1st Nine Weeks Exam Review

The smallest particle of any particular type of matter is known by which of the following terms?

• Element

• Chemical

• Atom

• None of the above

Carbon is considered an element, while carbon dioxide is considered a compound. This is because carbon dioxide is –

• a gas at room temperature

• made of two different elements

• given off by green plants

• useful to human beings

Tags

NGSS.MS-PS1-1

Compounds are different than elements because compounds are–

• combinations of two or more elements

• not able to be broken down into parts.

• made from the same type of atoms

• a pure substance; elements are not

A student mixes two clear liquids together. After a few minutes, a white powder can be seen settling on the bottom of the test tube. Which of the following is a conclusion that the student can draw based on these observations? The two clear liquids –

• have combined to produce a new substance.

• were pure substances before they were mixed.

• are toxic and should be handled with extreme caution.

• have been stored too long and are no longer good.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the chemical symbol for magnesium?

• 12

• Mg

• Magnesium

• 24.31

Which of the following best describes luster?

• The mass of an object.

• The way light reflects off an object.

• The texture of an object.

• The density of an object

Tags

NGSS.MS-PS4-2

Scientists test for the hardness of a mineral by doing which of the following?

• Measuring the mass of the mineral and comparing it against other minerals.

• Observing how light reflects off the mineral and how the mineral looks as a result.

• Observing the color of a mineral and comparing it against other minerals.

• Scratching the mineral against other substances of known hardness.

All of the following are evidence of a chemical change EXCEPT –

• changes in state of matter

• formation of a gas

• color change

• precipitate forms

Tags

NGSS.MS-PS1-2

Which of the following is the correct calculation for determining the density of an object with a mass of 54 g and a volume of 6 mL?

• 6 ÷ 54

• 6 x 54

• 54 ÷ 6

• 6 + 54

Unlike nonmetals, most metals tend to —

• conduct electricity and heat well.

• be gases at room temperature

• break easily when hammered

• have less luster and shine