EOC Science

How many of each atom are in the compound above?

• 1 magnesium atom, 2 iron atoms, and 4 oxygen atoms

• 3 magnesium atoms, 2 iron atoms, and 4 oxygen atoms

• 6 magnesium atoms, 6 iron atoms, and 12 oxygen atoms

• 3 magnesium atoms, 6 iron atoms, and 12 oxygen atoms

Tags

NGSS.MS-PS1-1

Potassium nitrate is a compound used in some fertilizers. Its chemical formula is KNO3. How many TOTAL atoms are in each unit of potassium nitrate?

• 2

• 5

• 3

• 9

Tags

NGSS.MS-PS1-1

Look at the pictures above. A shows the bag before the vinegar and baking soda are mixed together, and B shows it after they are mixed together. In which picture do the contents of the bag have the greater mass?

• The mass is greater in A—before they are mixed.

• The mass is greater in B—after they are mixed.

• The mass is the same in both.

• The mass depends on the temperature.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is the best clue that a chemical reaction has taken place?

• Change in color

• Change in state

• Change in particle size

• Change in volume

Tags

NGSS.MS-PS1-2

In this model, which particle determines the reactivity of this atom?

• Particle W

• Particle X

• Particle Y

• Particle Z

Tags

NGSS.MS-PS1-1

Which planet is the smallest?

• Mercury

• Venus

• Earth

• Mars

Tags

NGSS.MS-ESS1-3

What organelle do plants have surrounding their cells that animals lack?

• Cell Wall

• Woody Stems

• Cell Membrane

• Sharp Thorns

Tags

NGSS.MS-LS1-2

Newton's Third Law States:

• F=ma

• An object in motion will stay in motion and an object at rest will stay at rest unless acted on by an unbalanced force.

• A regularly occurring or apparently inevitable phenomenon observable in human society.

• For every action, there is an equal and opposite reaction.

Tags

NGSS.MS-PS2-1

Jack has a rock. The rock has a mass of 14g and a volume of 2cm³. What is the density of the rock?

• 7 mL

• 7 g/cm³

• 28 g/cm³

• 1/7 g/cm³

Which object below has the most inertia when at rest?

• A pencil

• A golf ball

• A 10 pound weight

• A school bus