8.6 Summative test review

Marla and Jon are modeling mixtures. Classify "Concrete" as a model of a homogeneous mixture or a heterogeneous mixture.

• Homogeneous Mixture

• Heterogeneous Mixture

Marla and Jon are modeling mixtures. Classify "Steel alloy paperclip" as a model of a homogeneous mixture or a heterogeneous mixture.

• Homogeneous Mixture

• Heterogeneous Mixture

Marla and Jon are modeling mixtures. Classify "Italian salad dressing" as a model of a homogeneous mixture or a heterogeneous mixture.

• Homogeneous Mixture

• Heterogeneous Mixture

Marla and Jon are modeling mixtures. Classify "Water with sand in it" as a model of a homogeneous mixture or a heterogeneous mixture.

• Homogeneous Mixture

• Heterogeneous Mixture

The atomic number of an element is determined by which of the following?

• Number of electrons

• Number of neutrons

• Number of protons

• Number of protons and neutrons

Which statement BEST describes the term surface tension?

• the ability of water molecules to bond with other molecules

• the property of the surface of a liquid that allows it to resist an external force

• the ability of water molecules to attract each other and other polar molecules

• a property of water in which water molecules bond with other water molecules

What is the pH measurement of a base?

• Less than 7

• Exactly 7

• Greater than 7

• Equal to 7

Which of the following is NOT a characteristic of an acid?

• Has a sour taste

• Feels soapy to the touch

• Has a pH measurement of 2.5

• Causes litmus paper to turn red

What is the effect of a base on litmus paper?

• Turns it red

• Turns it blue

• No change

• Turns it green

Which characteristic is common to both acids and bases?

• Sour taste

• Soapy feel

• Changes litmus paper color

• pH of 7