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WorksheetsDCP 1 Review
Total questions: 95
Worksheet time: 56mins
A scientist performed four investigations using eight different liquids. In each investigation, the scientist combined two of the four liquids under a fume hood and recorded observations in the table below.
In which two investigations is it most likely that the liquids reacted chemically?
1
2
3
4
The graph below shows the motion of a ball rolling on a straight track. What is the ball’s average speed during the time represented in the graph?
0.2 m/s
0.5 m/s
5.0 m/s
10.0 m/s
A bus travels 40 km in 30 minutes. What is the average speed of the bus?
40 km/hr
80 km/hr
120 km/hr
1200 km/hr
Coal contains carbon and other elements. Carbon dioxide forms when coal burns in the presence of oxygen. What is the best evidence that chemical reaction occurs when coal burns?
The shape of the coal changes
Oxygen is present
Coal is made up of more than one element
A new substance is produced
Coal contains carbon and other elements. Carbon dioxide forms when coal burns in the presence of oxygen. What is the best evidence that chemical reaction occurs when coal burns?
The shape of the coal changes
Oxygen is present
Coal is made up of more than one element
A new substance is produced
For an investigation a student poured a blue solution of CuSO4 into a beaker. The student placed a shiny, silver-colored strip of zinc metal in the solution and observed the changes.
The student inferred that a chemical reaction occurred. What evidence supports this inference?
A dark solid formed on zinc metal.
The zinc metal remained silver-colored and shiny
The CuSO4 soultion turned blue when the zinc metal was added
None of these
A silver ring reacts with compounds containing sulfur in the air to form silver sulfide, a black substance that makes up the tarnish from the ring, students placed it in a pan lined with aluminum foil and added hot water. Baking soda was added to the hot water and stirred. Students made observation about the process.
What observation of this process provides evidence of a chemical reaction?
Hot water heated the aluminum foil
The liquid solution changed color
The pan was lined with aluminum foil
The hot water colored
A girl on a bike rides down a hill 500 meters long in 50 seconds. What is her speed?
100 m/s
10 m/s
1,000 m/s
10 mph
You are going to race your friend to a tree near the back of the playground. The tress is 24 meters away from where you stand. It will take you 4 seconds to reach the tree. What will your average speed be?
6 mph
16 m/s
60 m/s
6 m/s
What is the formula for speed?
speed = distance x time
speed=distance / time
speed = time / distance
speed = distance + time
What does the solid line on this graph represent?
Constant speed
Acceleration
At rest
deceleration
What does this graph represent?
Constant speed
Acceleration
Not moving
what is the motion described in the graph
all of above
constant speed
acceleration
constant position
H2O
As
Which of the following is a example of physical change ?
burning of wood
photosynthesis
melting of ice-cream
ripening of fruit
Wood that is burning in a brush pile has heat, and produces ashes.
Physical
Chemical
Which of the following is a physical change?
Dissolving
Rapid release of heat
Fizzing (release of gas)
Rusting
A change in the size, shape, or state of matter.
chemical change
physical change
Which of the following is NOT an example of a physical change?
crumpling paper
sharpening a pencil
clothes shrinking
sour milk
A change in which NEW substances are formed.
Chemical change
Physical change
Chewing food is a
physical change
chemical change
What is an example of a physical change that happens inside your body?
Food being broken down by acids in your stomach.
Food being broken down into small pieces by your teeth.
Food being moved to your stomach.
Water being absorbed inside your large intestine.
What is an example of a chemical change that happens inside your body?
Food being broken down by acids in your stomach.
Food being broken down into small pieces by your teeth.
Food being moved to your stomach.
Water being absorbed inside your large intestine.
Na--- Element or compound? (COUNT THE CAPITAL LETTERS)
Compound
Element
How many different elements are in a compound with the formula H2CrO4? (COUNT THE CAPITAL LETTERS)
1 Element
2 Elements
3 Elements
CH4-- Element or Compound? (COUNT THE CAPITAL LETTERS)
Compound
Element
At which point did the ball have both the greatest kinetic energy and the least potential energy?
Position 1
Position 2
Position 3
Position 4
The picture shows two birds flying at the same speed. The bird on the left is flying 50m higher than the bird on the right. Which statement best describes the energy of the two birds?
The bird on the left has greater kinetic energy than the bird on the right.
The two birds have the same potential energy but different kinetic energies.
The bird on the right has more potential energy than the bird on the left.
The two birds have the same kinetic energy but different potential energies.
FunFrau's science classes studied the diagram above of the movement of water in a hydroelectric dam. The students used the diagram to describe the changes in the potential and kinetic energy of the water. At which location is the gravitational potential energy of the water the greatest?
Location E
Location F
Location G
Location H
A runner eats breakfast and then he goes for a jog. Which of the following energy transformations occurred during the jog?
Chemical energy to mechanical energy
Mechanical energy to chemical energy
Chemical energy to light energy
Electrical energy to chemical energy
Imagine a rocket just before and after it lifts off. The rocket is powered by a fuel mixture that is contained within the rocket. Which sequence best identifies the energy transfers that take place as the rocket lifts off?
Mechanical > Light > Chemical
Chemical > Mechanical > Thermal
Thermal > Chemical > Light
Chemical > Thermal > Mechanical
A chef struck a match against the box to light it. What statement best describes the energy changes that occur?
The thermal energy stored in the match changes to light energy and chemical energy.
The light energy and thermal energy stored in the match changed to mechanical energy.
The chemical energy stored in the match changed to thermal energy and light energy.
The light energy and thermal energy stored in the match changed to chemical energy.
The hot air balloon above is beginning to rise. The man is seen using the propane tank at the opening of the balloon. What energy transformations occur when the propane gas is used to lift the hot air balloon?
Chemical energy to thermal energy to mechanical energy
Light energy to fire energy to air energy
Chemical energy to mechanical energy to thermal energy
Thermal energy to chemical energy to light energy
A baby eats bananas and then used the energy from the bananas to crawl. The baby's body converts...
Chemical energy to mechanical energy
Electrical energy to light energy
Electrical energy to chemical energy
Mechanical energy to chemical energy
A diagram of a circuit is shown above. Which sequence best identifies the energy transfers that take place within the circuit?
Mechanical energy to light and sound energy to electrical energy
Light and sound energy to electrical energy to chemical energy
Chemical energy to mechanical energy to electrical energy to light energy
Mechanical energy to chemical energy to electrical energy to light energy
Aaron's bowling ball had rolled down the lane getting faster and faster. Which statement is true?
The bowling ball will continue to roll down the lane with the same potential and kinetic energy.
The bowling ball is gaining more potential energy from Aaron's force.
Aaron's ball's potential energy is changing to kinetic energy.
The bowling ball will quickly lose kinetic energy as it rolls down the lane.
Copper tarnishing is an example of a ___________ change.
physical
chemical
Which process is a sign of a chemical change?
A rotting potato gives off a bad smell
A melting block of ice leaves a large puddle
A cloud quickly changes shape when blown by wind
A plaster statue breaks when it falls onto the floor
Which process is an example of a physical change?
Cutting Carrots into pieces and mixed in a salad
A peanut butter and jelly sandwich being digested
Sodium metal and water combining to form a compound and a gas
Sodium metal and chlorine gas combined to form table salt
Which observations prove a chemical change occurred ?
Dissolving and expected color change
Mixing and dissolving
State of matter change and boiling water bubbles
Unexpected color change and temperature change
Which of the following are examples of a Chemical Change?
Iron Rusting
Gas Burning
Breaking a glass
Boiling water
Burning Wood
A washing machine turns electrical energy into
Light energy
Chemical energy
Mechanical energy
The pickup truck has a changing velocity because the pickup truck--
What does the picture represent ?
physical change
chemical change
A white tablet is dropped into water. The water becomes cloudy and bubbles are produced. What type of change has occurred?
Physical change
Chemical change
No change
SE6.5A Bethanie is using the chemical formulas for various substances to classify them as either a compound or an element. Which of the following should Bethanie classify as a compound?
methane - CH4
carbon - C
silicon - Si
silver - Ag
Which list includes chemical changes only?
A
B
C
D
Match the following vocabulary terms to their definition
Element
a pure substance that cannot be broken down chemically into simpler substances
Compound
a pure substance made by chemically combining two or more elements
Chemical formula
elements are represented by their symbols and subscripts represent the number of atoms
Chemical symbol
written as a capital letter or a capital letter followed by a lowercase letter
Physical change
change which alters the physical properties of a substance without changing its identity
Which segment shows the faster speed?
A to B
C to D
B to C
What is the motion of the object from segment D to E?
It is moving slowly
It is returning to the starting point
It is moving quickly
It is not moving
What does a negative sloped line mean on a position vs time graph?
The object is not moving at all
The object is slowing down.
The object is moving at a constant speed back to where it started.
Which slope represents the fastest speed?
A
B
C
D
