8th Grade Science CBA Review

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Multiple Choice

If there are two forces going in the same direction how would you find the net force?

• Subtract
• Add
• Neither
• Multiply

Multiple Choice

Calculate the net force shown in the  diagram?

• 0N
• 400 N
• 600 N
• 800 N

Multiple Choice

What is the Net Force and the direction of the object's movement as a result of the net force?

• 5N, Right

• 5N, Left

• 9N, Right

• 9N, Left

Multiple Choice

What is the Net Force and the direction of the object's movement as a result of the net force?

• 11N, Right

• 11N, Left

• 1N, Left

• 1N, Right

Multiple Choice

What is the resultant/ net force?

• 30 N left

• 25 N right

• 5 N left

• 55 N right

Calculating Speed​

6.8C calculate average speed using distance and time.​

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Multiple Choice

Which two measurements are needed in order to calculate the speed of an object in motion?

• distance and time

• time and mass

• force and distance

• volume and time

Multiple Choice

What is this objects speed at 2 s?

• 5 m/s
• 5 s/m
• 20 m/s
• 20 s/m

Multiple Choice

A biker rides at a speed of 15 km/hr for 3 hours. How far did he go?

• 5 hours
• 45 km
• 45 km/hr
• 0.33 km/hr

SVA

8.6B: differentiate between speed, velocity, and acceleration.​

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Multiple Choice

Speed with direction.

• Speed
• Velocity
• Acceleration

Multiple Choice

The distance an object travels in a specific amount of time.

• Speed
• Velocity
• Acceleration

Multiple Choice

An object speeding up, slowing down, and/or changing directions.

• Speed
• Velocity
• Acceleration

Multiple Choice

The boat moves to the left at a speed of 4 m/s. The current moves to the right at 2 m/s. What will happen if the current increases to 3 m/s?

• The boat will speed up.
• The boat will slow down. 
• The boat will move backwards.
• The boat will continue sailing to the left at a constant speed of 4 m/s.

Newton's Laws of Motion

8.6C: investigate and describe applications of Newton's three laws of motion such as in vehicle restraints, sports activities, amusement park rides, Earth's tectonic activities, and rocket launches.

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Multiple Choice

What law of motion does this picture represent?

• Newtons 1st law
• Newtons 4th law 
• Newtons 3rd law 
• Newtons 2nd law

Multiple Choice

An object in motion stays in motion and an object at rest stays at rest UNLESS

• acted on by a balanced force.

• acted on by an unbalanced force.

Multiple Choice

What is the formula for the 2nd law of motion?

• a=lw

• F=m/a

• F=ma

Multiple Choice

Force is related to mass and acceleration. Which law is this?

• Law 1

• Law 2

• Law 3

Multiple Choice

When a heavy football player and a light one run into each other, who exerts more force?

• The heavy one
• The light one
• They are equal
• There is no such thing as force 

Calculating Force

8.6C: investigate and describe applications of Newton's three laws of motion such as in vehicle restraints, sports activities, amusement park rides, Earth's tectonic activities, and rocket launches.

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Multiple Choice

How much force is needed to accelerate a 25kg bowling ball at 2m/s². 

• 50N
• 5N
• 12.5N
• 100N

Fill in the Blank

How much force is required to accelerate a 1,800 kg truck at 3 m/s²? _____ Newtons

Multiple Choice

What is the force on a 2.4 kg skateboard accelerating at a rate of 2 m/s²?

• 4.8 N

• 1.2 N

• 0.83 N

• 2 N

Multiple Choice

A force of 250 N is applied to an object that accelerates at a rate of 5 m/sec². What is the mass of the object?

• 50 g

• 1250 g

• 0.02 g

• 25 g

Plate Tectonics

8.98 relate plate tectonics to the formation of crustal features.

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Multiple Choice

The San Andreas fault is an example of which type of boundary?

• transform

• divergent

• convergent

• universal

Multiple Choice

Which feature forms at convergent boundaries?

• trench

• rift valley

• mountain range

• mid-ocean ridge

Multiple Choice

• divergent boundary

• convergent boundary

• transform boundary

Multiple Choice

• divergent boundary

• convergent boundary

• transform boundary

Multiple Choice

Subduction means.....

• one plate goes under another plate

• two plates slide past each other

• two plate collide and form folded mountains

Topographic Maps

8.9C interpret topographic maps and satellite views to identify

land and erosional features and predict how these features may be reshaped by weathering.

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Multiple Choice

What is the elevation of Y?

• Between 120-140 meters
• Between 100-120 meters
• Between 140-160 meters
• Between 80-100 meters

Multiple Choice

What is the highest elevation on this map?

• Over 320 meters
• Over 450 meters
• Over 220 meters
• Over 380 meters

Multiple Choice

Which topographic map matches formation C?

• 1
• 2
• 3
• 4

Multiple Choice

If contour lines are close together, then the slope is

• gentle
• steep
• flat
• going up and down

Day/Night/Seasons

8. 7 A model and illustrate how the tilted Earth rotates on its axis, causing day and night, and revolves around the Sun causing changes in seasons.

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Multiple Choice

The spinning of an object on its axis is called______

• orbit
• rotation
• revolution
• tide

Multiple Choice

How long does it take the Earth to make one REVOLUTION around the Sun?

• 12 hours
• 24 hours
• 365 days
• 29.5 days

Multiple Choice

1. How many degrees is Earth tilted?

• None. The Earth is not tilted.
• 230 degrees.
• 23.5 degrees

Multiple Choice

Which season is taking place in the Northern Hemisphere in Position 1?

• Winter
• Spring
• Summer
• Fall

Multiple Choice

Which term describes the movement of the Earth around the sun

• Rotation

• Revolution

• Spinning

• Precession

Tides

8.7C relate the position of the Moon and Sun to their effect on ocean tides.

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Multiple Choice

What is a difference between spring and neap tides?

• Spring tides occur when the earth and sun are IN LINE with the new or full moon. 
• Spring tides occur when moon in 3rd or 1st quarter phases
• Spring tides are LOWER than neap tides
• Spring tides occur in Spring and neap tides can occur in any season

Multiple Choice

What type of tide would this arrangement of earth-moon-sun create?

• full moon tide
• new moon tide
• neap tide
• spring tide

Multiple Choice

The Moon has a greater influence on Earth tides than the Sun because...

• it is smaller than the Sun
• it revolves around the Earth
• it is closer to the Earth

Moon Phases

8.78 demonstrate and predict the sequence of events in the lunar cycle.

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Multiple Choice

Look at the diagram of phases of the Moon. What phase does Day 14 represent?

• waxing moon

• new moon

• full moon

• waning moon

Multiple Choice

What moon phase will be observed after the waning crescent?

Multiple Choice

The image shows how the moon looks during the lunar cycle. The moon will look this way again in about -

• one week

• one month

• one year

• one century

Multiple Choice

What moon phase occurs about 7 days after a full moon?

• new moon

• waning gibbous

• waxing gibbous

• last quarter

Multiple Choice

It will be a full moon on December 23, 2018. About what date will the next full moon occur?

• January 1, 2019

• January 10, 2019

• January 21, 2019

• February 1, 2019