Matter

Substances A and B are both white crystals. A student stirs 5 grams of substance A into one container of water, and 5 grams of substance B into another container of water. After ten minutes none of substance A is visible in its container and all of the crystals of substance B can be seen on the bottom of its container. What is the most likely conclusion that can be drawn from these observations?

• Substance A is soluble in water and Substance B is not.

• Neither Substance A nor Substance B is soluble in water.

• A & B

• None of the above

Students tested four different containers of hot water. Each started at a different temperature. They measured the beginning and ending temperature 20 minutes apart, and picked the best insulated container from that info. What could they have done to have a better supported conclusion?

• Took more temperature measurements

• Had more containers

• Started all of them at the same temperature

• Nothing, they eliminated all variables.

If I place 3 objects in water, and one floats while two sink, what is a correct interpretation of the data?

• 1 object was more dense than the other 2

• 2 objects were less dense than the other 1

• all 3 objects were less dense than the water

• 1 object was less dense than the other 2

What experiment would place a steel rod and a copper penny in different classifications?

• float/sink in water

• magnetic/nonmagnetic

• conductor electricity/does not conduct electricity

• conductor of heat/ does not conduct heat

Steel pieces and aluminum pieces have gotten mixed together in a container. What is an easy way to separate the steel from the aluminum?

• put it in water and the steel will float

• get a bag to carry them

• use a magnet to attract the aluminum

• use a magnet to attract the steel

If salt is mixed into a liquid until it disappears, then it is

• gone

• evaporated

• evenly distributed

• not salt anymore

How large are the particles that make up matter?

• about the size of a golf ball

• as large as a beach ball

• marble sized

• too small to see with the human eye

What can be added to baking soda to cause a chemical reaction?

• water

• soda

• vinegar

• flour

If two liquids are mixed and become a solid, what has taken place?

• Chemical reaction

• Physical reaction

• Property

• Solubility

What tool is used to measure mass?

• beaker

• pan scale/balance

• graduated cylindar

• thermometer