Unit 5 Chapter 1

Density: Chemical or Physical Property

• Chemical Property
• Physical Property

Flammability (burns): Chemical or Physical Property

• Chemical Property
• Physical Property

Reacts with Acid: Chemical or Physical Property

• Chemical Property
• Physical Property

Tags

NGSS.MS-PS1-2

Melting Point: Chemical or Physical Property

• Chemical Property
• Physical Property

Tags

NGSS.MS-PS1-4

When a scientist mixed two chemicals, an exothermic reaction takes place. Which of the following would be proof that the reaction was exothermic?

• a change of color
• a change of state
• a temperature decrease
• a temperature increase

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Which of the following is a chemical interaction?

• water freezes to form ice

• sugar dissolves in water

• gasoline burns in a car engine

• a piece of metal expands when it is heated

One of the signs of a chemical reaction taking place is:

• Bubbles are produced 
• Reactants are not combining
• Products are not forming
• Color is not changing

Tags

NGSS.MS-PS1-2

Which is NOT an indication of a chemical change?

• temperature change
• formation of a precipitate
• shape change
• production of light

Tags

NGSS.MS-PS1-2

Which of the following is an example that includes evidence of a chemical reaction?

• A sample of zinc is placed in water and it settles to the bottom
• A solid block of ice is heated and it completely melts into a liquid. 
• Sugar that is burned gives off an odor and turns brown and then black.
• A tomato is placed into a blender and chopped up into smaller pieces.

Tags

NGSS.MS-PS1-2

If an acid is combined with a base of equal strength, the result will most likely be

• a neutral solution.
• a stronger acid.
• impossible to tell without testing the pH.
• a stronger base

Tags

NGSS.MS-PS1-2