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Science exam Flashcards

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1
Q

Speed depends on how far something travels and
⦁ how steep is its route
⦁ which direction it travels.
⦁ how much time it takes to travel the distance
⦁ Total force of the object

A

how much time it takes to travel the distance

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2
Q 
The boys in the figure below are about to kick the soccer ball in opposite directions. What will be the net force on the ball? In which direction will the ball move?
  cK-12 Foundation CC BY-NC 3.0
⦁	125 N left
⦁	50 N left
⦁	200 N left
⦁	25 N left
A

⦁ 50 N left

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3
Q 
Xander has a skateboard that he rides at Newton’s Skate Park. That’s him doing a jump in the figure ⦁	below. The combined mass of Xander and his skateboard is 60 kg. At the top of his jump, the net force acting on him is 30 Newtons. What is his acceleration at that moment?
 shutterstock.com 
⦁	0.5 m/s2 
⦁	2 m/s2 
⦁	30 m/s2
⦁	1800 m/s2
A

0.5 m/s2

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4
Q

How is Newton’s Cradle an example of Newton’s 3rd Law?
Pixabay
⦁ It demonstrates inertia
⦁ It shows how an object stays in motion until friction slows it down
⦁ Newton designed it to show how deceleration occurs if force and mass remain unchanged
⦁ The force of impact (action) is passed through to next ball (reaction) until the end

A

The force of impact (action) is passed through to next ball (reaction) until the end

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5
Q

⦁ Which forces are acting on a person standing on a subway train that is cruising at a constant velocity? (choose 2)
⦁ Earth’s downward gravitational force
⦁ A horizontal force pushing the person towards the back wall
⦁ The floor’s upward force
⦁ Frictional force of the steel on the rails

A

Earth’s downward gravitational force, The floor’s upward force

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6
Q 
Your parents bought a new car last week.  While riding in the car, it stopped suddenly. What happens to you? (choose 3)
⦁	Brakes stop the car but not you
⦁	Inertia keeps moving the body forward
⦁	Nothing-you stop just like the car
⦁	Your body hits the seatbelt
⦁	Friction slowed down your movement
A

Brakes stop the car but not you
Inertia keeps moving the body forward
Your body hits the seatbelt

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7
Q

The SI unit for distance is the
⦁ Mile c kilogram
⦁ Meter d. centiliter

A

Meter

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8
Q

What sports does Coach Bates coach? (choose 3)

⦁ Softball B. Soccer C. Track D. Basketball E. cross country

A

Track, cross country

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9
Q 
What is the average speed of a boat that travels 57 kilometers in 3 hours?
⦁	171 km/h
⦁	60 km/h
⦁	54 km/h
⦁	19 km/h
A

19 km/h

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10
Q 
How far will the boat in question 9 travel if it maintains this speed for 5 hours?
⦁	89 km
⦁	95 km
⦁	114 km
⦁	117 km
A

95 km

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11
Q

If you use an arrow to represent velocity, what does the head of the arrow show?
⦁ speed
⦁ distance
⦁ direction

A

direction

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12
Q

What does Δv/Δt represent?
⦁ speed
⦁ velocity
⦁ acceleration

A

acceleration

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13
Q 
Which of the following is the best definition of deceleration?
⦁	zero acceleration
⦁	constant acceleration
⦁	changing acceleration
⦁	negative acceleration
A

negative acceleration

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14
Q 
Acceleration always involves a change in
⦁	speed.
⦁	velocity.
⦁	direction.
⦁	all of the above
A

all of the above

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15
Q

Very short distances should be measured in a. km b. cm

A

cm

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16
Q

What is a push or a pull? A. motion b. gravity c. force d. speed

A

Force

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17
Q

Liquids should be measured in a ___ and in ___ units.

⦁ Beaker, mm b. cups, grams c. graduated cylinder, mL

A

c. graduated cylinder, mL

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18
Q 
What is the net force acting on the object pictured below?  
⦁	7 N to the right
⦁	7 N to the left
⦁	2 N to the right
⦁	3 N to the left
A

3 N to the left

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19
Q

If two forces act on an object in the same direction
⦁ the net force is greater than either of the two forces.
⦁ the net force equals the sum of the two forces.
⦁ the two forces are always balanced.

A

the net force equals the sum of the two forces.

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20
Q

The force of gravity acting on an object is measured by ______
⦁ weight b. mass c. volume

A

weight

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21
Q

Examples of forces include friction, gravity, and velocity.

⦁ True b. false

A

false

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22
Q

Equal but opposite forces pushing on the same object produce a net force of __ on the object.
⦁ 0 b. 1 c. 5

A

0

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23
Q

An independent variable is the variable that
⦁ never changes
⦁ I change
⦁ Is changed by the experiment

A

I change

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24
Q

Force can cause a moving object to stop moving. A. True B. False

A

true

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25
Q 
Ms. Dowd and Coach Bates were laughing at Mrs. Christianson’s joke.  Coach Bates’ laugh was much louder due to
⦁	Increased diffraction
⦁	Increased frequency
⦁	Increased amplitude
⦁	Increased wavelength
⦁	A bigger mouth
A

Increased amplitude

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26
Q

Why does engine oil help prevent an engine from overheating?
⦁ It causes chemical reactions that absorb energy.
⦁ It reduces friction between moving parts.
⦁ It has a higher melting point than metal.
⦁ It makes the engine run more slowly.

A

It reduces friction between moving parts.

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27
Q

What is always required to overcome inertia?
⦁ force of friction
⦁ force of gravity
⦁ unbalanced force

A

unbalanced force

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28
Q 
An object at rest will stay at rest as long as the net force acting on it is
⦁	positive.
⦁	strong.
⦁	stable.
⦁	zeor
A

zero

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29
Q 
Inertia causes a moving object to
⦁	keep moving.
⦁	stop moving.
⦁	slow down.
⦁	speed up.
A

keep moving.

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30
Q

If you know an object’s mass, you also know its weight because mass and weight measure the same thing.
⦁ True b. false

A

b. false

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31
Q

Newton’s ___ law of motion describes how forces act in pairs (action-reaction)
⦁ 1st b. 2nd c. 3rd

A

c. 3rd

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32
Q

Two examples of non-contact forces are
⦁ Gravity and magnets c, drag and electric
⦁ Spring and friction d. applied and gravitational

A

Gravity and magnets

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33
Q

What is the SI unit for volume of a liquid?

⦁ centimeter b. gram c. milliliter d. ounce

A

. milliliter

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34
Q

The SI unit for measuring mass is

⦁ gram b. pound c. flask d. liter

A

gram

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35
Q

Ms. Petric coaches which sport?

⦁ Track B. Basketball cheer c. Softball

A

B. Basketball cheer

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36
Q

Two examples of contact forces are
⦁ Spring and drag
⦁ Gravitational and friction
⦁ Applied and electric

A

Spring and drag

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37
Q 
Name the piece of lab equipment used to measure the volume of liquids.
⦁	Cup 
⦁	Triple beam balance
⦁	Erlenmeyer flask
⦁	Graduated cylinder
A

Graduated cylinder

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38
Q

A person uses 20 newtons to push a 40 kg lawn mower. Find the acceleration (m/s2 )

A

0.5m/s^2

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39
Q

The dependent variable is the variable that

⦁ Never changes
⦁ I change
⦁ My teacher changes
⦁ Is controlled by the independent variable

A

Is controlled by the independent variable

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40
Q

Two objects are separated by a distance. What will cause the greatest increase in the gravitational attraction between them?

a. Increase the distance and decrease the mass of both objects by 40 kg.
b. Increase the distance and decrease the mass of one of the objects by 40 kg.
c. Decrease the distance and increase the mass of both objects by 40 kg.
d. Decrease the distance and increase the mass of one of the objects by 40 kg.

A

Decrease the distance and increase the mass of one of the objects by 40 kg.

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41
Q

Sound waves are caused by an object

a. sinking. c. being still.
b. vibrating. d. heating up.

A

vibrating

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42
Q

Astronauts can communicate with planet Earth while in space because of
a. light waves b. gravity c. radio waves D. the internet.

A

. radio waves

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43
Q

What is the meniscus?
⦁ When a balance is zeroed before finding the mass
⦁ A coil of wire acting as a magnet
⦁ The bottom curve of liquid where it’s measured

A

The bottom curve of liquid where it’s measured

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44
Q

54.07 mm = _______________ cm

A

5.407cm

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45
Q

9.2 kL = __________________ L

A

9,200

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46
Q

A train slows down as it pulls into the station. Is it accelerating? yes, B. no

A

Yes

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47
Q

A tractor is moving hay bales. Bale A has a mass of 50kg and Bale B has a mass of 75kg. Which of the following is true?
⦁ The same amount of force will be needed to move the bales of hay.
⦁ Less force will be needed to move Bale B since mass and force are inverses.
⦁ More force will be needed to move Bale B since mass and force are proportional.

A

More force will be needed to move Bale B since mass and force are proportional.

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48
Q

A flying hawk will experience __ force.

⦁ drag b. frictional c. magnetic d. sliding

A

drag

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49
Q 
All spectrometers measure…..
⦁	The magnetic fields of all planets
⦁	Wavelength of light spectra
⦁	Surface area of planets
⦁	Orbital velocities of satellites
A

Wavelength of light spectra

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50
Q

The force of gravity on Earth is approximately _______ m/s2

A

9.807

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51
Q

Which waves move across the surface? a. P b. S c. L

A

c. L

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52
Q

Which waves stop at Earth’s core? a. P b. S c. L

A

b. S

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53
Q

Which waves are the most destructive? a. P b. S c. L

A

c. L

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54
Q

This wave moves perpendicular to the wave direction. a. P b. S c. L

A

b. S

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55
Q

Which waves can move through solids, liquids and gases? a. P b. S c. L

A

a. P

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56
Q

When two waves interact creating a smaller amplitude it’s called
⦁ Destructive interference
⦁ Catastrophic conflict
⦁ Constructive interference

A

Destructive interference

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57
Q

Bats can hear at a frequency above _Hz a. 20,000 b. 60,000 c. 90,000 d 120,000

A

c. 90,000 d 120,000

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58
Q

Angle at which a wave strikes the surface (angle in)

⦁ Angle of incidence b. angle of reflection c. angle of refraction

A

Angle of incidence

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59
Q

What causes earthquakes?

⦁ Seismic waves b. collapsing waves c. electromagnetic waves

A

Seismic waves

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60
Q

A sound wave is a. transverse b. longitudinal

A

a. transverse

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61
Q

Which travels faster? a. sound waves b. water waves c. light waves

A

c. light waves

62
Q

What causes a wine glass to shatter? ______________________________________

A

frecency +pitch

63
Q

Bending a wave around an object a. refraction b. diffraction c. reflection

A

b. diffraction

64
Q

When a wave moves from one medium to another and speed changes
⦁ Refraction b. diffraction c. reflection

A

Refraction

65
Q

Greater __ leads to greater sound. a. frequency b. reflection c. amplitude

A

amplitude

66
Q

Which wave type has compressions and rarefactions? a. transverse b. longitudinal

A

longitudinal

67
Q

Why can you NOT hear sounds in space? _____________________________________

A

No matter for it to travel through

68
Q

We can see visible light. Those different wavelengths appear as _____________

A

color

69
Q

Electromagnets are made of magnets and __

⦁ Coils b. batteries c. current passing thru a coil d. iron core

A

c. current passing thru a coil

70
Q

In a hydroelectric power plant, write the steps in order ( 7 steps)

A

dam, reservoir, intake penstock, turbine, generator, transformer, power lines

71
Q 
What is the first step to produce electricity in a Hydroelectric power plant?
⦁	Water flows to the river
⦁	Generators are turned by water 
⦁	Turbines spin
	Reservoir release water to the intake
A

Reservoir release water to the intake

72
Q

Where are the electromagnets used in hydroelectric plants?

⦁ turbines b. penstock c. transformers d. intake valves

A

turbines

73
Q

This moves through water waves. a. water b enrgy c. buoy

A

enery

74
Q

Tsunamis can be caused by
⦁ Volcanoes, landslides, earthquakes
⦁ Hurricanes, meteors, falling icebergs
⦁ Icebergs, earthquakes, volcanoes

A

Volcanoes, landslides, earthquakes

75
Q

A big ship can feel a rogue wave but not a tsunami. a. true b. false

A

false

76
Q

Rogue waves have _ wavelengths that make them steeper. a. short b. long

A

short

77
Q

A wavelength is __ to __.

⦁ Crest – trough b. trough – compression c. crest – crest

A

c. crest – crest

78
Q

The Law of __ states “angle in = angle out”

⦁ Reflection b. refraction c. diffraction

A

Reflection

79
Q

Echoes bounce off __ surfaces

⦁ Smooth b. rough c. soft d. textured

A

Smooth

80
Q

Human hearing can go up to _Hz? a. 120,000 b. 80,000 c. 10,000 d. 20,000

A

d. 20,000

81
Q

Actress and inventor, Hedy Lamarr, advanced communications technology in1940’s leading to the development of
⦁ WiFi, GPS, Bluetooth
⦁ Microwaves, movies
⦁ Radio, credit card scanners

A

WiFi, GPS, Bluetooth

82
Q

What color is the reflection of all light? A. brown b. black c. white d. blue

A

c. white

83
Q

What color is the absorption of all light? A. brown b. black c. white d. blue

A

b. black

84
Q 
Higher frequency has
⦁	Longer wavelength, higher energy
⦁	Longer wavelength, lower energy
⦁	Shorter wavelength, higher energy
⦁	Shorter wavelength, lower energy
A

Shorter wavelength, higher energy

85
Q

List the EMS waves in order from highest to lowest frequency.

A

RADIO, MICROWAVE, INFERAD, VISIBLE, UV,X-RAY,GAMMA

86
Q

Which EMS wave can circle the globe? _____________

A

radio

87
Q

Which EMS can kill germs? ______________

A

UV

88
Q

Which EMS is used in night goggles and thermal imaging? _____________

A

INferd

89
Q

Which EMS is given off when a Supernova explodes? ________________

A

gamma

90
Q

Which EMS is used in cell phones and radar? _________________

A

microwaves

91
Q

Which EMS is used to take pictures of bones and emitted by electrons? _______________

A

x-ray

92
Q

Which EMS can give you a sunburn? ____________________

A

UV

93
Q

Which EMS is from radioactive decay and emits from the nucleus? __________________

A

gamma

94
Q

Which EMS can cause substances to glow and can be seen by some insects/birds? _____

A

UV

95
Q 
Hedy Lamarr’s ingenious technology development of the 40’s was called
⦁	Frequency hopping
⦁	Amplitude adjustment
⦁	Sound skipping
⦁	Resonance rebounding
A

Frequency hopping

96
Q

Every object in the universe attracts every other object. True or False

A

False

97
Q

Distances across the universe are measured in __________________________

A

light years

98
Q

When you go to Mt. Everest, the force on you When you go to Mt. Everest, the force on you a. decreases b. increases b. increases

A

a. decreases

99
Q

On Earth, most observatories and telescopes are located ____________________ because _______________________________________________________________

A

mountains, blocks other radio waves

100
Q 
The Very Large Array in New Mexico consists of 27 telescopes. What type of telescopes that are connected and function as one.
⦁	reflecting
⦁	radio
⦁	refracting
⦁	optical
A

optical

101
Q

After the sun, our next closest star is _________________________ which is _________ light yr away

A

proxima cenanun, 4.22

102
Q

Spring Tides occur during….

⦁ new and full moon b. 1st and 3rd quarter

A

new and full moon

103
Q

When we look at a galaxy or star we are seeing back in _______ at how it used to look because it takes so long for its ___________ to make it here

A

time ,light

104
Q 
The HUBBLE telescope is sending pictures to Earth from 
⦁	The center of the universe
⦁	Earth’s core
⦁	Dr. Blakely’s office
⦁	Dark Matter
⦁	Deep Space
A

Deep Space

105
Q

In Galileo’s time, telescopes were primarily used for _____________________ ____ but he looked up at the sky developing his theory that Earth _________________

A

naval wars, the center of the universe

106
Q

A star’s spectrum can tell us about its

⦁ Temperature b. composition c. distance d. shape e. all

A

e. all

107
Q

The Doppler Effect is about ____ waves and tells how compressed waves have a higher frequency and a __ pitch. A. sound, lower b. sound, higher c. light, fast

A

b. sound, higher

108
Q 
When you listed the top 14 observatories around the world, two were in the US. Name these states.
⦁	Alaska and Georgia
⦁	Vermont and Texas
⦁	Arizona and Hawaii
⦁	South Carolina and Utah
A

Arizona and Hawaii

109
Q

Tides usually occur every ____ hours.

A

6

110
Q

If you are standing at the Dead Sea, you will experience a stronger or weaker pull of gravity?

A

weaker

111
Q

The speed of light is _________________________________ m/s

A

3*10^8

112
Q

All EM radiation is a. visible b. reflective c. light

A

c. light

113
Q

More mass or closer proximity = more _________________ pull

A

gravittantional

114
Q

The Law of Conservation of Energy states that energy can neither be __________ nor ____________________.

A

created or destroyed

115
Q

Dr. Bruce Banner became the Incredible Hulk due to an accident with which EMS wave? _____________________________

A

gamma rays

116
Q

Neap tides are at ______ angle so they do NOT pull with the sun on the ocean
⦁ 45 degree b. 180 degree c. 90 degree

A

c. 90 degree

117
Q

The gas giant planets have many moons due to their ___ creating a ___
⦁ Mass, gravitational pull c. composition, force field
⦁ Weight, force field d. attraction, force field

A

Mass, gravitational pull

118
Q

Coach K’s scooter gets 110km/gal. How far can he go on 2.5 gallons of fuel? _______________

A

275

119
Q

Mrs. Christianson flew from Nashville to LA visit her new grandbaby, a distance of 2240 km. The trip took 4 hours. What was the average speed of the plane? _______________________

A

560

120
Q

Coach L rode his skateboard 200 meters in 30 seconds. Coach Bates rode her unicycle 300 meters in 50 seconds. Who traveled faster(higher speed)? _____________ How much faster? _____________________

A

Coach L, .6 or 2/3

121
Q

During the Slinky Lab, why did the wave not continue to move back and forth?
⦁ Some energy gets lost along the way
⦁ Energy can only travel in one direction
⦁ When waves merge, they stop making energy and change the rest to friction
⦁ Some energy moves into your hand and some changes to friction

A

When waves merge, they stop making energy and change the rest to friction

122
Q

In ‘Scale of the Universe’, a is smaller than a skin cell and b is larger than our sun.
⦁ radio wave or xray
⦁ Polaris or Jupiter

A

x- ray , polaris

123
Q

A recent TED video, The Center of the Universe, stated the big bang wasn’t just an explosion in space but an explosion ____ ____________.

A

of space

124
Q

90 cm = _____________mm
⦁ 4273 g = ____________cg
⦁ 512 m = _____________km
⦁ 88 mL = _____________ L

A

900
427,300
.512
.088

125
Q 
The strength of a magnetic field can  NOT be altered by (choose 1)
⦁	Number of coils of the wire
⦁	Strength of electrical current
⦁	Changing the length of the magnet
⦁	Adding/removing a conductive core
A

Changing the length of the magnet

126
Q

Electromagnets can be turned on/off by turning the current on/off. True False

A

true

127
Q

A __ is a coil of wire acting as a magnet when carrying electric current
⦁ transformer b. insulator c. electromotor d. solenoid e. generator

A

d. solenoid

128
Q

Many common electric devices contain electromagnets—examples are (pick 3)
⦁ Doorbell b. zipper c. garage door d. refrigerator

A

Doorbell, . garage door, d. refrigerator

129
Q

Nikola Tesla lived during a time when most people did not know about
⦁ Electronics c. telescopes
⦁ Radio waves d. electricity

A

radio waves

130
Q

Tesla was the first American to use
⦁ Light bulbs c. a piston engine
⦁ X-rays d. binary code

A

c. a piston engine

131
Q 
Tesla created  (pick 3)   
⦁	neon signs			c. the internet	e. electric coffee maker
⦁	induction motors		d. AC (alternating current)
A

neon signs , d. AC (alternating current) , ⦁ induction motor

132
Q

Tesla’s remote-controlled boat combined with robotics eventually led to
⦁ Christmas lights c. calculators
⦁ Legos d. drones

A

drones

133
Q

Stars are mostly (pick 2)

⦁ Nitrogen b. Helium c. Carbon d. Neon e. Argon f. Hydrogen

A

b. Helium, f. Hydrogen

134
Q

Who observed red shift leading the discovery of the expanding universe?
⦁ Einstein c. Newton e. Hawking
⦁ Hubble d. Tesla

A

⦁ Hubble

135
Q

Which has more?

⦁ Grains of sand on Earth b. stars in the universe

A

b. stars in the universe

136
Q

Gravity is the attraction between
⦁ 2 objects with mass c. Large and small objects
⦁ All objects d. Objects in our solar system

A

2 objects with mass

137
Q

The Sun exerts a force on you of
⦁ 800 N c. 60 N
⦁ 1 N d. 0.5 N

A

d. 0.5 N

138
Q

Are gravitational waves part of EMS?

A

NO

139
Q

Due to Dark Matter, we have constant __ at the edges of the galaxies.
Frequency b. speed c. fluctuations d. decreasing space

A

Frequency

140
Q

how long does it take light from the sun to reach the earth.

A

8.3 min

141
Q

LIGO measures the __ in the fabric of spacetime.

ripples b. distance c. frequency

A

b. distance

142
Q

The is friction in space. TRUE FALSE

A

false

143
Q

The purpose of the Fire Demo at the beginning of school was
Don’t assume c. both a and b
Lab safety d. none of these

A

c. both a and b

144
Q

My dog Scrappy wears a blue collar’ is a ___________________ observation. ‘Scrappy is 75 pounds’ is a _________________________ observation.

A

qualitative

quantitive

145
Q

what is the density of water

A

9.997

146
Q

saltwater density

A

1.03

147
Q

Maglev Trains use superconducting magnets to do what 3 things?
____________________
____________________
____________________

A

levitate
propulsion
guadanice

148
Q

The aurora occurring at the North Pole is called ____________________________

A

norther lights

149
Q

What acts as a bar magnet running through Earth? ________________

A

north and south pole

150
Q

Identify #170-172 as Balanced or Unbalanced Forces.
Two ice skaters move in a straight line at a constant speed.
A sandwich sitting on a plate.
Trucking accelerates around a curve.
Pushing a grocery cart is

A

balanced
balanced
unbalanced
unbalnced

151
Q

pushing a grocery cart is

A

rolling friction

science (7 decks)

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