Classification of Matter

Priya, Maya, and Benjamin are discussing the basic building blocks of matter. What do they agree is the fundamental unit of matter?

• Atoms

• Compounds

• Elements

• Mixtures

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-1

Hannah is conducting a chemistry experiment and needs to use a pure substance. Which of the following should she use?

• Saltwater

• Air

• Sugar

• Tossed salad

Tags

NGSS.MS-PS1-4

William and Arjun are discussing the simplest unit of an element. Ava joins the conversation and suggests that it is called:

• Molecule

• Atom

• Compound

• Particle

Evelyn, William, and Benjamin are studying for their chemistry exam. They are discussing the difference between a compound and an element. Can you help them understand the difference?

• Compounds, like the water Evelyn drinks, are made up of only one type of atom, while elements, like the oxygen William breathes, are made up of more than one type of atom

• Compounds, like the salt Benjamin uses in cooking, can be broken down into smaller pieces using physical change, while elements cannot

• Compounds, like the sugar Evelyn adds to her coffee, have the same properties throughout, while elements, like the gold in William's ring, have different properties

• Compounds, like the carbon dioxide Benjamin exhales, can only be separated by chemical changes, while elements, like the helium in William's party balloons, can be separated by physical changes

Benjamin, Grace, and Priya are conducting a science experiment in their school. They are asked to identify a homogeneous mixture from the given options. Which one should they choose?

• Saltwater

• Tossed salad

• Sand and water

• Brass

Samuel, Nora, and Michael are in a science class. They are discussing mixtures and their teacher asks them, 'What is the difference between a milkshake (a homogeneous mixture) and a bowl of cereal with milk (a heterogeneous mixture)?'

• Homogeneous mixtures like a milkshake have the same properties throughout, while heterogeneous mixtures like a bowl of cereal with milk have different properties

• Homogeneous mixtures like a milkshake can be separated by physical means, while heterogeneous mixtures like a bowl of cereal with milk cannot

• Homogeneous mixtures like a milkshake are made up of only one substance, while heterogeneous mixtures like a bowl of cereal with milk are made up of multiple substances

• Homogeneous mixtures like a milkshake are uniform, while heterogeneous mixtures like a bowl of cereal with milk are not

During a science experiment, Nora and Emma observed a physical change. Which of the following could be an example of the physical change they observed?

• Burning hydrogen gas

• Melting ice

• Reacting with an acid

• Oxidizing metal

During a science experiment, Zoe and Michael observed a reaction between an acid and a base. What type of change did they witness?

• Liquid freezing into a solid

• Breaking glass

• Filtering a solid from a liquid

• Reaction of an acid and a base

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Harper, Anika, and Kai are observing different processes in their science class. Which of the following processes observed by them is an example of a physical change?

• Burning wood

• Melting ice

• Cooking an egg

• Rusting iron

Benjamin and Charlotte are performing a chemistry experiment in which they mix two liquids. What is the term for the solid that forms as a result of this reaction?

• A gas formed from mixing two liquids

• A solid formed from mixing two liquids

• A liquid formed from mixing two solids

• A solid formed from boiling a liquid

Tags

NGSS.MS-PS1-2