Chapters 1 and 2 Test-6th grade

The model in the image shows three substances. Which statement correctly identifies the state of matter for each substance?

• Substance A is a liquid, Substance B is a gas, and Substance C is a solid.
• Substance A is a gas, Substance B is a liquid, and Substance C is a solid.
• Substance A is a gas, Substance B is a solid, and Substance C is a liquid.
• Substance A is a liquid, Substance B is a solid, and Substance C is a gas.

Because of its physical properties, lithium is commonly used in the batteries for our laptops, cellular phones, and electric vehicles. Lithium is a soft, silvery-white material that is good at conducting electricity. As the third element on the periodic table, it is very light and has a low density. Which statement correctly classifies lithium?

• Lithium is a nonmetal.
• Lithium is a metalloid.
• Lithium is a rare earth element.
• Lithium is a metal.

Boron has similar properties to metals. For example, it is a solid at room temperature, and it has a metallic luster. Which of the following investigative questions would help determine if it should be classified as a metal or metalloid?

• How well does boron conduct electricity?
• Is boron magnetic?
• Whit is the density of boron?
• What color is boron when it is heated?

The diagram shows the method used by a student to find the density of olive oil. The student placed an empty graduated cylinder on a balance and recorded the mass. Then they added the olive oil to the graduated cylinder. What is the density of the olive oil? Remember that d=m/v

Which statement correctly compares solids, liquids, and gases by ranking the kinetic energy of the atoms and molecules in order from least to greatest?

• solid, liquid, gas
• gas, liquid, solid
• solid, gas, liquid
• liquid, solid, gas

Which observation provides evidence that a new substance formed during a chemical change?

• The color of a liquid changes from dark blue to light blue when water is added.
• Bubbles and an odor are produced when a colorless liquid is poured onto a gray solid.
• A brown powder is produced when large brown rocks are broken into pieces with a hammer.
• Ice cubes form when a tray of water is placed in the freezer.

Natural gas is an energy resource that is difficult to transport from one location to another. However, it can be transported if it is turned into a liquid. Which of the following proposes a solution to make natural gas into a liquid?

• Design a process that slows down the molecules of gas and moves them farther apart.
• Design a process that speeds up the molecules of gas and moves them farther apart.
• Design a process that slows down the molecules of gas and moves them closer together.
• Design a process that speeds up the molecules of gas and moves them closer together.

During an experiment, a non-metallic solid is dissolved in a liquid. Observations of the resulting mixture were made. No gas formation occurred. Which piece of laboratory equipment could be used to determine if a ne substance formed during the experiment?

• a balance to measure if the mass changed once the solid dissolved
• a beaker to measure if the volume changed once the solid dissolved
• a magnet to measure if the resulting mixture has magnetic properties
• a thermometer to measure if the temperature changed once the two liquids are mixed