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MC |
7th Grade Integrated Science |
Standard: 02 |
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Objective: 01. Examine the effects of density and particle size on the behavior of materials in mixtures. |
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ILO: |
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Water has a density of 1 gram/milliliter. There are four rocks that all have the same volume of 5 cubic centimeters. The mass for each of these rocks is given below. Which one of the four rocks will float when placed in water?
a. 15 grams
b. 10 grams
c. 6 grams
d. 4 grams
Correct Answer: d
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MC |
7th Grade Integrated Science |
Standard: 02 |
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Objective: 01. Examine the effects of density and particle size on the behavior of materials in mixtures. |
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ILO: |
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A rock and a
lead weight both sink when dropped into a lake. What do you know about their densities?
a. They have the same density.
b. They have different densities.
c. They are denser than water.
d. They are less dense than water.
Correct Answer:
c
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MC |
7th Grade Integrated Science |
Standard: 02 |
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Objective: 01. Examine the effects of density and particle size on the behavior of materials in mixtures. |
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ILO: |
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An egg sinks in
water but floats in salt water. What do
you know about the density of the egg?
a. It is more dense than water but less dense
than salt water.
b. It is less dense than water and less dense
than salt water
c. It is denser than water and denser than salt
water.
d. It is less dense than water but more dense
than salt water.
Correct Answer:
a
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MC |
7th Grade Integrated Science |
Standard: 02 |
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Objective: 01. Examine the effects of density and particle size on the behavior of materials in mixtures. |
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ILO: |
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A balloon filled
with helium rises into the air. Why?
a. The balloon is larger than air.
b. The balloon is heavier than air.
c. The helium is less dense than air.
d. The helium is more dense than air.
Correct Answer:
c
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MC |
7th Grade Integrated Science |
Standard: 02 |
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Objective: 01. Examine the effects of density and particle size on the behavior of materials in mixtures. |
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ILO: |
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Water has a
density of 1 g/mL. What density might a
typical rock be?
a. .005 g/cm3
b. .5 g/cm3
c. 5 g/cm3
d. 50 g/cm3
Correct Answer:
c
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MC |
7th Grade Integrated Science |
Standard: 02 |
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Objective: 01. Examine the effects of density and particle size on the behavior of materials in mixtures. |
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ILO: |
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Salad dressing
separates into two layers. Oil is on
the top and vinegar is on the bottom.
When will the vinegar be on the top layer?
a. When there is more oil than vinegar.
b. When there is more vinegar than oil
c. When they are added in different order.
d. Never, under normal conditions.
Correct Answer:
d
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MC |
7th Grade Integrated Science |
Standard: 02 |
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Objective: 01. Examine the effects of density and particle size on the behavior of materials in mixtures. |
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ILO: |
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A beach is
composed of particles of sand of the same size. Why doesn’t the beach have materials of all sizes? The particles have
a. come from the same place.
b. come to the beach at the same time.
c. been found in underwater canyons.
d. been sorted by size and density.
Correct Answer:
d
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MC |
7th Grade Integrated Science |
Standard: 02 |
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Objective: 01. Examine the effects of density and particle size on the behavior of materials in mixtures. |
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ILO: |
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A streambed
contains round rocks, all about the same size.
Why are there no smaller particles of sand and clay? Sand and clay
a. is denser.
b. have washed away.
c. were never there.
d. are too small to see.
Correct Answer:
b
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MC |
7th Grade Integrated Science |
Standard: 02 |
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Objective: 01. Examine the effects of density and particle size on the behavior of materials in mixtures. |
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ILO: |
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A road cut
reveals layers in the soil. Why does soil have layers?
a. It has been sorted by particle size and
density.
b. It is made from rock and other particles.
c. It was placed in layers by humans.
d. The layers have always been there.
Correct Answer:
a
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MC |
7th Grade Integrated Science |
Standard: 02 |
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Objective: 01. Examine the effects of density and particle size on the behavior of materials in mixtures. |
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ILO: |
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During a flash
flood, large boulders can be moved downstream.
Why don’t large boulders usually move?
a. They are made from very dense materials.
b. They are too heavy.
c. They are attached to the stream bottom.
d. They are weathered and eroded in place.
Correct Answer:
b
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MC |
7th Grade Integrated Science |
Standard: 02 |
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Objective: 01. Examine the effects of density and particle size on the behavior of materials in mixtures. |
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ILO: |
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Where would the
smallest particles of rock be found in a streambed?
a. In the strongest current
b. In the weakest current
c. Near the middle
d. At the beginning
Correct Answer:
b
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MC |
7th Grade Integrated Science |
Standard: 02 |
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Objective: 01. Examine the effects of density and particle size on the behavior of materials in mixtures. |
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ILO: |
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In an
experiment, students shook jars of water with soil and rock in them. What does the shaking model in nature?
a. A lake environment
b. A stream current
c. Living things in an environment
d. A rainstorm
Correct Answer:
b
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MC |
7th Grade Integrated Science |
Standard: 02 |
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Objective: 01. Examine the effects of density and particle size on the behavior of materials in mixtures. |
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ILO: |
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Which question
would help a student learn more about the behavior of materials in a mixture?
a. Does lake water rise in warm winters?
b. How do rocks and minerals form?
c. Why are grains of beach sand alike?
d. How is a living thing organized?
Correct Answer:
c
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MC |
7th Grade Integrated Science |
Standard: 02 |
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Objective: 01. Examine the effects of density and particle size on the behavior of materials in mixtures. |
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ILO: |
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Which data would
help explain layers in a road cut?
a. The thickness of the layers.
b. The color of the layers.
c. Where the layers came from.
d. The density of the layer
Correct Answer:
d
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MC |
7th Grade Integrated Science |
Standard: 02 |
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Objective: 01. Examine the effects of density and particle size on the behavior of materials in mixtures. |
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ILO: |
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A lake study
reveals larger particles near the mouth of an incoming stream and smaller ones
in the center of the lake. What
inference can be made from these observations?
a. The particles are being sorted by size.
b. The particles are made of different
materials.
c. The particles are different densities.
d. The particles are traveling at different
speeds.
Correct Answer:
a
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MC |
7th Grade Integrated Science |
Standard: 02 |
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Objective: 01. Examine the effects of density and particle size on the behavior of materials in mixtures. |
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ILO: |
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Sand with
particles of the same size was gently shaken in a jar to see if layers would
form. What variable was being tested?
a. particle size
b. particle density
c.
particle color
d. particle type
Correct Answer:
b
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MC |
7th Grade Integrated Science |
Standard: 02 |
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Objective: 01. Examine the effects of density and particle size on the behavior of materials in mixtures. |
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ILO: |
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A student was given an assignment to calculate the density of a rock. Which of the following would best describe one of the needed steps to calculating the rock’s density?
a. The student puts the rock in an empty graduated cylinder and records the measurement in milliliters.
b. The student puts the rock in a graduated cylinder filled with water and records the volume of the rock.
c. The student uses a thermometer to measure the temperature of the rock in Celsius degrees.
d. The student measures the length of the rock in centimeters with a metric ruler.
Correct Answer: b
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MC |
7th Grade Integrated Science |
Standard: 02 |
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Objective: 01. Examine the effects of density and particle size on the behavior of materials in mixtures. |
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ILO: |
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A student
collected data about the density of air.
She found that .1 g of air had a volume of 100 cm3 .
What is the density of the air?
a. .001 g/ cm3
b. .01 g/cm
c. .1 g/cm3
d. 1.0 g/cm3
Correct Answer:
a
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MC |
7th Grade Integrated Science |
Standard: 02 |
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Objective: 01. Examine the effects of density and particle size on the behavior of materials in mixtures. |
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ILO: |
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A rock dropped
in a graduated cylinder raises the level of water from 20 to 35 mL. The rock has a mass of 45 g. What is the density of the rock?
a. 1.3 g/ cm3
b. 2.3 g/ cm3
c. 3.0 g cm3
d. 4.5 g/ cm3
Correct Answer:
c
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MC |
7th Grade Integrated Science |
Standard: 02 |
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Objective: 01. Examine the effects of density and particle size on the behavior of materials in mixtures. |
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ILO: |
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A liquid is
found to have a volume of 75 mL in a graduated cylinder. When placed on a balance, the liquid and
graduated cylinder has a mass of 125 g.
The empty graduated cylinder has a mass of 50 g. What is the density of the liquid?
a. .1 g/mL
b. 1 g/mL
c. 2.2 g/mL
d. 22g/mL
Correct Answer:
b
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MC |
7th Grade Integrated Science |
Standard: 02 |
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Objective: 01. Examine the effects of density and particle size on the behavior of materials in mixtures. |
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ILO: |
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A liquid has a
density of 1g/mL. If you have 50 mL of
the liquid, what would its mass be?
a. 25 g
b. 50 g
c. 75 g
d. 100g
Correct Answer:
b
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MC |
7th Grade Integrated Science |
Standard: 02 |
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Objective: 01. Examine the effects of density and particle size on the behavior of materials in mixtures. |
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ILO: |
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A square chunk
of plastic has a length of 5 cm, width of 5 cm and height of 5 cm. It has a mass of 200 g. What is its density?
a. .12 g/cm3
b. 1.0 g/cm3
c. 1.6 g/cm3
d. 2.3 g/cm3
Correct Answer:
c
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MC |
7th Grade Integrated Science |
Standard: 02 |
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Objective: 01. Examine the effects of density and particle size on the behavior of materials in mixtures. |
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ILO: |
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A student shakes
a jar with a mixture of sand types.
Instead of mixing, the sand grains separate into layers. Why?
a. The grains are different colors.
b. The grains have different shapes.
c. The grains have different densities.
d. The jar has a round shape.
Correct Answer:
c
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MC |
7th Grade Integrated Science |
Standard: 02 |
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Objective: 01. Examine the effects of density and particle size on the behavior of materials in mixtures. |
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ILO: |
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Water is added
to a jar with soil in it and the jar is shaken. Which drawing shows what will
happen after it sits for a few minutes?
a.
b. c. d.
Correct Answer:
d
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MC |
7th Grade Integrated Science |
Standard: 02 |
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Objective: 01. Examine the effects of density and particle size on the behavior of materials in mixtures. |
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ILO: |
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Put the following items into a test tube, shake it up, and predict the outcome of your investigation. Earth materials: air, gravel, water, sand and gold dust.
a. From bottom to top: gravel, gold dust, sand, water, air.
b. From bottom to top: gold dust, gravel, sand, water, air.
c. From top to bottom: air, water, gold dust, sand, gravel.
d. From bottom to top: water mixed in with layered gravel, sand, and gold dust, with air above the mixture.
Correct Answer: d
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MC |
7th Grade Integrated Science |
Standard: 02 |
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Objective: 01. Examine the effects of density and particle size on the behavior of materials in mixtures. |
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ILO: |
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In the spring,
rivers in Utah are often brown in color.
A sample of the water shows it contains very small particles of
silt. Why is silt suspended in the
water?
a. Silt is in brown in color.
b. The water is moving rapidly.
c. Silt is small with low density.
d. Water has a high density.
Correct Answer:
c
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MC |
7th Grade Integrated Science |
Standard: 02 |
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Objective: 01. Examine the effects of density and particle size on the behavior of materials in mixtures. |
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ILO: |
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Gold panning
separates gold flakes from stream gravel by shaking the mixture in a pan and
scraping the gravel layers off. Why are
the tiny gold particles found on the bottom on the pan?
a. They are larger than the gravel.
b. They are denser than the gravel.
c. They are brighter in color than the gravel.
d. They are harder to find than the gravel.
Correct Answer:
b
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MC |
7th Grade Integrated Science |
Standard: 02 |
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Objective: 01. Examine the effects of density and particle size on the behavior of materials in mixtures. |
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ILO: |
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In winter, a
layer of cold air settles in the valleys and warmer air is often found higher
in the mountains. What might account
for this condition?
a. There is more warm air than cold air.
b. There is more cold air than warm air.
c. Cold air is less dense than warm air.
d. Cold air is denser than warm air.
Correct Answer:
d
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I |
7th Grade Integrated Science |
Standard: 02 |
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Objective: 01. Examine the effects of density and particle size on the behavior of materials in mixtures. |
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ILO: |
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Use this data to
answer the next two questions:
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Substance |
Density |
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Oil |
.8 g/mL |
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Water |
1.0 g/mL |
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Plastic |
.9 g/ cm3 |