Matter Review Georgia Standards

During an investigation, some students determine the physical properties of the two brass cubes shown.

Which physical property is different for each brass cube?

• Electrical Conductivity

• Melting Point

• Density

• Volume

Two objects have the same mass, but one object occupies a smaller volume than the other. Which statement about the objects must be true?

• The two objects have the same weights.

• The two objects have different densities.

• The two objects have different temperatures.

• The two objects are composed of the same substances

Mario performed an experiment to investigate how certain substances dissolve in water. He poured the substances in separate beakers of water and stirred each one using a glass rod. He then observed the results. What physical property of the substances did Mario investigate?

• Density

• Solubility

• Thermal Conductivity

• Melting Point

A student has two beakers, each containing 100 ml of water. He adds sodium chloride to the first beaker and stirs until no more will dissolve. He adds sodium nitrate to the second beaker and stirs until no more will dissolve. The amount of each substance that the student was able to dissolve is shown. Which statement about the experiment is the most accurate?

• Sodium chloride and sodium nitrate are both insoluble in water.

• Sodium chloride and sodium nitrate are equally soluble in water.

• Sodium chloride is more soluble in water than is sodium nitrate.

• Sodium nitrate is more soluble in water than is sodium chloride.

Tags

NGSS.MS-PS1-2

A student compares the mass and density of two objects. Object A and Object B both have the same mass. However, Object A has more density than Object B.

How can two objects with the same mass have a different density?

• The two objects have a different area.

• The two objects have a different shape.

• The two objects have a different weight.

• The two objects have a different volume.

For a laboratory exercise in class, a student is given a mixture of small pieces of iron, sand, water, and salt. What physical property could be used to best separate the iron from the other ingredients?

• Solubility

• Magnetism

• Melting Point

• Electrical Conductivity

A boy found a solid metal box in his backyard. The box had been buried for so long, it was difficult to determine from what the box was made. The boy measured the box and found its volume (v) to be 17.63 cubic centimeters (cm3) and its mass (m) to be 158 grams (g). The boy knows the formula for density (D) is D = mass divided by volume. This table shows the density of several metals.

DENSITY OF METALS

Metal Density

Copper 8.96 g/cm3

Gold19.32 g/cm3

Silver10.5 g/cm3

Tin7.28 g/cm3

Based on the measurements the boy collected, what metal is this box most likely made of?

• Copper

• Gold

• Silver

• Tin

Mass is the amount of matter an object is made of. Gravity is the universal force that acts between masses anywhere in the universe.

Which statement about gravitational force is true?

• The gravitational force between two objects depends on the shapes of the objects.

• The gravitational force between two objects depends on the masses of the objects.

• The gravitational force between two objects will decrease if the volume of either object is increased.

• The gravitational force between two objects will increase if the distance between the objects is increased.

Tags

NGSS.MS-PS2-4

Several groups of students were given a 2 gram (g) cube of iron and a 4g cube of iron. They examined three physical properties of each cube: density, magnetism, and electrical conductivity. Which statement describes the most likely findings of the students?

• The cubes had identical properties because the amount of matter would not change these physical properties.

• The 2g cube had smaller values for the physical properties because the matter was squeezed together in a smaller space.

• The density and ability to conduct electricity remained the same but was twice as magnetic because the cube was twice as large.

• The 4g cube had a greater density, was more magnetic, and was a stronger conductor of electricity because it occupied a larger space.

An object moves from one location to another location that has different gravity. Why does the object's mass stay constant, while its weight changes?

• Mass does not change because it is a constant force.

• Mass does not change because it is resistant to acceleration.

• Mass does not change because it adapts to the change in gravity.

• Mass does not change because the amount of matter stays the same.