Matter Test PS 6.1.3

A model is shown. Which statement BEST describes the model?

• The model shows one atom made of two molecules.

• The model shows one molecule made of two atoms.

• The model shows one atom made of three molecules.

• The model shows one molecule made of three atoms.

Tags

NGSS.MS-PS1-1

Why do scientists use models to represent atoms?

• They are very complicated and impossible to understand otherwise.

• They are made of many molecules connected together.

• They are so small they cannot be seen, even with powerful microscopes.

• They are so large it is difficult to picture them.

Tags

NGSS.MS-PS1-1

Which chemical formula best represents this compound: It has 12 carbons, 22 hydrogen and 11 oxygen atoms.

• C₆H₁₂O₆

• 
  

  C12H22O11

  
  

• C12H19Cl3O8

• NH3

Tags

NGSS.MS-PS1-1

Which answer BEST describes the atomic makeup of H₂O?

• One hydrogen atom and one oxygen atom

• Two hydrogen atoms and two oxygen atoms

• Two hydrogen atoms and one oxygen atom

• One hydrogen atom and two oxygen atoms

Tags

NGSS.MS-PS1-1

Matter made up of only one type of atom is called a(n):

• Chemical equation

• Element

• Atom

• Particle

What is the process called when a gas cools and turns into a liquid?

• Condensation

• Evaporation

• Melting

• Vaporizing

Tags

NGSS.MS-PS1-4

Which of the following statements is true during this change of state?

• Mass increases

• Mass disappears

• Mass turns into energy

• Mass stays the same

Tags

NGSS.MS-PS1-4

NGSS.MS-PS1-5

Why does the lid shake and steam escape when the soup boils?

• Gas particles move faster than liquid particles. When boiling occurs, many fast-moving gas particles collide with the lid.

• Liquid particles move faster than gas particles. When boiling occurs, many fast-moving liquid particles collide with the lid.

Tags

NGSS.MS-PS1-4

What will MOST LIKELY happen to the soup when heat is removed?

• The temperature of the soup will go down.

• Energy will transfer from the soup to the surrounding air.

• The number of soup particles will increase.

• Soup molecules will collide more often.

• The average kinetic energy of soup particles will increase.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which BEST describes how the energy from the stove affected the pot of water?

• It increased the kinetic energy of the water, changing some liquid to gas.

• It decreased the kinetic energy of the water, changing some gas to liquid.

• It increased the kinetic energy of the water, changing some gas to liquid.

• It decreased the kinetic energy of the water, changing some liquid to gas.

Tags

NGSS.MS-PS1-4