Review

Emily conducts an experiment to compare the densities of cork and iron with water. She places a piece of cork and a small iron nail in a beaker filled with 100 mL of water, and she records her observations. 1. The piece of cork floats on water. 2. The iron nail sinks to the bottom of the beaker. What can Emily conclude from her experiment?

• Both the cork and the iron nail are more dense than water

• Both the cork and the iron nail are less dense than water

• The cork is more dense than water, and the iron nail is less dense than water

• The iron nail is more dense than water, and the cork is less dense than water

A student creates a model of an atom. The student makes a mistake. How should the student correct the mistake, and why?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-1

A researcher works to separate substances X and Y into smaller parts using chemical processes, as shown. Which substance represents a molecule?

• Y is a molecule because it cannot be separated into smaller parts

• X is a molecule because it cannot be separated into smaller parts

• Y is a molecule because it can be separated into smaller parts

• X is a molecule because it can be separated into smaller parts

Tags

NGSS.MS-PS1-1

The properties of substance X are shown in the table. How is substance X best classified?

• Substance X is a solid because it is clear and has a definite volume

• Substance X is a gas because it has an indefinite shape and has a definite volume

• Substance X is a solid because it is clear, and the particles are close to each other

• Substance X is a liquid because it has a definite volume, and the particles slide past each other

Tags

NGSS.MS-PS1-4

Peter wants to know the volume of object A. He fills a graduated cylinder with 10 mL of water and then places object A inside the graduated cylinder. He draws a before and after diagram in his science notebook. What is the volume of object A?

• 20 mL

• 15 mL

• 10 mL

• 5 mL

Tags

NGSS.MS-PS1-2

Sugar will dissolve in water, but flour will not. Which property of these two substances explains the difference in dissolving in water?

• mass

• color

• density

• solubility

Which property is best observed by using the sense of touch to describe it?

• color

• odor

• shape

• texture

Tags

NGSS.2-PS1-1

The table lists the properties of a substance. How is the substance classified?

• It is a liquid because the volume is fixed, and the shape changes

• It is a liquid because it retains mass and volume

• It is a solid because it retains mass and volume

• It is a solid because the length cannot be measured, and the shape changes

A student places four same-sized blocks (P,Q,R,S) made of different materials in a beaker with water. The student observes what happens to each block and makes a list of conclusions. Which conclusions are correct?

• 1 and 2

• 1 and 3

• 2 and 4

• 2 and 3

Tags

NGSS.MS-PS1-2

Which is a chemical change?

• frying an egg

• boiling water

• breaking a glass cup

• crushing a piece of bread

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5