Physical Science Midterm Review 1

If a small fire erupts at your lab bench, you should

• Scream "Fire!" and run out the door.

• Wait to see if the fire burns out on its own.

• Throw the nearest liquid on the fire.

• Notify your instructor and get the fire blanket to smother the fire.

Which one of the following is example of a pure substance?

• Water

• Salad Dressing

• Sweet Tea

• Plum Pudding

• Element
• Compound
• Homogeneous Mixture
• Heterogeneous Mixture

• All of the particles represent atoms
• All of the particles represent molecules
• Some particles are atoms and some are molecules
• There are no particles in the drawing

• Element
• Compound
• Homogeneous Mixture
• Heterogeneous Mixture

• Element
• Compound
• Homogeneous Mixture
• Heterogeneous Mixture

• All of the particles are atoms
• All of the particles are molecules
• Some particles are atoms and some are molecules
• There are no particles in this drawing

• Element
• Compound
• Homogeneous Mixture
• Heterogeneous Mixture

• Element
• Compound
• Homogeneous Mixture
• Heterogeneous Mixture

What two quantities are needed to calculate density?

• weight and mass
• mass and volume
• temperature and mass
• volume and temperature