Modeling Matter

If a substance can dissolve in water or it's molecules are attracted to water, we call this ____________.

• Attracted

• Dissolved

• Soluble

• Insoluble

Which of the following can happen when you mix a liquid with a solid?

• A

• A, C

• A, B, C

• C

Tags

NGSS.MS-PS1-2

Think back to our solubility experiment. The cumin and pepper solid molecules were not attracted to the liquid molecules. Which of the following behaviors did the cumin or pepper molecules demonstrate?

• The solid molecules separated.

• The solid molecules dissolved.

• The solid molecules were clustered together.

• The solid molecules were soluble.

Think back to our solubility experiment. Which of the following solid ingredients were not soluble.

• A. Sugar

• B. Citric Acid

• C. Cumin

• D. Pepper

Students are asked to create models of molecules using marbles of different colors to represent atoms of different types. Look at the table describing the models made by four students. Which of the following is the most accurate evaluation of these models?

• Only Students 1, 2, and 4 created acceptable models, since molecules must be made of different types of atoms.
  

   

• All student models are acceptable except that of Student 4, since molecules can't be made of so high a number of atoms.

• ​​​​​​​Only Student 2 created an acceptable model of a molecule, since every molecule must have a balance of atoms.
  

   

• ​​​​​​​All of the students created acceptable models because molecules can consist of many different configurations of atoms.
  

   

Tags

NGSS.MS-PS1-1

Which of the following best describes the particles in a solid?

• Tightly packed and vibrating in place

• Moving freely and quickly

• Spread out and moving at moderate speeds

• Nonexistent

Tags

NGSS.MS-PS3-4

What happens to the particles of a substance as it changes from solid to liquid?

• They become more tightly packed and stationary

• They remain tightly packed but begin to move freely

• They begin to move more freely and are less tightly packed

• They spread out significantly and move at high speeds

Tags

NGSS.MS-PS1-4

A ​ (a)   is built to explain how something works

• atom

• compound

• model

• molecule

• natural element

• states of matter

Tags

NGSS.MS-PS1-1

NGSS.MS-LS1-2

This illustration is a/an _____________

• compound

• element

• mixture of elements

• mixture of elements and compounds

Tags

NGSS.MS-PS1-1

A physical representation or visual for explaining & analyzing

• Particle

• Matter

• Dissolve

• Model

Tags

NGSS.MS-PS1-1

NGSS.MS-LS2-3