Unit 2 Modeling Matter

Which of the following describes what is shown by the model?

• particles that make up a liquid

• particles that make up a specific color

• particles that make up heat

• microscopic pieces of ice inside a glass of water

Tags

NGSS.MS-PS1-1

A glass of sugar water is sitting on a table. Which of the following best describes the matter in this sugar water?

• It is made up of only one type of molecule.

• It is not made up of any molecules.

• It is made up of more than one type of molecule.

• It is not made up of matter.

Tags

NGSS.MS-PS1-1

A teacher wants to make a model to show her students that gas is a type of matter. Which of the following would best show this to the students?

• a beaker of sand absorbing water

• an ice cube melting

• a pot of liquid bubbling

• a balloon filled with air and then letting it out

A cook has containers with several yellow powders in them. She cannot tell the powders apart by looking at them. Which of the following would help her determine the properties of each powder?

• smell each of the powders

• taste each of the powders

• test if they dissolve in certain liquids

• All of the above.

Tags

NGSS.MS-PS1-2

The substances are small rocks, paper, feathers, and a small pencil.

Substance 1 - 7.5 grams

Substance 2 - 1 gram

Substance 3 - 2 grams

Substance 4 - 3.5 grams

Which substance could be the small rocks?

• Substance 1

• Substance 2

• Substance 3

• Substance 4

A hot-air balloon pilot controls the balloon by adding or releasing hot air as the balloon flies high in the sky.

Which of the following best describes why hot air is used to make the balloon rise?

• The hot air molecules stay still, which creates energy that helps the balloon to float.

• The hot air molecules disappear after they are created, causing the balloon to rise.

• The hot air molecules are heavy, which creates energy and causes the balloon to rise in the air.

• The hot air molecules move quickly, bouncing off each other and the walls of the balloon to create energy.

Tags

NGSS.MS-PS1-4

Yong pours 1 cup of liquid water into an ice tray and then puts it in the freezer to make ice. Which of the following statements about the liquid water and the ice is accurate?

• When the ice froze, it had the same amount of water as it did when it was a liquid.

• When the ice froze, it gained more water.

• When the ice froze, it had twice as much water as it did when it was a liquid.

• When the ice froze, it lost some water in the process.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS1-5

Gail adds sugar to a cup of warm water, the sugar dissolves. She wonders whether the sugar is still there since she cannot see it anymore. She thinks the sugar must still be there because the water tastes sweet.

Tim is not sure if the sugar is still there. The sugar taste is still there, but he believes the sugar may be gone since he cannot see it.

Which tests do you think will help them determine whether the sugar is still there? Circle all that apply.

• Mix the sugar with cold water and hot water.

• Add more sugar to the water, and observe what happens.

• Weigh the sugar and water separately before they are combined; after they have been combined, weigh the solution.

• Have more students taste the material, and collect their observations.

• Remove the water by letting the container sit until all of the water evaporates.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5