Worksheets2019 STAAR TEST PLUS EXTRAS
Total questions: 50
Worksheet time: 34mins
The chart lists organisms in five different categories living near the Texas Gulf Coast
Based on the chart, which food chain best models a flow of energy in this ecosystem?
Sun => Mosquitoes => Shrimp => Coyotes
Sun => Algae => Shrimp => Red Drum
Sun => Sunfish => Shrimp => Wood Ducks
Sun => Willow Oaks => Algae => River Otters
A teacher asks students to make a model of a transform plate boundary. The students use blocks to represent tectonic plates and slide the blocks past each other in the directions of the arrows as shown.
Which event can the students best demonstrate with their model?
Earthquake
Volcano
Rift Valley
Mountain
Which statement best describes evidence that a chemical reaction occurs as a cake bakes?
The water in the cake batter evaporates.
The cake rises as gas bubbles form in the baking cake.
The cake takes the shape of the container in which it is baked
The water in the cake batter is used to keep the cake moist as it bakes.
The net force on a vehicle that is accelerating at a rate of 1.5 m/s2 is 1,800 newtons. What is the mass of the vehicle to the nearest kilogram? Record your answer and fill in the bubbles on your answer document. Be sure to use the correct place value.
Wild hogs introduced to Texas from Europe became feral after the hogs escaped from the ranches where they lived. Feral hogs are omnivores that feed on native plants, crops, and small animals. Feral hogs can damage an ecosystem by rooting through the soil to look for food and trampling small plants.
Which types of native organisms do feral hogs most likely compete with for food sources?
Carnivores and producers
Herbivores and carnivores
Producers and decomposers
Decomposers and herbivores
A demonstration helps students understand a principle of roller coaster design
Which answer choice correctly describes the ball’s kinetic and potential energy?
The ball has more potential energy at position X than at position Z
The ball has more kinetic energy at position Y than at position W.
The potential energy and kinetic energy of the ball are equal at position X.
The potential energy and kinetic energy of the ball are greatest at position Z
The mass of an unidentified rock is 15.5 grams. Students determine the volume of the rock by placing the rock in a cylinder with water. The students calculate the density of the rock. They determine the identity of the rock based on the density ranges in the table.
The students most likely have which type of rock?
Density= Mass / Volume
Coal
Dolomite
Peridotite
Sandstone
Sodium and lithium have similar chemical properties. What characteristic of these elements explains why they are chemically similar?
Their atoms both have one valence electron.
Their atoms both have more neutrons than protons.
Their atoms have the same number of energy levels.
Their atoms contain equal numbers of protons and electrons
A student was given this partial dichotomous key and asked to determine in which of five orders the adult insect shown belongs.
Based on the dichotomous key, in which order does the insect belong?
Diptera
Isoptera
Ephemeroptera
Zoraptera
The diagram shows a model of an atom. The model contains three different subatomic particles. Particles X and Y are inside the nucleus, and particle Z is outside of the nucleus.
Which statements best describe the charges on the particles in this model?
Both particles X and Y have a positive charge. Particle Z has a negative charge
Both particles X and Y have a negative charge. Particle Z has a positive charge.
Either particle X or particle Y has a positive charge. Particle Z has a negative charge.
Either particle X or particle Y has a negative charge. Particle Z has a positive charge.
A photograph of a bird perched on a fence post is shown.
Which description best identifies the action-reaction pair between the bird and the fence post?
Action: The force of the bird on the wires
Reaction: The force of the wires on the fence post
Action: The force of the wires on the fence post
Reaction: The force of the fence post on the bird
Action: The force of the fence post on the bird
Reaction: The force of the bird on the wires
Action: The force of the bird on the fence post
Reaction: The force of the fence post on the bird
Buffelgrass is an invasive species of grass from Africa that outcompetes native Texas grasses for space and water.
Which long-term change to a Texas grassland would most likely occur due to the introduction of buffelgrass?
The population of native grasses will increase.
The population of native grasses will decrease.
Buffelgrass offspring will develop traits like those of native grasses.
Buffelgrass offspring will develop traits like those of other invasive species.
Two students record the distance they each traveled in 60 seconds in the data table shown.
If the students continue at the same speed, which statement describes the total distance traveled after 90 seconds?
Student 1 traveled 40 m, and student 2 traveled 20 m.
Student 1 traveled 50 m, and student 2 traveled 30 m.
Student 1 traveled 60 m, and student 2 traveled 30 m
Student 1 traveled 70 m, and student 2 traveled 25 m
A Hertzsprung-Russell (H-R) diagram is shown.
A star that has a luminosity of 10-2 and a temperature of 20,000 K is most likely a —
Main sequence
White dwarf
Blue giant
Red giant
A sledgehammer has a mass of 3.5 kilograms. What net force, to the nearest whole newton, will a person need to apply to accelerate the sledgehammer at a rate of 4.0 m/s2?
Record your answer and fill in the bubbles on your answer document. Be sure to use the correct place value.
USE F=MA to solve this
Students collected data on five elements. Their data are shown in the table.
Which element has the same number of energy levels as lithium?
Beryllium
Sodium
Magnesium
Potassium
Oxygen and oxygen-containing compounds are involved in many different reactions. Which balanced equation represents a reaction that involves 14 atoms of oxygen?
NH4Cl + KOH → NH3 + H2O + KCl
2Na + 2H2 O → 2NaOH + H2
2C2H 6 + 7O2 →
4CO2 + 6H2 O
4Fe + 3O2 → 2Fe2O3
Two plant species that grow in the same area are shown.
Which statement best explains a difference between Plant 1 and Plant 2?
Plant 1 obtains more water from the soil because of its root surface area and root depth.
Plant 1 obtains more sunlight because of its root surface area and root depth.
Plant 2 obtains more water from the soil because of its root surface area and root depth.
Plant 2 obtains more sunlight because of its root surface area and root depth
A Texas Gulf Coast energy pyramid is shown with representative organisms at each trophic level.
Which statement best describes the flow of energy through this pyramid?
The trophic level represented by catfish and gobies receives energy directly from the producers.
The trophic level represented by shrimp and copepods receives energy directly from the tertiary consumers.
The trophic level represented by redfish and flounder receives energy directly from the secondary consumers.
The trophic level represented by wire grass and phytoplankton receives energy directly from the primary consumers.
Which of these observations is an indication that a chemical reaction has occurred?
Steam forms above boiling water
Steam forms above boiling water
A solid forms when two clear solutions are mixed.
Sugar crystals form on the sides of a boiling pot of sugar water
Which statement best explains why the sun appears brighter to people on Earth than any other star?
Sunlight reaches Earth’s atmosphere at an angle that causes the sun’s light rays to intensify.
Unique chemical reactions in the sun’s core produce a high-energy wavelength of light.
The sun burns at a higher temperature than any other star.
The sun is closer to Earth than any other star.
The diagram shows how a cylinder in a car engine causes the car to move.
Which description of the energy conversions in this process is correct?
The chemical energy in the fuel-air mixture is converted to thermal energy, which is then converted to mechanical energy.
The mechanical energy in the fuel-air mixture is converted to electrical energy, which is then converted to thermal energy.
The electrical energy in the fuel-air mixture is converted to mechanical energy, which is then converted to thermal energy.
The thermal energy in the fuel-air mixture is converted to electrical energy, which is then converted to mechanical energy.
The model shows Earth in four different positions in its orbit around the sun.
Which statement correctly explains which position of Earth represents summer in the United States?
Position 1, because the Western Hemisphere is facing the sun
Position 2, because the Northern Hemisphere tilts toward the sun
Position 3, because Earth is at its closest point to the sun in its orbit
Position 4, because Earth is traveling at its fastest rate in its orbit
Which element has chemical properties that are most similar to the chemical properties of sulfur, S?
Silicon, Si
Chlorine, Cl
Selenium, Se
Phosphorus, P
The speed of an object over time is shown in the graph.
Which table describes the object’s motion?
Humans depend upon food that comes from the ocean. Some human activities negatively impact these food supplies.
Which statement provides the best evidence that human activities contribute to this impact?
Human visitors to coral reef systems break corals growing on rocks.
Humans catch marine fish at a faster rate than the fish are able to reproduce.
Humans raise fish in a hatchery for commercial sale.
Humans construct artificial reefs to attract tourists.
A student prepared diagrams to model atoms of two elements.
Atoms of which two elements are represented by these models?
Oxygen‚ O, and neon, Ne
Fluorine, F, and neon, Ne
Silicon, Si, and phosphorus, P
Beryllium, Be, and boron, B
Four students designed and built air propelled rockets that were launched into the air. Their data are recorded in the table.
Which rocket had the greatest acceleration?
Rocket 1
Rocket 2
Rocket 3
Rocket 4
Sea anemones and clown fish live together in the ocean. Which statement best describes one way sea anemones depend on clown fish for an abiotic factor in an ecosystem?
Clown fish protect sea anemones from predatory fish.
Clown fish decrease competition among sea anemones.
Clown fish consume the remains of organisms paralyzed by sea anemones.
Clown fish move water near sea anemones when dissolved oxygen levels are low.
The picture shows a bicyclist increasing speed while riding down a hill during a bicycle race.
Which statements accurately describe the potential and kinetic energy of this bicyclist?
Kinetic energy increases. Potential energy decreases.
Kinetic energy increases. Potential energy remains constant.
Kinetic energy remains constant. Potential energy decreases.
Kinetic energy remains constant. Potential energy increases.
Trees lose water through transpiration, when water evaporates from leaves. The list describes types of tree leaves that help reduce the amount of transpiration.
Which of these is most likely observed in an area experiencing a long-term drought?
Trees with broad leaves will be more healthy than trees with needlelike leaves.
Trees with leaves that have waxy coverings will be more healthy than trees without wax-covered leaves.
Trees with broad leaves will be more healthy than trees with small, flat leaves.
Trees with leaves without any hairlike structures will be more healthy than trees with leaves covered by hairlike structures.
When a coin is tossed in the air, it travels upward, gradually slows down, momentarily reaches zero speed, then moves back downward with increasing speed.
Which statement best explains this change in the coin’s motion?
The force of gravity causes the coin to change its velocity.
The coin’s inertia decreases on the way up and increases on the way down.
The action-reaction force pair of gravity and the applied force cancel each other.
The coin remains in its state of upward motion until the force of friction acts upon it.
A Texas Gulf Coast food web is shown.
According to this food web, which organisms would the bobcat and diamondback rattlesnake compete for if the mouse population and swamp rabbit population decreased?
Raccoon and sparrow
Raccoon and Eastern cottontail rabbit
Sparrow and seeds
Sparrow and Eastern cottontail rabbit
What is "c" in the picture?
Proton
Electron
Neutron
What is the atomic number of the atom pictured?
***HINT** APEMAN
What is an isotope?
**These items only change the WEIGHT of the element**
You can many of the same element with different numbers of these
What element is represented in this Bohr Model?
APEMAN - count the electrons. that equals the atomic number
Carbon
Hydrogen
Aluminum
Lithium
which 2 elements have the same number of valence electrons?
HINT--- All in the same GROUP all have the same proprties
Mg
Ca
B
He
which 2 elements have the same properties like families(Another name for groups)
Ne
He
Fe
Mg
How many Magnesium are in 10MgCl2?
HINT Small numbers attach to the letter its next to, tell how many there are of that letter. The BIG number MULTIPLIES everything, all the small numbers
Which has longer wavelengths? Just look at the graph.
Radio
Visible
Gamma
X-ray
What is the net force?
ADD All numbers together in the SAME Direction. Like 2 people pushing in the box together
What is the net force? OPPOSITES directions----Just subtract the numbers. Biggest number wins and what direction it is going
Identify if the following equation is unbalanced or balanced.
5C4O8→10C+2C5O20
HINT - --> is like an equal sign. Count how many on each side. To be balanced, there needs to be the same on each side
Unbalanced
Balanced
Match the following
Grass
Producer
Mouse
Primary Consumer
Snake
Secondary Consumer
Hawk
Tertiary Consumer
Which of the following is a secondary consumer: (a)
An atom becomes _________ when it gains electrons.
HINT add the plus and minuses
EXAMPLE---6+ and 4- means the charge is 2+
It s a math equation
Positive
Negative
Neutral
These form when atoms gain or lose electrons:
IF it DOESNT have the same number of pluses and minsues
isotopes
ions
atoms
electrons
