7th grade ATLAS science review- PS and ETS

All matter is made of 

• energy 
• atoms 
• electrons 
• compounds 

Tags

NGSS.MS-PS1-1

Two or more atoms chemically bonded together are called a

• atom
• element
• molecule
• mixture

Tags

NGSS.MS-PS1-1

How many carbon atoms are there in a methane molecule? 

• 0
• 1
• 4
• 5

Tags

NGSS.MS-PS1-1

Choose all the physical changes.

• Liquid water becomes water vapor.

• Combining sulfuric acid and sodium chloride gives off hydrogen chloride gas.

• Sodium chloride (NaCl) dissolves in water.

• Burning a scented candle.

• Dry ice (solid CO2) sublimates to CO2 gas.

Tags

NGSS.MS-PS1-4

Choose all the chemical changes.

• Liquid water becomes water vapor.

• Combining sulfuric acid and sodium chloride gives off hydrogen chloride gas.

• Sodium chloride (NaCl) dissolves in water.

• Burning a scented candle.

• Dry ice (solid CO2) sublimates to CO2 gas.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is a common sign that a chemical change has occurred?

• A chemical has turned a different color

• A chemical has changed to a different state of matter

• A chemical has changed size

• A chemical has become a different shape

Tags

NGSS.MS-PS1-2

What is a shorthand notation that represents a compound or molecule called?

• Chemical Equation
• Chemical Formula
• Chemical Reaction
• Chemical

How many oxygen atoms are in this chemical formula?

• 7 oxygen atoms
• 4 oxygen atoms
• 3 oxygen atoms
• 1 oxygen atoms

Tags

NGSS.MS-PS1-1

There are two reactants in a chemical equation, and one product.  The mass of the product is 30g.  The mass of the first reactant is 17g.  What must the mass of the second reactant be, if the equation is to follow the law of conservation of mass?

• 47g
• 13g
• 23g 
• You cant tell with the given information

Tags

NGSS.MS-PS1-5

Which section represents the reactants?

• A

• B

• C

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5