Common Assessment 2 at home Review

A change in which NEW substances are formed.

• Chemical change
• Physical change
• Casual change
• Formal change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

An exothermic reaction is a reaction where energy is

• released to the surroundings as heat, and temperature increases.

• is absorbed from the surroundings, and temeprature drops.

• where energy is destroyed

• where energy is created

Tags

NGSS.MS-PS1-4

Which of the following Is a physical change?

• Getting a haircut

• Rusty metal

• sour milk

• burning paper

A change in the size, shape, or state of matter.

• chemical change
• physical change
• chemical reaction
• electron change

Tags

NGSS.MS-PS1-4

If there are 4 atoms of nitrogen in the reactants, how many atoms of nitrogen will there be in the products?

• 0

• 2

• 4

• 8

Tags

NGSS.MS-PS1-5

Fill in the blank:
The law of conservation of mass states that matter cannot be created nor __________________.

• destroyed
• rearranged
• transferred
• changed

Tags

NGSS.MS-PS1-5

In a chemical reaction, the mass of the reactants was 15g.  According to the Law of Conservation of Mass what is the mass of the products?

• half of the mass of the reactants 
• 15g
• You can't tell with the given information 
• double the mass of the reactants

Tags

NGSS.MS-PS1-5

How does the mass of the reactants in the equation compare to the mass of the products?

• It's twice as much.

• It's greater.

• It's the same.

• It's smaller.

Tags

NGSS.MS-PS1-5

A chemical reaction that absorbs energy is called an

• endothermic reaction

• exothermic reaction

Tags

NGSS.HS-PS1-4

When two substances were mixed they produced bubbles, changed color and produced an odor. This was most likely a

• physical change

• chemical change

Tags

NGSS.MS-PS1-2