Ch 6 Matter USA review

Compare the two balls shown in the photo. The beach ball at the left is filled with air. The bowling ball at the right is filled with a dense solid material. How is the beach ball different from the bowling ball?

• The beach ball has greater mass and less volume.

• The beach ball has less mass and larger volume.

• The beach ball has greater mass and a rougher texture.

• The beach ball has smaller volume and fewer colors.

An electromagnet is a powerful magnet that runs on electricity. The photo shows an electromagnet in use at a junkyard. Which statement does the photo show about the electromagnet?

• It can lift a variety of materials, including metal and plastic.

• It can lift many metals and leave plastics on the ground.

• It can lift any material if it is in small enough pieces.

• It can lift any material if it has enough electrical energy.

Tags

NGSS.MS-PS2-2

Sela’s mom gives her the keys shown in the photo. Sela wants to separate the keys according to which locks they open. Which two properties will determine which key opens which lock?

• color and size

• mass and weight

• size and shape

• mass and volume

Chelo and Dani are using the building toy shown here to make atomic models of matter. Each block will represent one atom. Why are the individual blocks a useful model of the atoms that make up matter?

• The blocks show the sizes of atoms.

• The blocks show the shapes of atoms.

• The blocks all have the same shape, size, mass, and other properties.

• The blocks can be joined together in a huge number of arrangements.

Tags

NGSS.MS-PS1-1

Yazmin is observing several changes to matter during a science investigation. Which observation is a chemical change that occurs only at some temperatures, not all temperatures?

• Water boils on a stove.

• Salt dissolves in a glass of water.

• Cookie dough bakes into a crispy cookie.

• Fruit juice freezes into an ice pop.

Which conclusion do the results of the experiment support?

• Sugar grains form a new substance when they dissolve in water.

• Sugar grains are the smallest pieces of sugar that will dissolve in water.

• Heat will increase the speed that sugar dissolves in water.

• Crushing a sugar cube will increase the speed that it dissolves in water.

Tags

NGSS.MS-PS3-5

Wrenna considered stirring the sugar and water as part of Step 2. Which is the best reason that stirring the mixture would NOT be useful for the investigation?

• Stirring could prevent a solution from forming

• Stirring could cause a chemical change to the sugar

• Stirring is a different variable that affects the speed of dissolving.

• Stirring would make it more difficult to complete Step 3.

Which property of the water did the sugar take on as the solution formed?

• mass

• taste

• color

• tempertature

Tags

NGSS.MS-PS1-2

Which of the following best explains why a model of a molecule might use different colored balls to represent different atoms?

• To demonstrate the different temperatures of atoms.

• To represent the different masses of atoms.

• To indicate the different types of atoms.

• To show the different sizes of atoms.

Tags

NGSS.MS-PS1-1

During an experiment, a student observes that a metal rod expands when heated. What type of change is this an example of?

• Physical change

• Energy change

• Chemical change

• Phase change

Tags

NGSS.MS-PS1-4