8th Grade Science Final Review 2017
8th Grade Science Final Review
Test your knowledge and understanding of key 8th grade science concepts with our comprehensive final review quiz! With 38 multiple choice and checkbox questions, you can gauge your mastery of essential science topics.
Features of the quiz include:
- Variety of question types
- Covers core topics in chemistry, physics, and biology
- Interactive and engaging format
Which of the following states the law of conservation of mass ?
Energy is neither created nor destroyed in a chemical reaction.
Atoms are rearranged in a reaction and join new molecules.
Mass cannot be created or destroyed in a chemical reaction.
Compounds form a new compound with different properties.
Limewater with a pH of 10.5 is a(n)
Proteins
Ionic
Salt
Acid
Base
Nucleic acid
Covalent
Hydrogen gas
Oxygen gas
When an acid neutralizes a base, a(n) ____________ is formed.
Proteins
Ionic
Salt
Acid
Base
Nucleic acid
Covalent
Hydrogen gas
Oxygen gas
Acids can create __________ by reacting with metals.
Flavor
Hydrogen gas
Indicator
Oxygen gas
Would you expect the pH sample of acid rain to be 4 or 9? Why?
9 b/c acid is higher on the pH scale
4 b/c acid is lower on the pH scale
What products would form when hydrochloric acid. HCl, and sodium hydroxide, NaOH, react?
NaCl2 + H2O
NaCl+H2O
What is the difference between a reactant and a catalyst?
There is no difference.
A reactant changes to form the product, a catalyst is unchanged.
In what ways do changes in pH affect the environment and living things? Give two ways.
- they make organisms live longer. - they clean ponds and lakes
- they kill living organisms through acid rain. - they ruin ponds and lakes through acid rain.
An ionic compound formed from the positive ion of a base and the negative ion of an acid.
Hydrocarbon
Chemical bond
Indicator
Salt
PH
Lipid
Covalent compound
Nucleic acid
As you are travelling on spring break you watch your iPad. If you are the reference point and the iPad is the object, then is the iPad in motion? Why or why not?
No, because you are holding the iPad and it is not moving away from the reference pount
The iPad is in motion because the iPad has a reference point that is not in motion
When one variable increases and another decreases at the same time
Trajectory
Displacement
Distance
Directly proportional
Inversely proportional
X-axis
Y-axis
Z-axis
Tool used to show distance or displacement from an origin
Reference point
Speed
Coordinate
Motion
The speed of light is 300,000,000 m/s. How long does it take light to travel the 58,000,000,000 m distance from the sun to Mercury? Convert answer to minutes and round to the nearest tenth.
193.3 minutes
3.2 minutes
A graph shows a roller coaster moving up hill. What does the straight upward slope on the graph show
Positive velocity
Negative velocity
Negative acceleration
Positive acceleration
Which of the following best represents acceleration as presented on a graph?
Velocity change vs time
Distance change vs time
Motion change vs time
Speed change vs time
In which of the following is a skater NOT accelerating?
Making circles at a constant speed
Going straight while slowing down
Going straight at a constant speed
Going straight while speeding up
The speed formula, s=D/T, speed and time are
Increasing
Machs
Instantaneous speed
Velocity
Reference point
Motion
Accelerating
Decreasing
Speed
Inversely proportional
Slope
Distance
Average speed
Uniform speed
Describe how to determine average speed.
Multiply distance x time. Multiply time x time. Divide first product by second product.
Distance traveled divided by time taken
As the value of one variable increases, the value of the other decreases at the same time
Inversely proportional
Directly proportional
Value of one variable increases, and the other variable increases at the same rate
Inversely proportional
Directly proportional
Change in velocity divided by the time it takes for the change to occur
Average speed
Acceleration
Which of the following is the energy that comes from changes in an atom's nucleus?
Chemical energy
Thermal energy
Nuclear energy
Light energy
Which of the following types of energy comes from a compound that changes as its atoms are rearranged?
Chemical energy
Thermal energy
Nuclear energy
Light energy
As a baseball flies through the air after being hit, which of the following types of energy does it have?
Kinetic energy
Chemical energy
Potential energy
Mechanical energy
Which energy is caused by an objects vibrations?
Chemical energy
Sound energy
Electrical energy
Thermal energy
If a moving object collides with an object at rest and the two objects stick together, their combined momentum will be ___________.
More than the original momentum of the object
Double the original momentum of the moving object
Equal to the original momentum of the moving object
Less than the original momentum of the moving object
The energy of moving electrons is called _________.
Fusion
Light energy
Electrical energy
Energy
Fission
Thermal energy
Potential energy
Kinetic energy
The energy made by the vibrations of charged particles is called
Fusion
Light energy
Electrical energy
Energy
Fission
Thermal energy
Potential energy
Kinetic energy
In nuclear fission, the nucleus of a(n) __________ atom is split into tow smaller nuclei that release nuclear energy.
Hydrogen
Uranium
Plutonium
The energy equal to how much work is needed to lift an object to a certain height is called __________.
Potential energy
Fission
Kinetic energy
Gravitational potential energy
Fusion
Mechanical energy
Where does the sun get its energy to light and heat our Earth?
From particles that generate thermal energy
From nuclear fusion
Why does a stretched bow have potential energy?
B/c once its released, it has KE
B/c it is based on the position
When a musician pulls the strings of a guitar, what happens to make the sound reach your ear?
The strings move which makes KE and that creates vibrations that send noises to your ears.
The string will have PE, it will vibrate when they let it go, it gets KE which gives sound energy that travels through the air which will travel through a medium and into your ear.
The energy of moving electrons
Electrical energy
Kinetic energy
Light energy
The energy that is produced by vibrations of electrically charged particles
Kinetic energy
Light energy
Electrical energy
How much momentum does it take to stop a 55 kg person travelling at 32 m/s?
1,760 kgm/s
-1,760 kgm/s
A 2,000 kg car travelling at 22 m/s collides with a 500 kg moose moving -1 m/s. If the moose stays on the car, then what is the velocity of the car + moose combination (nearest tenth)?
Velocity of car and moose= 17.4 m/s
Velocity of car and moose= 21.9 m/s
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