Physical Science Midterm Review

George is writing a newspaper article about the fire at the local library. His introductory paragraph has an example of conservation of mass. Choose the sentence that illustrates conservation of mass.

• Our town library dealt with a terrible fire in one of its rooms over the weekend.

• The room contained much-loved books and magazines.

• Firefighters rushed to the scene, but were too late.

• All that remained of the books and magazines were ash, water vapor, and carbon dioxide fumes.

• The mayor arrived soon afterward and urged everyone to donate to help rebuild this important community building.

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Min is conducting an experiment where he compares the properties of water and lemonade. The first stage of the experiment is focusing only on the physical properties of the water and lemonade. Which comparison point would Min not use in the first stage?

• color

• conductivity

• flammability

• boiling point

Identify air as a pure substance or mixture.

• pure substance

• mixture

Identify smog as a pure substance or mixture.

• pure substance

• mixture

Identify oxygen as a pure substance or mixture.

• pure substance

• mixture

Identify sugar as a pure substance or mixture.

• pure substance

• mixture

Identify coffee as a pure substance or mixture.

• pure substance

• mixture

Identify chocolate milk as a pure substance or mixture.

• pure substance

• mixture

Nico is sorting foods in his refrigerator for a class project. He is not certain how to classify strawberry jam. A spoonful of jam has a definite shape and volume, but only if he does not tip the spoon. Which classification best describes the jam?

• amorphous solid

• crystalline solid

• liquid with high viscosity

• liquid with low viscosity

A scout on a hike becomes lost. He does not have a compass, but he does have a small needle, a magnet, and some water. He magnetizes the needle and then gently places it on the surface of the water, where it points to the north. What property of the water makes it possible for the needle to lie on the surface of the water?

• viscosity

• definite volume

• surface tension

• boiling point