1) Which statement best explains why the sun appears to move across the sky during the day? a) The Earth is closest to the sun in the winter. b) The Earth is revolving around the sun. c) The Earth is tilted at 23.5 degrees. d) The Earth is rotating on its axis. 2) A student places objects in a bucket of water to determine if they will float. Which set of items is less dense than water? a) Plastic paper clip, penny, and cork b) Toothpick, metal spoon, and plastic paper clip c) Metal spoon, vegetable oil, and penny d) Toothpick, cork, and vegetable oil 3) Which role do the grasses have in the food chain? a) They decompose small organisms to produce energy. b) They prevent the food chain from containing too many carnivores. c) They capture the energy from the sun and are food for consumers. d) They break down dead organisms into simpler substances. 4) A diagram of different sections of land is shown. Which action is most likely happening in Section Y in the diagram? a) Wind and rain compacting rock into larger pieces b) Water carrying rocky material to a new location c) Chemicals in water gluing sediments to each other d) Pressure causing layers of sediment to form over time 5) Students make a solar system model on the playground. The school building represents the sun. They label round objects for each planet. Which planet should they place at the greatest distance from the school building?  a) Jupiter b) Neptune c) Mercury d) Saturn 6) Students observe a gerbil in a cage. Which of these observations is most likely a learned behavior? a) Twitching its whiskers b) Burrowing in the bedding c) Drinking water from a metal tube d) Walking on four legs 7) A student plans to make a chart that describes each process in the water cycle. Which sentence should the student use to describe the process of condensation? a) Water flows downhill. b) Liquid water turns into water vapor. c) Polar ice turns into liquid water. d) Water vapor collects to form droplets. 8) Which observation describes barracudas interacting with the living elements of their ecosystem? a) Barracudas can travel quickly using surface ocean currents. b) Barracudas live around hard structures such as oil rigs and jetties. c) Barracudas are predators of other fish. d) Barracudas tend to live in warm waters. 9) Which process most likely caused the crack in the rock? a) Water freezing and thawing in the rock b) Wind blowing particles against the rock c) Water moving and dropping the rock d) Glaciers scraping over the surface of the rock 10) A student is classifying objects. Answering which question will provide the best evidence that an object is a metal? a) What is its mass? b) What is its physical state? c) Does it conduct thermal energy? d) How quickly does it dissolve in water? 11) A student pours 14 grams of sugar into a jar filled with 500 milliliters of water. The student thoroughly stirs the sugar and water to make a solution. Which change most likely occurs to the sugar when it is added to the water? a) The sugar breaks down to form a new substance in the solution. b) The sugar changes water into a new substance in the solution. c) The sugar floats on the surface of the water in the solution. d) The sugar completely dissolves in the solution. 12) A student is observing part of a plant with a microscope. Which statement describes a behavior of light in the microscope? a) Light travels through the microscope lens without changing direction. b) Moving in straight lines causes light to increase in brightness. c) Light refracts through the lens of the microscope. d) Moving in straight lines keeps light from reflecting. 13) A student lists resources that can be used to produce electricity. Which of the resources are renewable resources? a) Wind, water power b) Wind, coal, and natural gas c) Coal, water power, and petroleum d) Coal, natural gas, water power, and petroleum 14) Butterflies have very long, tubelike tongues. Hummingbirds have very long tongues. Which statement best describes why butterflies and hummingbirds both have long tongues? a) Butterflies and hummingbirds both migrate. b) Butterflies and hummingbirds are attracted to brightly colored flowers. c) Butterflies and hummingbirds eat the same food. d) Butterflies and hummingbirds have the same predators. 15) Which Texas land formation is correctly paired with the force that made the land formation? a) A canyon at Palo Duro Canyon State Park was formed by a river. b) A sand dune at Monahans Sandhills State Park was formed by an earthquake. c) A delta at the end of the Guadalupe River was formed by wind. d) A rock formation with layers on Mustang Island was formed by ice.

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