physical science midterm exam

Physical science midterm exam :D

Im about to kms <3

Multiple Choice

where does the dependant variable go on the graph

• x-axis

• y-axis

• in the title

• in the key

Multiple Choice

a factor in an experiment that changes in response to the independent variable is the

• constant

• control group

• independent variable

• dependent variable

Multiple Choice

Using the graduated cylinder below, pick the accurate and precise measurement

• 22.0 mL

• 20.0mL

• 22 mL

• 20 mL

Multiple Choice

The best type of graph to use to show the percentages of a whole is a

• bar graph

• circle graph

• line graph

• scatter graph

Multiple Choice

a factor that does NOT change in an experiment is the

• constant

• control group

• dependent variable

• independent variable

Multiple Choice

the "cause" of the experiment what are purposefully manipulating or changing is the

• constant

• control group

• dependent variable

• independent variable

Multiple Choice

what is 789000000000 expressed in scientific notation

• 789 x 10^9

• 7.89 x 10^10

• 7.89 x 10^9

• 7.89 x 10^11

Multiple Choice

the speed of light is approximately $$3.0\ x\ 10^8$$ m/s. How would this be written in standard notation?

• 300,000 m/s

• 30,000,000 m/s

• 3.000.000 m/s

• 300,000,000 m/s

Multiple Choice

Mrs.James wants to measure the volume of a liquid very precisely. What is the BEST lab equipment she could use to do this?

• beaker

• test tube

• graduated cylinder

• erlenmeyer flask

Multiple Choice

which of the following is a quantitive observation?

• the dog has two legs

• the dog is small

• the dog is cute

• the dog is fuzzy

Multiple Choice

method for appropriately smelling unknown substances in lab

• law

• theory

• waft

• observation

• inference

Multiple Choice

an explanation of why things or events happen based on knowledge gained from many observations and investigations

• law

• theory

• observation

• inference

• conversion factor

Multiple Choice

subjective; based on opinions or assumptions

• conversion factor

• inference

• observation

• theory

• law

Multiple Choice

ratios of equivalent values

• law

• theory

• conversion factor

• waft

• inference

Multiple Choice

statement about how things happen in nature that seems to be true all the time

• law

• theory

• observation

• waft

• conversion factor

Multiple Choice

Objective; based on the information gathered using the five sense

• law

• theory

• observation

• inference

• waft

Multiple Choice

what is $$1.17\ x\ 10^4$$ in standard notation

• 0.000117

• 11700

• 1170

• 0.00117

Multiple Choice

the speed you read on a speedometer is

• instantaneous speed

• constant speed

• average speed

• velocity

Multiple Choice

3 m/s north is an example

• speed

• velocity

• time

• acceleration

Multiple Choice

a car moves around a wife turn going 45 mi/hr the whole time. The car has a constant

• speed

• velocity

• direction

• acceleration

Multiple Choice

if you ride your bicycle down a straight road for 500 m then turn around and ride back to your starting point, your distance is ___ your displacement.

• greater than

• equal to

• less than

Multiple Choice

motion is the change is

• time

• speed

• velocity

• position

Multiple Choice

an indicator that orients you when describing motion is called the

• time

• speed

• reference point

• point of motion

Multiple Choice

How long will it take an object traveling at 25 m/s to reach a distance of 125 meters

• 5 s

• 5 m

• 0.2 min

• 0.2 s

Multiple Choice

A high-speed train travels with an average speed of 227 km/hr. The train travels for 2hrs. How far does the train travel.

• 113.5 km

• 454 km

• 0.0088

• 225 km

Multiple Choice

A cross-country runner runs 10 km in 40 minutes. What is his average speed?

• 30 km/min

• 4 km/min

• 400 km/min

• 0.25 km/min

Multiple Choice

what does the slide of a distance vs. time graph tell you?

• the total distance traveled

• the speed of the object

• the time it took for the objects to travel

• the acceleration

Multiple Choice

A horizontal (flat) line on a velocity vs. time graph shows __ acceleration

• positive

• negative

• changing

• zero

Multiple Choice

acceleration is rate of change of

• position

• time

• velocity

• speed

Multiple Choice

the graph represents the change in velocity of four cars over a period of 10 hours. Which line represents the car with the greatest acceleration.

• A

• B

• C

• D

Multiple Choice

the horses on a carousel or merry go round are accelerating because

• the speed of the horses is constantly increasing

• the speed of the horses os constantly decreasing

• the direction of the horses' motion is constantly changing

• the travel time is different for every ride

Multiple Choice

find the acceleration of a car that goes from 32 m/s to 96 m/s in 8.0 s

• 8.0 m/ $$s^2$$

• -8.0 m/ $$s^2$$

• 12 m/ $$s^2$$

• 4.0 m/ $$s^2$$

Multiple Choice

what variable is on the Y-axis on this graph

• velocity

• acceleration

• time

• motion

Multiple Choice

in this velocity vs. graph the person at point A

• has zero acceleration

• has positive acceleration

• has negative acceleration

• not enough information to determine

Multiple Choice

In this velocity vs. time graph, the person at point B

• has zero acceleration

• has postive acceleration

• has negative acceleration

• not enough information to determine

Multiple Choice

In this velocity vs. time graph the person at point C

• has zero acceleration

• has postive acceleration

• has negative acceleration

• not enough information to determine

Multiple Choice

at what point is the rate of change of velocity the greatest

• A

• B

• C

• not enough information to determine

Multiple Choice

when a car is traveling at 30 m/s hits the gas pedal, it speeds up to 65 m/s in 3.5 secs. What is the car acceleration during that time?

• 5 m/s^2

• 15 m/s^2

• 10 m/s^2

• 20 m/s^2

Multiple Choice

Which statement about the movement of an object with zero acceleration could be true

• the object is speeding up

• the object is slowing down

• the object is moving at a constant speed

• the object is changing direction

Multiple Choice

A car travels distance a 98 meters in 10 seconds. What is the average speed of the car

• 4.9 m/s

• 49 m/s

• 9.8 m/s

• 98 m/s

Multiple Choice

What does the slope of this graph tell you?

• speed

• acceleration

• time

• distance

Multiple Choice

what time interval has the greatest speed

• 0-1 s

• 1-2 s

• 3-4 s

• 4-6 s

Multiple Choice

what is the instantaneous speed at 5 s

• 30 m/s

• 6 m/s

• 30 mi/hr

• 6 mi/hr

Multiple Choice

What is the average speed of bicyclist ride?

• 45 m/s

• 7.5 m/s

• 45 mi/hr

• 7.5 mi/hr

Multiple Choice

a group of bike riders took a 4 hour trip. During the first 3 hours, they traveled a total of 50 km, but during the last hour they traveled only 10 km. What was the group's average speed for the entire trip?

• 60 km/hr

• 40 km/hr

• 30 km/hr

• 15 km/hr

Multiple Choice

A skateboarder is traveling 12 m/s down a hill. The skateboarded crashed and slid to a stop in 2.0 seconds. What was the rider's acceleration.

• 6 m/s

• 0.17 m/s^2

• -6 m/s^2

• -0.17 m/s^2

Multiple Choice

A group of students is playing tug-of-war. The students both sides of the rope are pulling with equal force so that the rope is not moving. This is an example of

• unbalanced forces

• balanced forces

• acceleration

• displacement

Multiple Choice

A firefighter feels the hose pushing backwards onto him as he used it to put out the fire. What is the most likely cause of this?

• the hose material is very elastic

• since the hose is at rest, it tends to stay at rest

• The force exerted on the water equals the mass of the water times it's acceleration

• The escaping water exerts an equal and opposite force on the hose

Multiple Choice

If the same force is applied to each of the balls pictured below, which has the least acceleration

• ping ball

• tennis ball

• baseball

• bowling ball

Multiple Choice

which of the following is measured in Newtons?

• weight

• momentum

• mass

• acceleration

Multiple Choice

The upward force on an object failing through the air is

• air resistance

• momentum

• inertia

• gravity

Multiple Choice

the relationship among mass, force, and acceleration is explained by

• law of conservation of momentum

• newton's 1st law

• newton's 2nd law

• newton's 3rd law

Multiple Choice

According to Newton's laws, for any object, the greater the force that's applied to it, the it's ___ will be

• acceleration

• inertia

• gravity

• size

Multiple Choice

the size of the gravitational force between two object depends on their

• frictional forces

• inertia

• masses and the distances between them

• speed and direction

Multiple Choice

An astronaut is planning a trip to a newly discovered planet. According to the law of universal gravitation, the astronauts weight on the new planet will be greater than his weight on earth if:

• the new planet has less gravity than earth

• the new planet has the same gravest as earth

• the new planet has more gravity than earth

• the gravity of the planet doesn't matter. Weight is the same everywhere in the universe.

Multiple Choice

"To every action there is an equal and opposite reaction" describes which law?

• Law of conservation of momentum

• Newton's 1st law

• Newton's 2nd law

• Newton's 3rd law

Multiple Choice

Calculate the force on an object that has a mass of 10 kg and an acceleration of 4 m/s^2

• 40 N

• 8 N

• 2.5 N

• 0.4 N

Multiple Choice

A 500N force is applied to a 25 m/s^2 object. The mass of object is

• 12,500 m/s

• 12,500 kg

• 20 m/s

• 20 kg

Multiple Choice

The __ of an object does not change, but its __ can based on its location

• mass, volume

• mass, weight

• weight, mass

• weight, volume

Multiple Choice

when two forces on the same object are equal and opposite, these forces are called __ forces

• net

• balanced

• unbalanced

• frictional

Multiple Choice

what is the acceleration of the box in the picture?

• 7,500 m/s^2

• 300 m/s^2

• 25 m/s^2

• 12 m/s^2

Multiple Choice

what is the weight of the box in the picture

• 25 kg

• 25 N

• 245 kg

• 245 N

Multiple Choice

As the mass of an object increases, its inertia will

• decrease

• increase

• stay the same

• be unable to determine

Multiple Choice

Which two quantities are measured in the same units?

• velocity and acceleration

• weight and force

• mass and weight

• force and mass

Multiple Choice

a student drops a feather and a rock at the same time from Mrs.Taylor's window. If air resistance wasn't a factor, what should she observe?

• the rock falls slower than the feather

• the rock falls faster than the feather

• the rock and feather fell at the same rate

• the rock and feather remain suspended and do not fall

Multiple Choice

a man weighs 800N is standing on a chair. In order to support the man, what force is the chair exerting?

• less than 800 N

• greater than 800 N

• 800 N up

• 800 N down

Multiple Choice

an object that is falling freely has a constant what?

• speed

• velocity

• acceleration

• nothing is constant

Multiple Choice

what is the net force on the block?

• 8 N right

• 8 N left

• 2 N left

• 2 N right

Multiple Choice

which of the following best describes jaw a swimmer moves through water?

• The swimmer pushes backwards on the water and the water pushes with an equal but opposite force back on the swimmer

• the swimmer pushed off the side of the pool and his inertia keeps him moving though the water

• the swimmer uses friction to push himself through the water

• air resistance limits the swimmer's speed

Multiple Choice

In the picture, if the card were quickly pulled off the cup like the finger suggests, what property would explain why the coin falling into the cup rather than moving with the card?

• Friction

• force

• inertia

• air resistance

Multiple Choice

an object will move at a constant velocity unless an unbalanced force acts upon it

• force

• gravity

• air resistance

• inertia

• Newton's 1st law

Multiple Choice

Push or pull one body exerts on another

• force

• newton's 3rd law

• weight

• mass

• momentum

Multiple Choice

a friction-like that opposes the motion objects that move through the air

• inertia

• terminal velocity

• air resistance

• weight

• law of conservation of momentum

Multiple Choice

the highest velocity a falling object will reach

• inertia

• momentum

• mass

• weight

• terminal velocity

Multiple Choice

tendency of an object to resist changes in motion

• force

• gravity

• air resistance

• inertia

• Newton's 1st law

Multiple Choice

the attraction any two objects have on one another

• force

• gravity

• air resistance

• inertia

• weight

Multiple Choice

the force of gravity on an object

• force

• weight

• law of conservation of momentum

• terminal velocity

• inertia

Multiple Choice

A new force acting on an object causes the object to accelerate in the direction of the net force

• Newton's 1st law

• Newtons's 2nd law

• Newton's 3rd law

• weight

Multiple Choice

related to the amount of force needed to change an object's motion

• force

• gravity

• momentum

• weight

• inertia

Multiple Choice

temperature measures the average __ of the particles in a material

• chemical energy

• kinetic energy

• potential energy

• mechanical energy

Multiple Choice

the __ energy of an object increases with its height

• chemical potential

• kinetic

• thermal

• gravitational potential

Multiple Choice

ab object has kinetic energy must be

• lifted above Earth's surface

• in motion

• at rest

• changing direction

Multiple Choice

the law of __ states that energy in a system can change forms but can never be created or destroyed

• conservation of energy

• consecration of energy

• conversion of energy

• construction of energy

Multiple Choice

the kinetic energy of an object increases as its __ increases

• height

• speed

• volume

• potential energy

Multiple Choice

how much force is required to lift a rock a vertical distance of 8 m if 80 j od work were done

• 80 J

• 80 N

• 10 J

• 10 N

Multiple Choice

when a ball is dropped it bounces until it eventually stops . Why does this happen?

• Some of the ball's energy is lost

• Some of the ball's energy is converted to other forms, such as thermal and sound

• all of the balls energy id eventually converted to potential energy when the ball stops bouncing

• all of the ball's energy is eventually converted to kinetic energy when the ball stops bouncing

Multiple Choice

The diagram to the right shows four locations in a temperature field. The temperature of each location is given in degrees Celsius. Heat energy will normally flow from:

• D to A

• C to B

• B to D

• B to C

Multiple Choice

Energy stored in food would be considered

• chemical potential

• kinetic

• thermal

• gravitational

Multiple Choice

conduction is the transfer of heat energy by __

• direct particle contact

• electromagnetic waves

• density differences

• movement through a vacuum

Multiple Choice

an example of an energy conversion from kinetic to thermal energy would be

• friction

• television

• flower

• gravity

Multiple Choice

green plants convert light energy from sun into __ during photosynthesis

• gravitational potential energy

• chemical potential energy

• thermal energy

• mechanical energy

Multiple Choice

a constant force of 2.0 N is used to push a box 4.0 m across the floor. How much work is done?

• 6 J

• 8 J

• 12 J

• 24 J

Multiple Choice

the rate at which work is done is

• power

• force

• efficiency

• momentum

Multiple Choice

a material that resists/limits the flow of heat by conduction, convection and radiation is a(n)

• conductor

• insulator

• radiator

• generator

Multiple Choice

In the diagram to the right, a roller coaster car starts from rest and moves along the track. At which point does the roller coaster car have the greatest potential energy

• A

• B

• C

• D

Multiple Choice

the __ energy of an object depends on both the height and the mass of an object

• radiant

• kinetic

• chemical

• gravitational potential

Multiple Choice

thermal energy is transferred to the solar panel in picture B by

• convection

• conduction

• friction

• radiation

Multiple Choice

which picture shows thermal energy transfer by convection

• A

• B

• C

• D

Multiple Choice

Which pictures show the same type of thermal energy tranfer

• A and C

• A and D

• C and D

• They all show different types of transfer

Multiple Choice

an energy has a velocity of 9 m/s and a mass of 20 kg. What is the kinetic energy of the object

• 90 J

• 180 J

• 810 J

• 1620 J

Multiple Choice

When an object is dropped what happens to potential and kinetic energy as it falls?

• GPE goes up, KE goes down

• GPE goes up, KE goes up

• GPE goes up, KE goes down

• GPE goes down, KE goes up

Multiple Choice

A 5 kg medicine ball is thrown upward at a speed of 2 m/s. How much energy does it have?

• 5 J

• 10 J

• 20 J

• 98 J

Multiple Choice

which ball in the picture has the greatest potential energy

• A

• B

• C

• D

Multiple Choice

what energy change do the appliances in the picture all have in common?

• they convert electrical energy to thermal energy

• they convert electrical to mechanical energy

• they convert mechanical energy to electrical energy

• they convert heat energy to electrical energy

Multiple Choice

what is the potential energy of a 55 kg box that is sitting 8.0 m above the ground?

• 4,312 J

• 1,760 J

• 550 J

• 400 J

Multiple Choice

The picture to the right shows a person swinging a baseball bat, starting at point A. The kinetic energy of that bat would be the greatest at

• Point A

• Point B

• Point C

• Point D

Multiple Choice

which of the following types of energy does not directly result when a rocket is set off using chemical energy?

• potential energy

• sound energy

• radiant energy

• thermal energy

Multiple Choice

which requires more work?

• pushing a box with a force of 115 N a distance of 15 m

• lifting a 20 kg mass a distance of 10 m

Multiple Choice

is work being done when weightlifter holds a 200 Ib weight in his hands?

• no because the object is not moving

• yes because it pushes down on the weightlifter's hand

Multiple Choice

sometimes when you come into class, your chair feels warm. Why does this happen?

• because of the specific heat of the chair

• the chair undergoes convection

• because the heat of the person before it travels into the chair

Multiple Choice

A form of energy that is reflected or emitted from objects in the form of electrical and magnetic waves that can travel through space

• thermal energy

• mechanical energy

• electromagnetic energy

• specific heat

• work

Multiple Choice

plastic is an example of this

• convection

• insulator

• specific heat

• conductor

Multiple Choice

energy in the form of motion

• kinetic energy

• GPE

• thermal energy

• work

Multiple Choice

transfer of energy by the movement of heated particles

• convection

• insulator

• conductor

• work

• specific heat

Multiple Choice

transfer of energy that occurs when force makes an object move

• specific heat

• convection

• insulator

• conductor

• work

Multiple Choice

the total amount of kinetic and potential energy of all atoms in an object

• kinetic energy

• GPE

• thermal energy

• mechanical energy

• work

Multiple Choice

the total amount of kinetic and potential energy in a system

• kinetic energy

• GPE

• thermal energy

• mechanical energy

• conductor

Multiple Choice

material that allows heat to flow easily

• conductor

• work

• specific heat

• kinetic energy

Multiple Choice

amount of heat needed to raise temperature pf 1 kg of a material by 1 oC

• Specific heat

• convection

• insulator

• conductor

• work

Multiple Choice

energy stored by objects that are above earth's surface

• kinetic energy

• GPE

• conductor

• work

Multiple Choice

how many simple machines exist?

• two

• five

• six

• seven

Multiple Choice

which simple machine can help you raise an object

• an inclined plane

• a pulley

• a lever

• all of these

Multiple Choice

which simple machine converts a downward force into a horizontal force which is useful in splitting an object into two parts?

• an inclined plane

• a wedge

• a pulley

• a screw

Multiple Choice

which simple machine helps connect objects together?

• a wedge

• a screw

• a lever

• a pulley

Multiple Choice

what do you call the pivot point on a lever

• the input force

• the output force

• the fulcrum

• the angle

Multiple Choice

what is a compound machine

• a type of simple machine

• a machine that is made of two or more simple machines

• a machine that makes it easier to perform work, but is not a simple machine

• a machine that performs less complex tasks compared to simple machines.