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8th Science STAAR - Part II (8th Grade TEKs) Flashcards | StudBud
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8th Science STAAR - Part II (8th Grade TEKs)
8th Science STAAR - Part II (8th Grade TEKs)
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1
Based on the information provided, which Texas city shown will likely have winds from the east?
Abilene
Tyler
San Antonio
Houston
2
The subscripts in a chemical formula represent the –
atomic mass of the heaviest element in the compound
column on the Periodic Table of the element next to it
number of atoms of the element in front of the subscript
atomic number of the element that follows the subscript
3
What pattern, shown in the map, explains why many ocean currents begin near the Equator?
Cold water sinks near the coasts of the continents.
Earth is rotating fastest at the lower latitudes.
Less evaporation here leads to saltier water.
Water farthest from the poles gets the hottest.
4
We see evidence of plate movement because rocks farther and farther from the ridge, the rocks -
are made up of smaller particles
have higher iron content
become thicker and thicker
are consistently older
5
The represents the relative sizes of all stars in the universe. Which is the size of our Sun?
Z
W
Y
X
6
Which points in the diagram represent the height of tides during the full Moon & new Moon?
X and Y
W and Y
W and X
X and Z
7
According to the graph, between 2 and 4 seconds the ball was -
increasing its speed
remaining at rest
changing its direction
traveling at a constant speed
8
If this trend continues, what will be the nitrogen concentration on the 8th week of this study?
0.17
0.23
0.14
0.22
9
The greatest competition would likely occur, if which organisms were to decrease?
Red oat grass and warthogs
Mongoose and lions
Mice and pangolins
Grasshoppers and impalas
10
Based on the information provided in the table, it can be concluded that –
sodium is the most reactive.
aluminum has the most protons.
phosphorus is the least stable.
bromine is the best conductor.
11
According to The Big Bang Theory, scientists believe that over time, the universe is changing
from rotating to stationary
from more dense to less dense
from very large to very small
from cooler to hotter
12
According to the Hertzsprung-Russell diagram, In comparison to the Sun, Betelgeuse -
is brighter and hotter
is less bright but hotter
is cooler and brighter
is smaller in diameter
13
Trees in a temperate deciduous forest compete for all of the following EXCEPT -
soil
water
shelter
sunlight
14
How many points on Earth, as indicated by the arrows, will be experiencing high ides?
1
4
2
3
15
How much force (newtons) is required to accelerate a 2.55kg toy car at a rate of 6.00 m/s?
9.3
15.3
3.45
8.55
16
What percentage of organisms and populations may adapt to long-term changes caused by humans?
6%
49%
94%
51%
17
Molybdenum has an atomic number of 42. This means that molybdenum –
has a freezing point of 42° Fahrenheit.
can form 42 bonds with other atoms.
contains 42 protons in its nucleus.
belongs to Group 42 on the Periodic Table.
18
Which equation is correctly balanced?
B
D
C
A
19
Which pair of organisms represents a predator/prey relationship?
Tuna & squid
Diatoms & shrimp
Sunfish & lanternfish
Shrimp & copepods
20
How many of the listed observations indicate a new substance was formed?
4
1
3
2
21
The most popular theory of origin of universe among space scientists suggests our universe ...
10 - 20 billion years ago
10 - 20 million years ago
10 - 20 centuries ago
10 - 20 thousand years ago
22
According to the periodic table, which element would have similar properties to Sulfur?
Oxygen
Chlorine
Nitrogen
Flurine
23
Which city shown will most likely experience a drop in pressure over the next few days?
Jacksonville
Portland
Rapid City
Baltimore
24
Southern Hemisphere experiences coldest seasonal weather during what portion of Earth’s orbit?
When the orbital speed of the Earth is the fastest.
When the South Pole tilts away from the Sun.
During the time when both hemispheres have a full moon.
During the time when the Earth passes Jupiter.
25
Two boys pull on opposite ends of a rope with different amounts of force. What's the net force?
10 N right
10 N left
90 N right
90 N left
26
Which labeled location shows the approximate position of the Sun in the Milky Way Galaxy?
X
Z
W
Y
27
Which position indicated by the letters is at an elevation of 475 meters?
Y
Z
X
W
28
Which subatomic particles(s) would be found orbiting around the nucleus?
Electrons only
Neutrons only
Protons and neutrons
Electrons and protons
29
What is the mass of an atom with seven protons, seven neutrons, and eight electrons?
7
8
15
14
30
Which of the tributaries is flowing towards the south?
Tributary 2
Tributary 1
Tributary 4
Tributary 3
31
Theequation could be balanced by adding a number 2 in which location in the diagram below?
D
B
C
A
32
Land near the ocean is expected to experience which of the following effects on its climate?
Less precipitation, especially during spring.
Cooler summers and warmer winters.
Persistent, strong, hot and arid winds.
Constant, large changes in air pressure.
33
In which location on the Periodic Table are the nonmetals found?
Location 1
Location 2
Location 3
Location 4
34
What is the net force of the soccer ball?
17.3
74
16.3
23.7
35
Action that must perform to demonstrate what causes changing appearance of Moon from Earth is -
moving the tennis ball around the flashlight.
moving the flashlight around the basketball.
covering up different amounts of the flashlight.
moving the tennis ball around the basketball.
36
Examine the table provided. Which of the objects is producing the greatest force?
ping-pong ball
soccer ball
marble
tennis ball
37
Which of the following examples shows that a chemical reaction has occurred?
Bleach gets rid of a ketchup stain on a white shirt.
A glass jar shatters into many pieces when dropped.
Sugar placed in sugar water sinks to the bottom.
Teeth chop up an apple slice into smaller pieces.
38
An element’s reactivity and other chemical properties are determined by the number of -
isotopes it has
oxidation states
orbitals in an atom
valence electrons
39
Which measurements are necessary for determining both the speed & velocity of a moving object?
Direction, displacement, and distance
Direction, time, and acceleration
Distance, time, and direction
Distance, direction, and acceleration
40
If soldiers want moonlight for a beach landing, which dates will the Moon provide most light?
A
D
C
B
41
A cars moves at 70 km/hr going south & then turns east going 70 km/hr. Its speed & velocity is
Speed - changing, Velocity - constant
Speed - constant, Velocity - changing
Speed - changing, Velocity - changing
Speed - constant, Velocity - constant
42
Seasonal variations on Earth would significantly change if which of the following were changed?
The speed of rotation of Earth.
The direction of orbit of Earth.
The speed of rotation of the Sun.
The angle of tilt of Earth’s axis.
43
In which portion of the river will the water be flowing fastest?
Between Point 2 and Point 3
Between Point 1 and Point 2
Between Point 3 and Point 4
Between Point 4 and Point 5
