Midterm Review Unit 2 & Unit 3

Which of these is a physical change?

• Melting Ice
• Digesting Food
• Making Baking Soda Volcano
• Caramelizing Onions

Burning wood is a 

• Physical Change
• Chemical Change
• Both of these
• Neither of these

Which of these is NOT a pure substance?

• Carbon dioxide
• Mercury
• Air
• Diphosphorus pentoxide 

Which of these is a homogeneous mixture?

• Vegetable Soup
• Bubble Tea
• Sprite
• Fruit cocktail

What is the formula for density?

• D=V/M
• M=DxV
• V=M/D
• D=M/V

What volume would 425 grams of “gold” colored metal beads (known to have a density of 8.85 g/mL) occupy?

• 48.02 mL
• 0.021 mL
• 3761.25 mL

This subatomic particle is negatively charged and hangs out in orbits.

• Proton
• Neutron
• Electron
• Quark

This subatomic particle has no charge and is in the nucleus of an atom.

• Proton
• Neutron
• Electron
• Quark

This subatomic particle is always positive and is in the nucleus of an atom.

• Proton
• Neutron
• Electron
• Quark

Who is given credit for the plum pudding model?

• Thompson
• Rutherford
• Dalton
• Marsden