How much does a 125.0kg object weigh on Earth?

• 784.0 N
• 12.76 N
• 1113 N
• 1225 N

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

Brakes stop/slow a car, shoes/pad press against a disk/drum. What type of frictional force?

• Fluid
• Rolling
• Sliding
• Static

What phase change occurs during segment IV of the graph?

• solid to liquid
• solid to gas
• liquid to gas
• liquid to solid

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which element is represented by the diagram?

• Magnesium
• Sodium
• Titanium
• Vanadium

Tags

NGSS.MS-PS1-1

Which element could have the dot diagram shown?

• carbon
• helium
• magnesium
• potassium

Tags

NGSS.MS-PS1-1

How many valence electrons does a phosphorus atom contain?

• 5
• 7
• 9
• 15

Tags

NGSS.MS-PS1-1

What is the correct chemical formula for magnesium phosphate?

• Mg₃P
• MgPO₄
• Mg₃PO₄
• Mg₃(PO₄)₂

Tags

NGSS.MS-PS1-1

Which of the following is a synthesis reaction?

• 2H₂O --> 2H₂ + O₂
• Mg + 2HCl --> MgCl₂ + H₂
• 2Cu + O₂ --> 2CuO
• HCl + NaOH --> NaCl + H₂O

Which pH would indicate the most acidic substance?

• 2
• 4
• 10
• 14

Which of the following occurs as a pot of soup on a hot burner begins to boil?

• thermal energy is not transferred
• thermal energy is transferred from burner to air to soup
• thermal energy is transferred from burner to pot to soup
• thermal energy is transferred from soup to burner

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5