Unit Test — Unit test Answers

Three grams of the same substance in different phases are stored in three different containers. Each container is barely large enough to hold the substance.Which statement can be known about the behavior of the atoms in each container?

During which change of state do atoms lose energy?

Rahul sees a flock of birds. He watches as the flying birds land in neat little rows on several power lines. Which change of state does the motion of the birds most closely model?

Which procedure would best allow a scientist to observe a chemical property of hydrochloric acid (HCl) solution?

Which would show an example of how physical changes are reversible?

Sari is studying four different samples of materials. This table shows the mass and volume of the samples.

The density of solid aluminum is 2.70 g/cm3. If a 1g piece of aluminum is dropped in a cup of water, what will happen to the aluminum? (The density of water is 1.00 g/cm3.)

If two items are equal in size, the denser one will

Which is the amount of matter in an object?

The density of an object is .835 g/cm3. If its volume is 34 cm3, what is the mass of the object? (Density: D = )

Which is a characteristic of atoms?

Suppose that a substance in a beaker is heated over a burner in a science lab. Which observation would most likely indicate that a chemical change has occurred in the substance?

A column is filled with four different liquids of different densities. A red liquid, a blue liquid, a green liquid, and a purple liquid are all added into the column. This chart shows the densities of the liquids.In what order would the liquids arrange themselves, from top to bottom?

Abi measures the volume and weight of four objects and records his data in this table.Which object has the most mass?

Four students made statements about a tennis ball they were using in a lab.Which student made a mistake in her statement?

Which is the process by which a gas changes to a solid?

Which describes a feature of the physical changes of all substances?

A substance occupies one half of an open container. The atoms of the substance are closely packed but are still able to slide past each other.What is most likely the phase of the substance?

Venn diagrams are used for comparing and contrasting different topics. The overlapping sections show characteristics that the topics have in common, and the sections that are unique to each topic show the characteristics apply to only that topic.

Which is most likely a physical change?