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PMA 2 Review BI 1, 2, 10, 11, 13 Flashcards | StudBud
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PMA 2 Review BI 1, 2, 10, 11, 13
PMA 2 Review BI 1, 2, 10, 11, 13
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Knowledge & practice of science Types & transfer of energy Forces & motion
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99 cards
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Questions
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Answers
1
Plucking on a tight metal wire causes it to vibrate. What type of energy would that produce?
sound
light
electrical
chemical
2
____ and ___ energy usually come together
light, heat
sound, heat
chemical, wind
mechanical, sound
3
Which kind of observation is more useful in a scientific investigation?
Quantitative (the number of something, like a measurement)
Qualitative (how something looks, like the color)
4
If two different balls are kicked with the same force, which ball will go the farthest?
ball with the smaller diameter
ball with the smaller mass
ball with the greater mass
ball with the greater friction
5
What natural source of energy causes a swimming pool to be warmer in the daytime than at night?
chemical energy
mechanical energy
sound energy
solar energy
6
To test for accuracy, we must
repeat trials
not have a control
change our experiments
only record positive evidence
7
Why do scientists repeat other scientists' experiments?
To check for accuracy
To change results
To show how fun science is
To ask a new question
8
What is an inference?
An educated guess based on your observations
When you gather information using your five senses
9
In order to light the bulb, the circuit must be
Insulated
Open
Closed
Circular
10
When an object has a lot of mass, it creates ____ friction and is ___ to move.
more, easier
more, harder
less, harder
less, easier
11
When is it acceptable to guess or estimate during an experiment?
Never
Always
Rarely
Often
12
Hitting a nail into wood causes the nail to move. What type of energy causes the nail to move?
mechanical energy
light energy
thermal energy
sound energy
13
Most metals conduct ____ and ____ energy
Sound, thermal
Mechanical, sound
Electrical, mechanical
Thermal, electrical
14
Light
bending
when it goes through matter (water, windows, etc.)
Transparent
Absorption
Reflection
Refraction
15
Which of the following is true about thermal (heat) energy?
An object’s temperature is not affected by heat transfer.
Heat always moves from where it is warmer to where it is cooler.
Objects that give off heat always give off light energy.
Heat always moves from where it is cooler to where it is warmer.
16
Which is an observation
The boy likes lobsters
The boy will buy the lobsters
There are 2 lobsters
The boy caught the lobsters
17
LOW pitched sound waves are
Fast
Slow
Far apart
Close together
18
An apple has what type of energy in it?
electrical
chemical
mechanical
thermal
19
Which block would experience the least amount of friction as it moves down the tray?
sandpaper block
sponge block
ice block
plastic block
20
What happens if 2 magnets have N- and N- next to each other?
they will repel
they will attract
they will create gravity
they will create friction
21
Which of the following is
NOT
something energy can do?
change into other forms of energy
cause an object to move
change an object's temperature
be destroyed or used up
22
Why do we sit in the shade on a hot day?
A summer day is usually warmer than a winter day.
Adults heat up more quickly than young children.
Things heat up more quickly in the Sun than in the shade.
Things heat up more slowly in the Sun than in the shade.
23
What force attracts iron objects?
friction
gravity
magnetism
push
24
What causes objects to change their movement?
friction
balanced forces
mass
unbalanced forces
25
Which of the following shows a complete electrical circuit?
A
B
D
C
26
What force causes objects to slow down and come to rest?
magnetism
friction
push
gravity
27
Which question can be investigated?
Which paper towels absorb more water?
Who was the first human?
What is a germ?
Why do ants have 6 legs?
28
How do you make sure a measurement is correct?
ask someone to do it for you
use a calculator
do it multiple times
measure in metric units
29
What type of energy does wood have before it is burned?
electrical
chemical
light
thermal
30
Scientists do science. What is science the study of?
The Earth
The natural world
Elements and chemicals
Plants and animals
31
Observation vs. Inference: Some of the snow on the glacier is powdery
inference
observation
32
The faster something is, it will travel a distance in ___ time
less
more
33
When conducting an investigation, make sure your sources are
friendly
local
popular
reliable
34
Which answer is correct?
slow down and stop
speed up
continue at a constant speed
change direction
35
When you _____, you take in information about the world around you.
communicate
hypothesize
analyze
observe
36
A push moves something away
False
True
37
Why might a box be difficult to push across thefloor?
the box has too little friction
the box doesn’t want to move
the box has too little mass
the box has a lot of mass
38
This is what you compare results to. This stays "normal."
Control
Bibliography
Variable
Method
39
Something can be moving and also be experiencing BALANCED forces
True
False
40
Which force helps a bike stop when brakes are applied?
gravity
friction
heat
momentum
41
These items CONVERT or TRANSFORM _____ energy into other energies
Mechanical
Sound
Thermal
Electrical
42
How do we make sure results are VALID?
Repeat the same steps
Have another scientist check your work
43
What is an example shows
light energy
?
a candle flame
a light switch
a battery
a plant
44
You rub two balloons on a sweater, they both stick to your hair. What happens if you bring them together?
Nothing
They will repel
They will pop
They will attract
45
Why would a scientist replicate someone else's investigation?
to improve the hypothesis
to make sure their findings are correct
46
Which is an observation
The cat will fall
The cat is gray
47
Which is an observation?
They are studying plants
Thre are leaves in the dishes
48
North and south poles of magnets repel each other
False
True
49
Which of the following are
conductors?
Rubber
Wood
Copper
Aluminum
50
Something that can be changed
Hypothesis
Conclusion
Control
Variable
51
Light
bouncing
off a shiny surface
Refraction
Absorption
Reflection
Transmission
52
A thermometer measures _______________ energy.
electrical
light
chemical
thermal
53
In which investigation would it be
better to use a model
than the actual thing?
Does dog drool kill gems?
How do different liquids affect friction?
What would happen if the Earth had no moon?
Do candles burn more quickly in the dark?
54
Energy that travels as a wave through matter is ________________ energy.
potential
sound
chemical
electrical
55
What can you conclude about these two sounds?
Sound 1 is louder.
Sound 1 has a lower pitch.
Sound 2 has a lower pitch.
Sound 2 is louder.
56
What someone thinks or believes
Opinion
Evidence
57
How many cm did the plant grow between day 1 and day 4?
4
10
7.5
15
58
Can you estimate in science investigations? Why or why not?
No, science is based on precision and evidence, not guessing
Yes, estimations are fine in math so they're okay in science
59
Which is an inference
There are 4 shapes
These belong to a teacher
60
Refraction happens when light...
goes in a straight line
is absorbed into a substance
passes through a substance
bounces off a surface
61
A laser pointer is and example of ____________________.
sound energy
mechanical energy
magnetism
light energy
62
Maria wants to make a solar oven by making a box out of one material. Which of the following will get the
hottest
?
Wood
Rubber
Aluminum
Plastic
63
When you move an object, you _____ your energy to that object.
Throw
Transfer
Transform
Make
64
Why do scientists make graphs?
To organize data
To show their predictions
To identify variables
To confirm results
65
What things have in common
Similarities
Differences
66
Which is an inference
The man is looking at the mountains
One man has binoculars
67
What force may keep you from lifting a box upward?
magnetism
friction
push
gravity
68
At which point is the magnetic force the strongest?
1
3
2
4
69
Which is an inference
The lobsters are red
The boy has a white shirt
The boy has gloves on
The boy works at the store
70
In order to leave the Earth's surface, a force needs to...
be balanced
overcome gravity
be less than gravity
overcome friction
71
Which of the following are
insulators?
Rubber
Aluminum
Wood
Copper
72
Which is an observation
There are 4 hands
The 4 people are friends
73
What causes an increase in speed?
greater force
greater mass
greater incline
greater friction
74
What type of energy does a moving flag have?
chemical
potential
mechanical
thermal
75
Why would the flag stay in place if 2 teams were pulling in opposite directions at tug-o-war?
A. The team on the left has greater force
A. There is too much friction
A. The forces are balanced
A. The force of gravity it too great
76
We can use mechanical energy to make thermal energy through
resistance
friction
aluminum
electric shock
77
What type of energy is stored in batteries?
electrical
thermal
chemical
mechanical
78
A procedure that is carried out to observe, study, or test something to learn more about it
Experiment
Procedure
Variable
Investigation
79
The study of the natural world
Astronomy
Lifeology
Science
Biology
80
A control helps show what changed in an investigation
True
False
81
How can you tell if a TV is on or off without playing anything on it?
Feel for chemical energy.
Ask your uncle.
Create mechanical energy.
Look for light energy.
82
Why should all parts of an investigation be recorded?
So it can be replicated
So your hand hurts from writing
So you know what you're doing
Just 'cause
83
What should you do with data after you've collected it?
Fix the problem
Keep it to yourself
Share it
Test something else
84
Friction speeds things up and makes it easier to move
False
True
85
Why do scientists complete several trials of their experiment before they analyze the results?
To prove that their hypothesis is correct
To prove that they’re the best
To collect evidence to support their claim
To show that they did the experiment correctly
86
Why is it important for scientists to record their experimental procedures?
So people can use the data to make decisions
So others can repeat the exact same experiment and compare
So their experiement can be changed to get different results
So they can show they are serious about their work
87
All of the following are ways to conduct scientific investigations EXCEPT
using a model
expressing an opinion
experiements
repeated observations
88
Why do wheels make an object easier to move?
less friction
less density
less mass
less gravity
89
Which of the following is an observation?
The moon creates its own light
Do plants need fertilizer?
Dogs like to be walked
The floor is white tile
90
Why do we need to repeat investigations multiple times?
To verify results
To follow the rules
To test someone else's results
To find a new conclusion
91
Facts that can be used to support statements
Opinion
Evidence
92
According to the picture, which of these is an inference rather than an observation?
This animal has two ears.
This animal is sticking out its tongue.
This animal has hair.
This animal if friendly.
93
Sound energy
mostly
depends on which other type of energy?
mechanical energy
potential energy
chemical energy
electrical energy
94
Information that is collected, usually using tools or 5 senses
Observations
Variables
Experiments
Opinions
95
Which conclusion is supported by the graph?
the rate of erosion was greater between years 4 and 5
erosion increased by 1 meter every year
erosion will stop after 5 years
the least amount of erosion took place between years 3 and 4
96
What
can
light energy travel through that sound energy
cannot
?
clear glass
hot gas
empty space
pure water
97
What form(s) of energy cook food in a solar cooker?
light & thermal
chemical & physical
sound & heat
electrical & mechanical
98
Wind is moving air that has _____ energy
potential
chemical
mechanical
thermal
99
HIGH pitched sound waves are
Close together
Far apart
Fast
Slow
