Unit 1 TEST Review!

If a 5th substance was added and had a density of 0.95 g/cm³, where would it rest in the jar?

• Between A and B

• Above A

• Between B and C

• Between C and D

Answer explanation

If the 5th substance has a greater density than another substance, it will sink below it. If its density is less than another substance's, then it will float. You have to see what two numbers it would fit in between!

Tags

NGSS.MS-PS1-2

Is this a chemical or physical change?

• Physical change, bonds were not broken, and no new bonds were created. Therefore, no new substance was created.

• Chemical change, bonds were broken, and new bonds were created. Therefore, a new substance was created.

• Physical change, bonds were broken, and new bonds were created. Therefore, a new substance was created.

• Chemical change, bonds were not broken, and no new bonds were created. Therefore, no new substance was created.

Answer explanation

Are the atoms arranged the same way before and after the reaction? If they are not the same, a chemical reaction occured!

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What happened to the mass of these substances before and after a reaction?

• The mass of the substances increased

• The mass of the substances decreased

• The mass stayed the same

• There is not enough information to determine the affect of the mass

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Is this a chemical or physical change?

• Chemical, bonds were broken and new bonds were created.

• Chemical, bonds were not broken and new bonds were not created.

• Physical, bonds were broken and new bonds were created.

• Physical, bonds were not broken and new bonds were not created.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which two physical properties are the most helpful to use when identifying a mineral?

• Streak and surface color

• Hardness and streak

• Size and color

• Texture and color

Answer explanation

Streak and hardness are specific to minerals and many do not share these same characteristics. For instance, a diamond leaves no streak and is the hardest mineral. With these two properties, you would be able to identify it!

What physical property test is being observed in the image?

• Streak

• Hardness

• Texture

• Surface color

What physical property test is being observed in the image?

• Streak

• Surface color

• Reaction to acid

• Hardness

All three cubes have the same mass. Which of the following statements is true?

• Cube C has larger atoms

• Cube A has a larger volume than Cube C.

• Cube B is more dense than Cube C.

• Cubes A, B, and C are all made of the same material.

All three cubes are made entirely of the same material. Which of the following statements is true?

• All three cubes have the same volume

• Cube A has the smallest atoms

• Cube C has the greatest density

• All three cubes have the same density

Answer explanation

If they are made ENTIRELY of the SAME MATERIAL, that means they are completely packed with the matter. When solving for density, they will all have the same density since the mass and volume increased equally.

Which of the following separation techniques would separate a beaker with dissolved salt water and insoluble soil?

• Extraction only

• Extraction and filtration

• Extraction and distillation

• Filtration only

Answer explanation

There is dissolved salt so your answer MUST include distillation to separate the salt from water!