Benchmark Quarter #1

SC.8. P.9.2 George painted a picture on a canvas, and he mixed some colors together because he wanted to make a particular shade of blue. Mixing paint is an example of what kind of process?

• Chemical Change

• Physical Change

• Forming a compound

• Dissolving one substance into another

SC.8. P.9.2 Chemical changes are accompanied by signs that show that a chemical reaction has occurred.  By making careful observations about the chemical reaction, a student can see one or more of these signs.  The signs will provide evidence that the event is not a physical change.  Which of the following is not likely to be evidence of a chemical change?

• A form of matter changes state from solid to liquid.

• A substance forms that releases heat and light.

• Carbon dioxide, water, and ash are produced.

• There are signs of rusting on a metal object.

Tags

NGSS.MS-PS1-2

SC.8. P.9.2 Derek left the ice cream out on the counter.  He noticed that the ice cream began to melt when it was left out at room temperature.  What process is Derek observing?

• Physical Change

• Chemical Change

• Chemical Reaction

• The formation of a new substance

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which of the following would definitely increase the rate of a reaction? (8.P.9.3)

• decrease the size of the container

• increase the size of the container

• decrease temperature

• increase temperature

Jamie has 3 glow sticks. She puts one in boiling water, another in ice water and another in room temperature water.  What situation below is correct? (8.P.9.3)

• The glow stick placed in the boiling water will be brightest but will last less time than the other glow sticks.

• The glow stick placed in the ice water will be the brightest but will last less time than the other glow sticks.

• The glow stick placed in the room temperature water will be the brightest and will last more time than the other glow sticks.

• All three glow sticks will have the same brightness for the same amount of time.

Tags

NGSS.MS-PS1-4

Increasing the temperature of a chemical reaction increases the reaction rate. Which of the following statement explains WHY? (8.P.9.3)

• Faster moving particles come in contact less often, which gives more chances for a reaction to happen.

• Faster moving particles come in contact more often, which gives more chances for a reaction to happen.

• Slower moving particles come in contact more often, which gives more chances for a reaction to happen.

• Slower moving particles come in contact less often, which gives more chances for a reaction to happen.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Jane performed an experiment in which one substance (X) underwent a chemical change to form two new substances (Y and Z). According to the Law of Conservation of Mass, which statement is correct about the chemical change? (8.P.9.1)

• The mass of Y and Z together is more than the mass of X.

• The mass of Y and Z together is the same as the mass of X.

• The mass of X is more than the mass of Y and Z together.

• The mass of X increased to create the mass of Y and Z.

Tags

NGSS.MS-PS1-5

In a chemical reaction, 300 grams of hydrogen peroxide are combined with 200 grams of manganese dioxide. According to the Law of Conservation of Mass, what will be the mass of the product? (8.P.9.1)

• 500g

• 300g

• 200g

• 100g

Tags

NGSS.MS-PS1-5

In which of the following situations does the Law of Conservation of Mass apply? (8.P.9.1)

• only in physical changes

• only in chemical changes

• in neither chemical and physical changes

• in both chemical and physical changes

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

SC.6. E.6.2 A delta is defined as a triangular mass of sediment, silt, and sand, deposited at the mouth of a river. Deltas form when a river flows into a body of standing water, such as a sea or lake, and deposits large quantities of sediment. They are usually crossed by numerous streams and channels and have exposed as well as submerged areas. Which process was primarily responsible for the formation of a delta?

• Glacial erosion

• Cementation of sediment

• Deposition of sediment

• Weather of rocks