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WorksheetsSTAAR Practice 3
Total questions: 25
Worksheet time: 13mins
An equation for a chemical reaction is shown. NaOH + HCl → NaCl + H₂O Which statement provides evidence that mass is conserved in the reaction?
A) Two new substances are formed in the products.
B) Water is one of the products, but not one of the reactants.
C) Two hydrogen atoms are in the reactants, and two hydrogen atoms are in the products.
D) One chlorine atom pairs with one sodium atom in the products, and one chlorine atom pairs with one hydrogen atom in the reactants.
The chemical formula for methane is CH₄. Which statement describes the atoms present in FOUR molecules of methane?
Four molecules of methane would contain 1 atom of carbon and 4 atoms of hydrogen.
Four molecules of methane would contain 4 atoms of carbon and 1 atom of hydrogen.
Four molecules of methane would contain 4 atoms of carbon and 16 atoms of hydrogen.
Four molecules of methane would contain 16 atoms of carbon and 16 atoms of hydrogen.
Matter can undergo physical or chemical changes. Which of these are examples of physical changes? Select TWO correct answers.
Burning wood
Breaking an egg
Cooking an egg
Freezing a popsicle
Rusting iron
A student bounces a basketball off the gym floor. Which statement correctly describes the action-reaction force pair that causes the ball to bounce?
The gym floor pushes up on the ball as the ball pushes down on the floor with an equal amount of force.
The gym floor pushes up on the ball with a greater amount of force than the ball pushes down on the floor.
The gym floor pushes up on the ball as gravity pulls down on the ball with an equal amount of force.
The gym floor pushes up on the ball with a greater amount of force than gravity pulls down on the ball.
Based on the data table, which cart has the lowest acceleration?
W
X
Y
Z
Which statement BEST explains the correct answer to Part A?
A) The cart will have the lowest acceleration if it has a larger mass and its applied force and friction have the greatest sum.
B) The cart will have the lowest acceleration if it has a smaller mass and its applied force and friction have the greatest sum.
C) The cart will have the lowest acceleration if it has a larger mass and has the least difference between its applied force and friction.
D) The cart will have the lowest acceleration if it has a smaller mass and has the least difference between the applied force and friction.
Which graph represents a baseball player accelerating away from a base located at the origin?
A
B
C
D
The diagram shows two arrows that represent the directions of two forces acting on a 1-kilogram ball. The arrows do not represent amounts of force, they only represent the directions of the two forces. How should the diagram be labeled if the ball is accelerating to the west at a rate of 1 m/s²? Move the correct answer to each box. Not all answers will be used.
12 newtons
10 newtons
8 newtons
7 newtons
5 newtons
The image shows a roller coaster cart moving along a track. Which statement BEST describes the kinetic and potential energies of the cart at Location X compared with the kinetic and potential energies of the cart at Location Y?
The cart has more potential energy and less kinetic energy at Location X than it has at Location Y.
The cart has less potential energy and more kinetic energy at Location X than it has at Location Y.
The cart has the same amounts of potential energy and kinetic energy at Location X as it has at Location Y.
The cart has more potential energy and kinetic energy at Location X than it has at Location Y.
A group of students was conducting an investigation with plants. One group of plants was placed inside a closet. The other group of plants was placed next to a window. After two weeks, the plants next to the window were taller and healthier than the plants in the closet. Which statement BEST explains the difference in plant growth?
The plants next to the window were able to convert more light energy into chemical energy.
The plants next to the window were able to convert more thermal energy into mechanical energy.
The plants next to the window were able to convert more light energy into electrical energy.
How do fossil records support the theory of plate tectonics?
A. Similar fossils are found on the same continent at different time periods.
B. Similar fossils are found on various modern continents.
C. Different fossils are found on the same continent during the same time period.
D. Fossils found along coastal regions of modern continents are unique.
Which statement describes how each land feature MOST LIKELY formed?
The Himalayas formed at convergent boundaries, while the Great Rift Valley formed at divergent boundaries.
The Himalayas and the Great Rift Valley both formed at divergent boundaries.
The Himalayas formed at divergent boundaries, while the Great Rift Valley formed at convergent boundaries.
The Himalayas formed at convergent boundaries, while the Great Rift Valley formed at transform boundaries.
Which statement BEST explains the correct answer to Part A?
A. Tectonic plates are moving away from each other in areas that form both mountains and rift valleys.
B. Tectonic plates are moving away from each other in areas that form mountains, while tectonic plates are moving toward each other in areas that form rift valleys.
C. Tectonic plates are moving toward each other in areas that form mountains, while tectonic plates are sliding past each other in areas that form rift valleys.
D. Tectonic plates are moving toward each other in areas that form mountains, while tectonic plates are moving away from each other in areas that form rift valleys.
The diagram shows different types of tectonic plate boundaries. Which table accurately shows the surface features associated with each tectonic plate boundary?
A) Plate Boundary 1: Volcanoes and oceanic ridges; Plate Boundary 2: Trenches and continental rift valleys.
B) Plate Boundary 1: Oceanic ridges and continental rift valleys; Plate Boundary 2: Trenches and volcanoes.
C) Plate Boundary 1: Continental rift valleys and volcanoes; Plate Boundary 2: Oceanic ridges and trenches.
D) Plate Boundary 1: Trenches and continental rift valleys; Plate Boundary 2: Volcanoes and oceanic ridges.
The diagram shows Earth at different positions as it orbits the sun. What differences between Earth’s Northern and Southern Hemispheres are represented in the diagram, AND what causes these differences? Look at the diagram and read the question carefully. Then enter your answers in the box provided.
The Northern Hemisphere experiences summer while the Southern Hemisphere experiences winter due to the tilt of Earth's axis.
The Northern Hemisphere experiences winter while the Southern Hemisphere experiences summer due to earth's rotation.
Both hemispheres experience the same season at the same time due to Earth's orbit.
The differences are caused by the distance of Earth from the sun.
The diagram shows the alignment of Earth, the moon, and the sun on one day in May 2019. The table shows tide heights for a coastal city on four different days in May 2019. Based on the table, on which date were Earth, the moon, and the sun MOST LIKELY arranged as shown in the diagram?
May 15
May 18
May 22
May 26
On the Edwards Plateau in Texas, shrubs grow in arid areas with relatively thin limestone soils. Although these shrublands may transform into forests, the transformation is very slow and never occurs in some places. The image shows an arid area with shrubs and some trees growing. Which factor MOST LIKELY slows or prevents this ecosystem’s progression from shrublands into forests?
A) Limestone soils stimulate plant growth.
B) Moving water dissolves limestone rocks.
C) Shrubby plants dominate the area.
D) The ecosystem has low rainfall and periodic fires.
Which pair of scenarios correctly identifies examples or characteristics of primary and secondary succession?
A) Primary succession occurs in an area where trees are abundant. Secondary succession occurs after a fire disrupts an ecosystem, and the ecosystem is overtaken by new species.
B) Primary succession commonly includes lichens and mosses as pioneer species. Secondary succession occurs when an ecosystem starts on bare rock, where no other species have lived.
C) Primary succession may occur in an ecosystem destroyed by a hurricane. Secondary succession occurs when new sand dunes are formed.
D) Primary succession can include the process of lava cooling to form rock, which is then broken down to form soil in which plants can grow. Secondary succession occurs on land that was once cleared for farming.
Which activity is most likely to decrease the amount of carbon dioxide being added to the ocean water?
Cutting down rain forests to use the land to farm crops
Constructing homes on farmland rather than on vacant lots in cities
Going to school in cars instead of riding the bus with other students
Using electrically powered devices instead of those powered by fossil fuels
An energy pyramid is shown. Which statement BEST describes the flow of energy through this pyramid?
A) Producers provide energy directly to the organisms in all the trophic levels above them.
B) Primary consumers transfer energy to the trophic level above them and the trophic level below them.
C) Secondary consumers represent the most organisms, and they have the greatest amount of energy in their trophic level.
D) Tertiary consumers do not receive all the energy from the trophic level below them, because some energy is lost to the environment.
A food web is shown. What is the total number of organisms that eat primary consumers?
A) Five
B) Six
C) Seven
D) Eight
Based on the food web, which types of organisms would the grasshopper mouse most likely compete with for food sources?
A) Producers and carnivores
B) Producers and decomposers
C) Herbivores and carnivores
D) Herbivores and decomposers
Which statement BEST explains these differences in color?
A) Each snake population adapted to a different environment over time.
B) Each snake population moved to a different environment to reproduce.
C) Each individual snake changed its color to match its environment.
D) Each individual snake chose the best colors to pass to its offspring.
Which TWO body systems are MOST DIRECTLY responsible for students being able to feel rain on their skin? Identify the body systems AND explain how these systems are responsible for creating a sensation on skin.
Nervous and Integumentary systems
Circulatory and Respiratory systems
Digestive and Excretory systems
Muscular and Skeletal systems
Students listed characteristics of some cells they had studied. Identify the characteristics that are part of the cell theory. Select TWO correct answers.
Have similar structures
Are basic units of life
Help fight diseases
Can only come from other cells
Are able to move freely
