Topic 1 Introduction to Matter

Min is conducting an experiment where he compares the properties of water and lemonade. The first stage of the experiment is focusing only on the physical properties of the water and lemonade. Which property would Min not use?

• color

• flammabiltiy

• boiling point

Coffee is a ___________________.

• homogenous mixture

• heterogeneous mixture

Trail mix is a _________________.

• homogenous mixture

• heterogeneous mixture

Chicken broth is a _______________.

• homogenous mixture

• heterogeneous mixture

Spaghetti and meatballs is a ___________________.

• homogenous mixture

• heterogeneous mixture

Chocolate milk is a ______________.

• homogenous mixture

• heterogeneous mixture

George is writing a newspaper article about the fire at the local library. His introductory paragraph has an example of conservation of mass. "Our town library dealt with a terrible fire in one of its rooms over the weekend. The room contained much-loved books and magazines. Firefighters rushed to the scene, but were too late. All that remained of the books and magazines were ash, water vapor, and carbon dioxide fumes. The mayor arrived soon afterward and urged everyone to donate to help rebuild this important community building." Which sentence has an example of the law of conservation of mass?

• All that remained of the books and magazines were were ash, water vapor, and carbon dioxide fumes.

• Firefighters rushed to the scene, but were too late.

• The room contained much loved books and magazines.

Tags

NGSS.MS-PS1-5

Annie learns that the compound sulfuric acid is called the universal chemical. The acid is used in everything from gasoline to paper. Annie uses beads in three different colors to model sulfuric acid. Based on the model, what is the chemical formula of sulfuric acid? Hint: count the atoms

• S4O2H

• H2SO4

• S2HO4

Tags

NGSS.MS-PS1-1

Jonah and Rachel volunteer at the recycling center sorting and organizing recyclable objects. Jonah is sorting aluminum cans and crushing the cans to fit more in the bag. Rachel is sorting metal and steel objects into appropriate bins. Jonah realizes that even though he is crushing the cans, the amount of material in each can is unchanged. Which of the following describes the process that is taking place?

• a change in matter that produces one or more new substances

• a change in mass of an object

• a change in form or appearance of matter

Tags

NGSS.MS-PS1-5

Jonah and Rachel volunteer at the recycling center sorting and organizing recyclable objects. Jonah is sorting aluminum cans and crushing the cans to fit more in the bag. Rachel is sorting metal and steel objects into appropriate bins. Jonah realizes that even though he is crushing the cans, the amount of material in each can is unchanged. Rachel notices that many objects have rusted. Rusting is a chemical change that some metal and steel objects undergo when they are exposed to oxygen. Which option best describes a chemical change?

• a change in matter that produces one or more new substances

• a change from a liquid state to a gas state

• a change in form or appearance of matter

Tags

NGSS.MS-PS1-2