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7th grade year review Flashcards | StudBud
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7th grade year review
7th grade year review
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1
What does pH measure?
the concentration of hydrogen (H+)
the concentration of hydroxide (OH-)
the concentration of water (H2O)
the concentration of pH
2
What is the net force on the box?
20 N
40 N
0 N
400 N
3
final step of scientific method
modeling
theory
results & conclusions
hypothesis
4
witch organ does the circulatory system rely on?
heart
kidney
liver
blood vessels
5
Which of these genotypes is homozygous dominant?
Aa
ee
dD
BB
6
genetics
the study of traits
the study of genes
the study of heredity
the study of DNA
7
Which is a physical change?
Baking a birthday cake
A glass falling and shattering on the floor
Baking soda and vinegar mixing together
Burning a piece of paper
8
which layer is the troposphere?
2
3
1
4
9
Velocity tells you
the speed
the direction
the speed and direction
the magnitude and direction
10
A battery transforms chemical energy to which form of energy?
electrical energy
thermal energy
kinetic energy
potential energy
11
What is the unit of force?
Newton
Joule
Pascal
Kilogram
12
What is the unit of force?
Newton
Kilogram
Pascal
Joule
13
If blue eyes are a recessive trait (b), which genotype does this blue-eyed person have?
bb
Bb
bB
BB
14
Newton's third law states that....
force was discovered by Isaac Newton
Newtons are used to measure width
for every action, there is an equal but opposite reaction
15
What is the net force acting on the object?
5 N
10 N
0 N
-5 N
16
Name this element.
Octagon
Outside
Oxygen
Oxymoron
17
True or False: the moon pulls the Earth with less force than the Earth pulls the moon
True
False
18
A force which changes an object's motion is called:
inertia
a balanced force
accelleration
an unbalanced force
19
Newton's Second Law of Motion
An object's acceleration depends on the forces acting on it
An object at rest stays at rest
Every action has an opposite and equal reaction
20
What is another description of a hypothesis?
a test to investigate an idea or question
an idea which can be tested with data
a question about something observed
using what you know to explain an observation
21
Speed is a measure of...
relative motion and distance
direction and time
motion and frame of reference
distance and time
22
Is this chemical reaction balanced?
No
Yes
23
A force can be described as a?
Push or Pull
Push
Pull
Whack
24
What is the net force acting on the object?
-3 N
13 N
10 N
3 N
25
What organelle uses sugar to make energy? (Also called the powerhouse of the cell)
endoplasmic reticulum
lysosome
golgi body
mitochondria
26
Cold front
air over water
2 cold air masses sandwich a warm front
cold air mass is replacing a warm air mass
Warm air mass replaces cold air mass.
27
Which of the following formulas represents speed?
time/distance
accelleration/time
distance/time
velocity/time
28
What is the net force acting on this box?
10N
0N
15N
5N
29
a trait which helps an organism survive is called _______
adaptation
mutation
speciation
migration
30
What does redox stand for?
reduction-oxidation
reduction-oxidization
re-oxidization
reduce-oxidize
31
Which of these genotypes is homozygous recessive?
ee
BB
dD
Aa
32
What does a virus do in your body?
I dont know
take over the host cells and replicates
helps you with waste
Stays where it is and doesn't move
33
What is the first step to the scientific method?
Hypothesis (a testable statement)
Observation (Ask a question)
Inference (use prior knowledge to figure something out)
Experiment (test hypothesis)
34
Newton's First Law of Motion
An object's acceleration depends on the forces acting on it
An object at rest stays at rest
Every action has an opposite and equal reaction
35
What element makes up most of Earth's atmosphere?
Oxygen
Hydrogen
Argon
Nitrogen
36
define: exothermic reaction?
releases oxygen
a chemical reaction that absorbs energy
releases h2o
a chemical reaction that releases energy through heat or light
37
part of an experiment that changes
observation
variable
trial
hypothesis
38
Anything that has mass and volume is
matter
a substance
hot
energy
39
Which substance is a base?
water
soap
black coffee
hot sauce
40
Scientific knowledge can be proven to be absolute truth
True
False
41
What happens when an acid is added to a base?
a big boom
a chemical reaction producing H2O + heat
nothing
a chemical reaction producing H2O + salt
42
The nucleus of a atom consists of ?
empty space
electrons and neutrons
electrons and protons
protons and neutrons
43
What is a valence electron?
An electron on the outermost ring.
An electron on the innermost ring.
An electron inside the nucleus.
44
An experiment has a control because
its needed as a comparison
everything has to be controlled
experiments cannot be conducted outside
it is the dependent variable
45
What force would need to be added to balance this equation?
7N of force to the left
17N of force to the left
3N of force to the right
10N of force to the right
46
Which of these genotypes is heterozygous?
Aa
BB
cc
DD
47
Name this element.
Helium
Heythere
Hydrogen
Hedrygen
48
An example of a chemical change is
breaking glass
burning fuel
melting butter
chocolate syrup mixed in milk
49
What organelle makes photosynthesis occur in plants?
chlorophyl
central vacuole
chloroplast
golgi body
50
how many valence electrons are in this picture?
15
16
6
5
51
What is an allele?
a section of DNA
a chromosome
an organism
a genetic trait
52
What force opposes motion between touching objects?
gravity
friction
momentum
inertia
53
A pH of 7 is....
Acidic
Neutral
Basic
54
What is a dependent variable?
The variable that reacts to the change
The variable that you change
55
What is a qualitative observation?
an observation that involves describing
an observation that involves a number or measurement
56
What organelle holds the DNA of the cell?
golgi body
cell membrane
nucleus
endoplasmic reticulum
57
Chemical change can be reversed.
False
True
58
Which organ system is this?
skeleton
nervous
muscular
Digestive
59
What is an organelle?
A system of organs which perform a specialized function
A small organ, like the gall bladder
A specialized part of a cell with a special function
A unicellular organism
60
Gravity depends on ________ and ________.
mass and volume
force and distance
mass and distance
size and distance
61
Which organ system is this?
Endocrine
Digestive
Muscular
Central nervous
