Unit 2- Matter & Measurement 8th Grade Review -2024

Jason wanted to explain the difference between mass and weight to his classmates. Which is a correct statement that Jason could include in his explanation?

• Weight is a measure of the amount of matter in an object.

• Mass is the measure of the gravitational force on an object.

• Mass varies depending on the location of the object.

• Weight varies depending on where the object is in the Solar System.

Suppose you have two pieces of modeling clay. One piece contains more clay than the other. How do the two pieces of clay differ?

• The larger piece of clay has a greater mass and a greater weight.

• The larger piece of clay has a greater mass but the same weight.

• The larger piece of clay has a smaller mass but the same weight.

• The larger piece of clay has a smaller mass and a greater density.

Which of the following actions described below will change an object's weight, but not its mass?

• Breaking the object

• Compressing the object

• Putting the object in a box

• Placing the object on a different planet

Which of these statements is true about the weight of objects?

• Objects on the same planet all have the same weight.

• Weight depends on mass and where the object is.

• Only objects on the surface of a planet have weight.

• All objects have weight, regardless of where they are in the universe.

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Physical properties can be used to compare and classify substances. Which statement is correct about a physical property?

• A physical property is based on a substance’s ability to change into a new substance.

• A physical property is difficult to observe and even more difficult to measure.

• A physical property describes a substance’s ability to be involved in a chemical reaction.

• A physical property can be observed or measured without changing the identity of the substance.

Thomas performed an experiment to measure the temperature of water as he heated it on a hotplate. At the end of his experiment, he plotted the results as shown in the graph . Which of the following physical properties of water did Thomas measure?

• volume and thermal conductivity

• solubility and electrical conductivity

• melting point and boiling point

• densities and physical states of matter

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS3-4

This physical property is one that remains the same regardless of the amount of matter that is present. Which of the following physical properties of matter is described above?

• mass

• density

• volume

• weight

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

• melting point

• solubility

• thermal conductivity

Physical properties can be used to classify and compare substances. The illustration below shows a physical property that is being investigated using different materials. What physical property is most likely being investigated in this illustration?

• thermal conductivity

• melting point

• magnetism

• electrical conductivity

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?

• magnetism

• solubility

• melting point

• electrical conductivity