Matter Test 1.1

Which is an example of a physical change?

• Mixing blue and yellow paint to create green paint

• Adding water and yeast to bread dough in order to make it raise.

• Mixing two liquids together in a test tube and the tube becoming warm.

• Mixing two liquids together in a test tube and the tube becoming warm.

water freezing to form ice

melting a gold chain to create a gold ring

breaking a window into smaller pieces

• chemical change.

• physical change.

• chemical decomposition.

• increasing surface volume.

Ben and Jerry were testing powders in science lab. First they put the powder in a zip lock bag. Next they added some water. The powder fizzed and bubbled; soon it disappeared. When the bubbling stopped the bag contained a clear liquid and a lot of gas.

What is the MOST OBVIOUS sign of a chemical change in this reaction.

• A gas was produced.

• The powder mixed with the water.

• There was a change in temperature.

• The powder dissolved in the water.

Tags

NGSS.MS-PS1-2

This flask originally held some copper wire and a clear solution of nitric acid. The two substances reacted and produced a brown gas and a blue solution. This reaction cannot be reversed. Evidence of a chemical reaction is shown by

• ice forming.

• steam rising.

• the formation of a gas.

• a change in state from a solid to a liquid.

Tags

NGSS.MS-PS1-2

What is the name of the reaction in which energy is absorbed?

• exothermic
• endothermic
• chemcial
• physical

Tags

NGSS.MS-PS1-4

NGSS.MS-PS1-2

Which is an example of a physical change?

• an iron nail rusting

• silver changing into a liquid when heated

• an egg cooking

• a cake baking

Is it possible for equal volumes of different substances to have different densities?

• no, if the volume is the same, the density would be the same

• no, volume always correlates to density

• it's impossible

• yes, density is a unique physical property

Which of these are physical properties of all metals?

• malleable

• good conductors of heat and electricity

• ductile

• all answers are correct

If a magnetic white board was chopped into 1000 pieces, all the pieces would be _________.

• non-magnetic

• chemically changed

• magnetic

• less dense

Tags

NGSS.MS-PS2-3

If a giant wood block has a density of .95 g/cm3, how would you find the density of just a chip

• you would divide by the mass of the chip

• it would be the same as the giant block

• you would re-calculate using mass/volume

• there's no telling