EOG Review

A bar of gold is made of only one ______

• Plasma 

• Mixture 

• Element 

• Compound

Has properties different than the elements that make it up 

• Compound 

• Mixture 

How many MOLECULES are in the following compound:  CaCO₃

• 1

• 3

• 5

• 0

Tags

NGSS.MS-PS1-1

What does Dissolved Oxygen mean?

• How much acid is in the water

• How cold the water is

• DO

• How much oxygen is in the water

Factors that affect dissolved oxygen include

• temperature and stream flow.

• lack of fish and amphibians.

• the amount of carbon dioxide.

• Non of the above.

Which of the following is NOT a mixture? 

• NaCl + H₂O

• C₆H₁₂O₆ + H₂O

• C₆H₁₂O₆

• SiO₂ +H₂O

Which examples represent parasitic relationships?

• 1 and 3

• 1 and 4

• 2 and 3

• 2 and 4

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-4

A teacher asks her students to classify the substances listed in the table shown as elements, compounds, or mixtures. A student claims that all of the substances are compounds. Which statement correctly describes the student’s claim?

• The student’s claim is correct because a substance that contains more than two of the same atom is a compound.

• The student’s claim is incorrect because a substance that contains more than one element is always a mixture.

• The student’s claim is incorrect because the atoms in the substances are physically combined to form a mixture.

• The student’s claim is correct because the atoms in the substances are chemically combined to form a compound.

Tags

NGSS.MS-PS1-1

A student places a piece of magnesium metal in a test tube containing acid. The student records four observations during the experiment. Which observation describes a chemical change?

• A.

• B.

• C.

• D.

Tags

NGSS.MS-PS1-2

What makes 97% of the water on Earth unfit for drinking?

• It is highly saline.

• It is frozen.

• It has a low density.

• It has a high specific heat.