Physical Science Review

Which liquid is the most dense?

• lamp oil

• milk

• soda cap

• corn syrup

Tags

NGSS.MS-PS1-2

Based on this table it can be concluded that

• Sodium is the most reactive
• strontium is the best conductor
• phosphorous is the least stable
• aluminum has the most protons

Which pair of elements have the same number of valence electrons?

• Lithium and Beryllium
• Magnesium and Sodium
• Lithium and Sodium
• Magnesium and Lithium

An experiment is performed in which a crystalline substance is added to a beaker filled with room temperature water. The following observations are made:
I. The crystals dissolve
II. A precipitate is formed.
III. The bottom of the beaker feels warm to the touch.
IV. Bubbles begin forming within the water.
All of the observations are evidence of a chemical change EXCEPT –

• observation I.
• observation II.
• observation III.
• observation IV.

How many total atoms in 4NaHCO₃ ?

• 24
• 4
• 16
• 15

Tags

NGSS.MS-PS1-1

(1802) What is the atomic number of this atom?

• 2

• 4

• 6

• 8

(1803) What element is represented in this Bohr Model?

• Lithium

• Boron

• Carbon

• Neon

How do scientists know how atoms are structured?

• By looking at them under a microscope

• By running experiments that expose their properties

• By examining only the largest atoms

• By splitting them apart

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

What is the mass number of this atom?

• 9
• 10
• 19
• 27

Tags

NGSS.MS-PS1-1

In a tug of war game, the NET FORCE is 50N to the LEFT. The winning team pulled with a force of 200N to the left. How much force did the losing team pull with?

• 150N right

• 250N right

• 100N right

• 50N right

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2