Post assessments Flashcards
1
Q
What is a controlled experiment?
A
An observer test a hypothesis by looking for changes brought on by alterations to a variable
2
Q
What is an independent variable
A
A variable you intentionally change
3
Q
What is a Dependent variable
A
The difference between the two parts of the experiment that happens when the independent variable is changed
4
Q
What is a Hypothesis?
A
A possible solution to a problem based on knowledge and research
5
Q
What is a controlled variable
A
The variables that are kept the same
6
Q
What is a conclusion
A
The summary of the experiments results and how those results match up to your hypothesis
7
Q
What is a scientific law
A
Statement based on repeated experimental observations that describes some aspects of the universe
8
Q
What is a scientific theory
A
A wealth of steamed explanation of some aspect of the natural world that’s aquired through the scientific method
9
Q
What is an observation
A
A record of information gathered by sentences
10
Q
What is an inference
A
What a scientist thinks the observation means
11
Q
What is a line graph
A
A graph that shows relationships between two or more measured variables
12
Q
What is a histogram
A
A graph that shows the frequency of one measured variable
13
Q
What is mass
A
The amount of matter in an object
14
Q
What is volume
A
The amount of space an object takes up
15
Q
What is a graduated cylinder
A
A tool used to find the volume of a liquid or gas
16
Q
What is a balance
A
A tool used to find mass
17
Q
What type of behavior is expected in the lab
A
No horseplay
18
Q
What kind of clothing do you wear in the lab
A
Remove or secure loose garments remove dangling jewelry tieback longhair no open shoes wear goggles
19
Q
What safety procedures to use when heating objects
A
Allow object to cool before touching it always turn off hot plates immediately after use
20
Q
What is the rule on food and lab
A
Not allowed
21
Q
What do you do with broken glass
A
Do not handle broken glass with bare hands dispose of glass in designated glass disposal container
22
Q
What do you use to measure length
A
Meter stick or ruler
23
Q
How do you measure the volume of a liquid
A
Graduated cylinder
24
Q
How do you measure the volume of an irregular solid
A
Water displacement in a graduated cylinder
25
How did you find the volume of a regular solid
Meter stick or ruler base times width times height
26
How do you find the mass of a solid
A balance
27
How do you find the mass of a liquid
a balance
28
How do you find the weight of an object
A scale
29
How do you measure the volume of a liquid
Graduated cylinder
30
How do you measure the volume of an irregular solid
Water displacement in a graduated cylinder
31
How did you find the volume of a regular solid
Meter stick or ruler base times width times height
32
How do you find the mass of a solid
A balance
33
How do you find the mass of a liquid
a balance
34
How do you find the weight of an object
A scale
35
How do you find the temperature of a substance
Thermometer
36
What information is needed for a graph (7)
```
Title
Scale/increments
Variable measurement and units
Horizontal axis
Vertical axis
Legend/key
Interpolation/extrapolation
```
37
Is the vertical axis X or y, and what variable is on it?
Y axis, dependent variable
38
Is the horizontal axis X or y, and what variable is on it?
Y axis, independent
39
What is interpolation?
When a scientist use a graph to predict results beyond the limits of the experience.
40
What is extrapolation?
When a scientist predicts results between 2 measured points.
41
State the law of conservation of energy.
Energy cannot be created or destroyed.
42
Give an example of mass before = mass after
10g + 10g = 20g
43
What is a frame of reference
A system of objects, relative motion is movement in relation to a frame of reference
44
What is an origin
Start point
45
What is a vector?
A measurement that includes both magnitude and direction.
46
What is a scalar
A measurement that has a numerical value alone
47
What are three examples of a scalar?
Time, distance, and mass
48
What is distance?
Amount of space or length between points
49
What is displacement
Difference between end point and start point.
50
What is the formula for speed?
S=D/T
51
What is velocity?
A change in position over a time interval.
52
What is acceleration?
Change in velocity over time.
53
Start point - 5 m
End point - 10 m
What is the displacement?
5 meters
54
When dealing with the slop of position time graph, what do you see?
Average velocity
55
When dealing with the slope of a velocity time graph, what do you see?
Average acceleration
56
What is a force
A push or a pull
57
What is net force?
Resultant of all forces that act on an object
58
What is applied force?
Push or pull by an outside agent
59
What is friction force?
Force that opposes motion
60
What is normal force
Support force that acts perpendicular to a surface.
61
What is gravitational force?
An attraction between any two objects
62
What is spring force?
Restorative force due to a spring or other elastic force.
63
What is mass?
Measurement of inertia
64
What is inertia?
Property of an object that measures it's resistance to changes in motion
65
What is weight
Downward force due to the attraction between the object and a planet
66
What is momentum?
The product of an objects mass and velocity
67
How is mass a measurement of inertia?
Heavier object will resist motion more than lighter objects.
68
A meteoroid in space moves with a constant velocity of 5 m/s in a straight line. Is this force balanced or unbalanced?
Balanced
69
A paper football came to a stop on a smooth table. Is this force balanced or unbalanced?
Unbalanced.
70
Two cars started from the same position on the floor and reached the wall at the same time. The red car had a mass of 5 kg, while the blue car had a mass of 7 kg. Which car had the most force applied to it?
Blue car
71
What is the formula that applies to Newton's second law?
Force = Mass x Acceleration
72
What is an intensive property?
If a substance is the same substance, it will always have the same characteristic.
73
What is a characteristic property?
A physical property
74
What is density? (Formula)
Density = mass \ volume
75
An object has a density of 6g, water has a density of .2g, will the object sink or float?
Sink
76
What is a solid?
A state of matter with a Definite shape and volume
77
What is a liquid?
A state of matter with an Indefinite shape, definite volume
78
What is a gas?
A state of matter with an indefinite shape and matter.
79
What is plasma?
A state of matter that exist at extremely high temperatures, atoms have been stripped of electrons.
80
What is melting?
When a substance goes from solid to liquid
81
What is freezing?
When a substance goes from liquid to solid
82
What is boiling?
When a substance goes from liquid to gas
83
What is condensing?
When a substance goes from gas to liquid
84
What is deposition?
When a substance goes from gas to solid.
85
What is sublimation?
When a substance goes from a solid to gas.
86
What is heat?
Measurement of the transfer of energy between substances at different temperatures.
87
What is temperature?
Measurement of how hot or cold a substance is
88
What is thermal energy
Total kinetic energy and potential energy in a substance
89
What is specific heat?
Property of a substance that describes how much heat is absorbed or released to change 1 gram by 1 degrees C
90
What is conduction?
Energy moves because particle collision, touching
91
What is convection?
End grey moves becuase of density differences. Less dense rises, more dense sink.
92
What is radiation?
Photons of energy move through waves
93
What is an insulator.
Anything that makes transfer of energy difficult
94
What happens to the temperature within a state of matter?
It changes
95
What happens to temperature within a change of state?
It stays the same
96
What changes during a change of state?
Force
97
What do molecules look like in a solid
Vibrate in fixed positions
98
What do molecules look like in a liquid
Slid past eachother
99
What do molecules look like in a gas?
Move quickly
100
In the calorimetry formula what do the letters Q, M, C, and triangle T mean?
Q = amount of heat
M = mass
C = specific heat
Triangle T = temp change
101
How does heat flow?
From a warmer substance to a cooler substance
102
What affects the amount of thermal energy?
Temperature and the amount of substance
103
What is energy?
The ability to do work
104
What is work?
Force x change in distance
105
What is power?
Work\ time
106
What is kinetic energy?
The energy of a moving object
107
What is potential energy
The energy stored in an object at rest
108
What is electric energy
Energy that vibrates electrons causing electricity
109
What is radiant/light energy
Type of electromagnetic radiation detected by the eye
110
What is mechanical energy
Sum of potential and kinetic energy
111
What is thermal energy
The total energy of all the moving atoms or molecules in a substance
112
What is gravitational potential energy
Energy stored in an object as the result of its position or height
113
What is elastic potential energy
Potential energy stored as a result of deformation of an elastic object stretching.
114
What is chemical potential energy?
Potential energy that can be absorbed or released during a chemical reaction.
115
What is atomic nuclear energy
The energy which has its Irvin in the bonding forces in the atomic nucleus
116
Jennifer ate an energy bar before she ran a race. How does the energy transfer?
Chemical to mechanical
117
What does the atomic mass consist of?
The number of protons and neutrons
118
Are the amount of electrons the same as the amount of protons?
Yes
119
What is the mass number?
The amount of protons
120
What are valence electrons?
Electrons on the outer energy level
121
What is kinetic theory of matter?
Tiny particles in motion make up all matter
122
What is plasma?
Gas like miscues of charged particles.
123
What are crystals?
Particles arranged in repeating geometric patterns
124
What are solids?
State of matter with definite shape and definite volume.
125
What is an amorphous material?
Solid which is not made of crystals
126
What is steam?
Water vapor
127
What is thermal expansion?
Matter expands when it gets hotter and contracts when it cools
128
What is a liquid?
State of matter with no definite shape but with definite volume
129
What is gas?
State of matter that has no definite shape or volume
130
What is ice?
Water in the solid state.
