Chemical Reactions & Conservation of Mass

Select any answer(s) that would be considered adhesion?

• Water droplets run down a driveway and make a large puddle at the bottom.

• Your umbrella still has water droplets on it when you get inside.

• The surface tension of the lake allows the frog to land on a lily pad.

• The flower absorbs water that is sticking to the roots.

Which substance(s) would be classified as a base?

• mystery liquid with a pH of 9.8

• mystery liquid with a pH of 6.2

• mystery liquid with a pH of 12.1

• mystery liquid with a pH of 1

• mystery liquid with a pH of 7.4

You come across a random liquid that isn't labeled. You use indicator paper to test for the pH and the strip comes back yellow. Which statement(s) would be true about the liquid?

• It would be an acid.

• It would be a base.

• The pH could be raised by adding a strong acid.

• The pH could be lowered by adding pure water.

• The pH could be raised with by adding a weak base.

Tags

NGSS.MS-PS1-2

Which of the following correctly labels the four diagrams?

• A - compound

  B - heterogeneous mix

  C - element

  D - homogeneous mix

• A - compound

  B - homogeneous mix

  C - element

  D - heterogeneous mix

• A - homogeneous mix

  B - compound

  C - element

  D - heterogeneous mix

• A - homogeneous mix

  B - element

  C - compound

  D - heterogeneous mix

Tags

NGSS.MS-PS1-1

Which element(s) are NOT present in the chemical reaction?

(Use a periodic table)

• potassium

• carbon

• sodium

• phosphorus

• chlorine

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which model(s) below does not contain a compound?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-1

Select all TRUE statements about the properties of water.

• Adhesion causes water to stick to other objects aiding in capillary action.

• Cohesion causes water to attract to itself aiding in surface tension.

• Cohesion causes water to stick to itself aiding in capillary action.

• Adhesion causes water to stick to itself aiding in surface tension.

• Surface tension causes the water surface to attach to air molecules strengthening the surface.

This is a picture of Trail Mix. Looking at it as a scientist, trail mix could represent a model of which of these?

• element

• compound

• homogeneous mixture

• heterogeneous mixture

Which statement is NOT TRUE about the chemical equation?

• It does follow the law of conservation of mass.

• The products are the reactants rearranged in new forms.

• The number of atoms per element remains the same after the reaciton.

• The oxygen in the reactants is destroyed making it not follow the law of conservation of mass.

Tags

NGSS.MS-PS1-5

Which statement would be TRUE when comparing the pH scale?

• Milk is a strong acid and blood is a strong base.

• Batteries and drain cleaner are both considered corrosive.

• Adding water to soap will cause the soap be be acidic.

• Ammonia and vinegar are both bases.