First Phy.Sci Exam (Matter, Properties, Atoms)

Which is the best way to determine if an object is made of pure silver?

• Determine the solubility of the object

• Test to see if the object is chemically reactive

• Determine the density of the object and compare the known density of pure silver

• Compare the mass of the silver object to the mass of a piece of pure silver.

Fresh milk has several parts that a farmer can separate and sell. A farmer removes the top layer of fat from fresh milk. Why is the layer of fat on top?

• The fat does not mix well with the other parts of the milk.

• The fat has a lower density than the other parts of the milk

• There is less fat compared to other parts of the milk

• There are other parts of the milk come out of the cow before the fat

The diagram below shows 20 grams of two different materials, A and B, on a laboratory balance. Compared to material A, material B has a different _____________

• Density

• Mass

• Phase

• Shape

A student is given two different objects, a marble and a cube, that appear to be made of the same substance. The student did some measurement of the objects and recorded the measurements in the table. Using the student's measurements, what is the best determination that can be made about the objects. The formula for density if D = M / V.

• The objects are different substances because their masses are different.

• The objects are different substances because their densities are different.

• The objects are different substances because their volumes are different.

• The objects are the same substance because they have the same density.

Which statement about mass and weight is correct?

• Mass is the scientific term for weight

• Weight directly measures force while mass directly measures amount of matter

• Weight has units of kilograms or grams. Mass has units of Newtons.

• The mass of an object depends on the size of the object. The weight of an object does not depend on the size of the object.

If you were to take a radio to the moon, which of the following would correctly describe its changes to its mass and weight?

• Its mass and weight would not change

• Its mass would increase, and its weight would remain the same

• Its weight would increase, and its mass would remain the same

• Its weight would decrease, and its mass would remain the same

Which of the following is most likely to change scientific knowledge?

• More expensive experiments

• More links added to the internet

• Improved methods to conducting opinion polls

• New data or interpretations of the natural world

Which of the pictures demonstrates a state of matter withOUT a fixed shape or fixed volume?

• J (1)

• K (2)

• L (3)

• M (4)

In which state of matter are the molecules spaced farthest apart?

• Solid

• Liquid

• Gas

• All are equal

Which of the pictures demonstrates a state of matter with a fixed shape and a fixed volume?

• J (1)

• K (2)

• L (3)

• M (4)