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WorksheetsUnit 1 Review
Total questions: 127
Worksheet time: 2hrs 12mins
Explains something we see in the natural world that has been verified through repeated experiments or testing.
hypothesis
law
theory
Inference
This variable is the one thing that changed on purpose...
Dependent Variable
Control
Independent Variable
What is the DEPENDENT variable (effect) in this experiment?
"Does eating breakfast improve test scores?"
eating breakfast or not
the grade you got on the test
what time you get up in the morning
how tasty the breakfast is
You are testing how the amount you water a plant affects its growth. What would be the INDEPENDENT VARIABLE in this experiment.
They type of pot you put the plants in.
The amount you water each plant.
The amount of sunlight the plants get.
The amount the plant grows.
What are the constant variables?
what we are changing or testing
what we are observing or measuring
what we keep the same to make the experiment fair
The _ is an organized set of investigation procedures used by scientists.
scientific method
scientific law
scientific theory
A _ is a standard used for comparison; it is kept in "normal" conditions.
hypothesis
control group
dependent variable
control variables
A rule of nature that sums up related observations to describe a pattern in nature is a _.
scientific law
hypothesis
scientific theory
Identify the dependent variable according to this graph.
Seed Type
Number of Bird Species
Sunflower and Sorghum
Sunflower
What is the purpose of the scientific method?
to answer questions
to create solutions to problems
to collect data based on an experiement
to get peer reviewed
Glass breaking
Physical Change
Chemical Change
A rusting bicycle
Physical Change
Chemical Change
Freezing chocolate-covered bananas
Physical Change
Chemical Change
Separating sand from gravel
Physical Change
Chemical Change
Spoiling food
Physical Change
Chemical Change
Burning toast
Physical Change
Chemical Change
Is melting butter for popcorn a chemical or physical change?
chemical
physical
Rust on an iron bar is an example of chemical change.
True
False
When you break a cracker into pieces it is a...
Chemical change
Physical change
Which ones can be units for density?
(Multiple responses)
g/ mL
g
cm3g
cm4
What is the mass of a 25 cm3 liquid if it has a density of 5 g/cm3?
125 g
5 g
cm35g
0.2 cm3
In this image, the VOLUME of A is _____ the volume of B
equal to
greater than
less than
Calculate the density of the rectangular prism
2 g/cm3
4 g/cm3
6 g/cm3
8 g/cm3
What happens to the density of the balloon if volume is doubled?
The density is cut in half.
The density stays the same.
The density doubles.
Not enough information to tell.
As a substance is COOLED its VOLUME...
increase
decreases
remains equal
As a substance is COOLED it's DENSITY...
increase
decreases
remains equal
As a substance is HEATED it's DENSITY...
increase
decreases
remains equal
Three liquids and two solids are placed in a graduated cylinder. The substances arrange themselves in the cylinder according to their densities. Use the information to identify the liquids and solids in the graduated cylinder. start with the top solid as substance 1, and the top liquid as substance 2, and so on
Gold
Mercury
water
Gasoline
Cork
Using the equation ρ=Vm work out the density of this object.
2.7 m3kg
7.2 m3kg
0.72 m3kg
0.27 m3kg
What is the density of this cylinder?
0.077 m3kg
0.77 m3kg
7.7 m3kg
77 m3kg
What is the density of the sphere, if its mass is 50 g?
mL40 gr
g65mL
cm32 g
mL25g
Which box has a higher density?
A
B
They are the same
oil
water
syrup
A block of aluminum occupies a volume of 15 cm3 and has a mass of 40.5 g. What is its density?
.37 g/mL
605.5 g/mL
2.7 g/mL
25.5 g/mL
What metric unit of measurement is used to measure small volumes of liquid?
matter
cubic centimeter
mass
milliliter (mL)
What metric unit of measurement is used to measure small amounts of mass?
volume
cubic centimeter
gram
A block has a mass of 54g and a volume of 20cm3. What is the density of the block?
74 g/cm3
1080 g/cm3
34 g/cm3
2.7 g/cm3
Helium balloons rise on earth because
helium is less dense than air
helium is more dense than air
helium is cooler than air
helium is warmer than air
A Mixture is defined as
A combination of two or more substances that are not chemically combined
A combination of compounds that are chemically bonded
2 or more elements chemically bonded
Colloids are
Clear mixtures that have fully dissolved parts
A mixture that will separate into different parts when left to settle
A suspension that appears cloudy and scatters light
A solution that has all parts visible
A Taco is an example of a
Homogeneous Mixture
Heterogeneous Mixture
Every compound is a molecule but not every molecule is a compound.
Identify the substance in box B.
element
compund
mixture
Identify the substance in box D.
element
compound
mixture
All matter can be classified as _________.
elements or compounds
compounds or mixtures
pure substances or mixtures
Identify the substance in box Y.
element
compound
mixture
Identify the substance in box W.
element
compound
mixture
Identify this substance.
element
compound
mixture
Identify this substance.
element
compound
mixture
Identify this substance.
element
compound
mixture
What is the difference between a compound and a mixture?
one is made of only 1 element, the other is made of several elements
a mixture does not have a chemical formula
a compound can be made many different ways
Identify the substance.
element
compound
mixture
What is the difference between a pure substance and a mixture? Select all that apply.
substances are made of many different things while mixtures are just made of 1
a substance has one type of particle while a mixture has 2 or more types
a mixture is physically combined and can be physically separated while a substance is chemically bonded
a mixture is chemically bonded together while a substance is physically combined
What pure substance is made of 2 or more types of atoms?
compound
element
Identify the following
compound
homogeneous mixture
element
heterogeneous mixture
Identify the following
compound
homogeneous mixture
element
heterogeneous mixture
Identify the following
compound
homogeneous mixture
element
heterogeneous mixture
Identify the following
compound
homogeneous mixture
element
heterogeneous mixture
How many significant figures: 20 pencils.
2
1
unlimited
3
How many significant figures: 1300 cm.
5
2
4
How many significant figures: 0.0042 grams
4
5
2
How many significant figures: 358.2 ml.
4
5
unlimited
How many significant figures: 2.00 meters.
2
3
unlimited
How many significant figures: 145000 cm.
2
3
6
How many significant figures: 0.005003 L.
2
7
4
How many significant figures: 107 voters.
unlimited
3
2
How many significant figures: 0.8 meters.
2
1
unlimited
How many significant figures: 7.1 × 103
4
5
2
How many significant figures: 46.002 grams.
5
3
unlimited
How many significant figures: 60 minutes = 1 hour.
2
1
unlimited
How many significant figures: 10,800 mm.
2
3
5
How many significant figures: 1000 ants.
1
4
unlimited
How many significant figures: 0.0040005 km.
5
8
2
How many significant figures: 0.0950 meters.
5
3
2
How many significant figures: 60 seconds = 1 minute.
unlimited
2
1
How many significant figures: 9 innings in a baseball game.
1
unlimited
How many significant figures: 48.20 grams of salt.
4
3
unlimited
How many significant figures: 1.072 meters of twizzlers.
3
4
unlimited
Transform 354 grams into kilograms
0.354 kg
3.54 kg
35400 kg
3540 kg
In the conversion factor, which unit should be positioned in the numerator?
yards
leagues
feet
fathoms
In the conversion factor, which unit should be positioned in the denominator?
yards
leagues
feet
fathoms
Convert 2087 feet per second to kilometers per hour. Given that 1000𝑚=1𝑘𝑚 and 0.0254𝑚=1𝑖𝑛.
1356.51km/hr
2,290.02km/hr
5,463.07km/hr
1,636.58km/hr
5 cm/min = ______ m/day
(100 cm = 1 m)
Jackrabbits are capable of reaching speeds up to 40 miles per hour. How fast is this in feet per second? (Round to the nearest whole number.)
5,280 feet = 1 mile
95 feet per second
59 feet per second
.45 feet per second
40 feet per second
The human esophagus us about 250 mm log. How long is that in inches? 1 in = 2.54 cm
10.64 in
9.84 in
11.35 in
8.84 in
