood

• Plastic

• Copper

• Steel

The table lists some properties of four different samples of matter. Which two samples could be glass and saltwater?

• Samples 1 and 2

• Samples 3 and 4

• Samples 1 and 3

• Samples 2 and 3

A mixture of beads was placed in a container, as shown below. The beads are of various sizes, and each one is made of plastic, glass, or steel. The mixture would be easy to separate because all the beads -

• are less dense than water

• are solids

• have the same mass

• are attracted to a magnet

The table lists the ingredients of five different mixtures. In which mixtures do all the ingredients maintain their physical state?

• Mixtures 3 and 4 only

• Mixtures 1, 3, and 4

• Mixtures 1, 2, and 5

• Mixtures 2 and 5 only

A student stirs 15 grams of each substance listed below into 200 milliliters of water to form four different mixtures. The student then tries to separate the water from each mixture by pouring the mixture through a kitchen tea strainer. Which mixture can the student separate most easily with the strainer?

• Salt and water

• Gravel and water

• Shampoo and water

• Sugar and water