RISE Science — Grade 4

A student visiting St. George, Utah, notices that prickly pear cactus plants have thick, fleshy stems covered with a thick waxy outer layer and sharp spines instead of wide green leaves. How do these external structures help the cactus survive in the dry desert environment?

• AThey allow the plant to absorb large amounts of snow during winter storms.
• BThey help the plant store water, reduce water loss, and protect it from animals.
• CThey attract plant-eating animals so the cactus can spread its roots faster.
• DThey keep the cactus shaded so it never needs sunlight to grow.

In the Wasatch Mountains, cottonwood trees grow near streams with broad, flat leaves, while pinyon pine trees growing on dry rocky slopes have narrow, needle-like leaves. What is the main reason for this difference in leaf structure?

• APine needles absorb more sunlight than broad cottonwood leaves.
• BCottonwood leaves help the tree climb up rocks, while pine needles attract birds.
• CNeedle-like leaves reduce water loss in dry soil, while broad leaves maximize sunlight ab…
• DBroad leaves protect cottonwood trees from freezing, while pine needles trap rain undergr…

During a heavy rainstorm on a steep Utah hillside, plants with long, deep taproots stay firmly in place while soil without plants washes away. Which two functions do plant roots perform in this situation?

• AMaking seeds and attracting pollinating insects
• BAbsorbing sunlight and making food for the plant
• CAnchoring the plant in ground and holding soil particles together
• DReleasing oxygen into the air and cooling the soil

A student observes bees visiting bright yellow sego lily flowers in a mountain meadow. The bees collect nectar and carry yellow powder from flower to flower. What internal or external plant process is being supported by these flower structures?

• AWater absorption through root hairs
• BReproduction through pollination
• CGas exchange through leaf stomata
• DEnergy storage inside woody stems

A 4th-grade class places a stalk of celery into a beaker of blue-colored water. After 24 hours, blue lines appear inside the stem and the leaves turn blue at the tips. What internal plant structure does this demonstration model?

• AStomata releasing extra water vapour into the classroom air
• BVascular tissue carrying water and dissolved nutrients upward from roots to leaves
• CChloroplasts absorbing sunlight to manufacture sugar molecules
• DOuter bark protecting the stem from physical damage

Microscopic openings called stomata on the undersides of leaves open during the day and close during hot, dry afternoon hours. Why is closing stomata an important survival response for desert plants like the Utah juniper?

• AIt prevents the plant from losing too much water through evaporation.
• BIt stops animals from eating the leaves during the hottest part of the day.
• CIt allows the plant to absorb extra sunlight directly through its bark.
• DIt speeds up the growth of flowers and fruit.

Dandelion seeds have fluffy parachute-like structures, while cocklebur seeds have tiny curved hooks. How do these different seed structures help plants survive and spread across Utah habitats?

• AThey allow seeds to sink deep into lake mud before sprouting.
• BThey help seeds travel to new growing locations by wind or animal fur.
• CThey store extra water so seeds can grow without soil.
• DThey protect seeds from being eaten by earthworms.

A researcher compares two desert plants in Moab, Utah. Plant A has one thick root growing 15 feet straight down into the ground. Plant B has hundreds of thin roots spreading widely just 2 inches under the surface. Which statement best explains how these root systems compare?

• APlant A reaches deep underground groundwater, while Plant B quickly absorbs light rain sh…
• BPlant A absorbs sunlight from deep soil, while Plant B absorbs air from the surface.
• CPlant A makes flowers underground, while Plant B makes seeds above ground.
• DPlant A stores sugar in its leaves, while Plant B stores water in its flowers.

Students observe that green bean plants placed near a sunny window grow tall and sturdy, while identical plants kept in a dark closet grow pale, weak, and die. What essential process requires light for plant survival?

• AAbsorbing rock minerals through stems
• BPhotosynthesis to produce food energy
• CReleasing seeds into the soil
• DAttracting earthworms to root systems

Wild rose bushes growing along canyon trails in Utah have sharp prickles along their stems. What is the primary function of these external stem structures?

• ATo absorb carbon dioxide directly from mountain air
• BTo prevent plant-eating animals from eating the stems and leaves
• CTo trap falling snow and keep the roots warm in winter
• DTo attract hummingbirds to pollinate the rose blossoms

The black-tailed jackrabbit living in Utah deserts has unusually large ears filled with many tiny blood vessels. How do these large ear structures support the jackrabbit's survival during hot summer days?

• AThey flap like wings to blow cool air over the rabbit's body.
• BThey release excess body heat into the surrounding air to keep the rabbit cool.
• CThey store extra drinking water for long desert journeys.
• DThey trap underground moisture when the rabbit burrows.

Desert bighorn sheep in Zion National Park can leap across narrow canyon ledges and climb near-vertical rock walls without slipping. Which external structure provides this climbing advantage?

• AThick, waterproof fur coats
• BFlexible hooves with soft, rubbery pads and sharp outer edges
• CLong, bushy tails used for waving at other sheep
• DWide, flat teeth for crushing desert shrubs

Utah prairie dogs build complex underground burrow systems with multiple entrances. Which internal and external body structures are most important for constructing these burrows?

• AFeathered wings and hollow bones
• BStrong front legs with sharp, curved claws
• CLong fins and smooth, scaly skin
• DPrehensile tails and sticky foot pads

The snowshoe hare lives in the high mountains of Utah. In summer, its fur is brown, but in autumn, its fur shed and grows back completely white. How does this seasonal fur change support the hare's survival?

• AIt helps the hare absorb extra heat from winter sunlight.
• BIt provides camouflage against snow, hiding the hare from predators like lynx.
• CIt allows the hare to swim faster through frozen mountain lakes.
• DIt alerts other animals that winter food is available.

Great horned owls hunt mice in Utah forests at night. They have large, fixed eyes that gather small amounts of light and facial feather disks that direct faint sounds into their ears. What system works with these sensory organs to help the owl capture prey in the dark?

• AThe digestive system breaking down mouse bones
• BThe brain processing sensory signals to calculate the prey's exact position
• CThe respiratory system pumping air into the owl's feathers
• DThe circulatory system turning light into electrical heat

A trout living in the Provo River has gills on the sides of its head, while a deer grazing along the riverbank has lungs inside its chest. Which statement correctly compares how these internal structures function?

• AGills absorb dissolved oxygen from water, while lungs absorb oxygen from air.
• BGills pump blood through the body, while lungs digest aquatic plants.
• CGills absorb carbon dioxide from air, while lungs release water into rivers.
• DGills help the trout walk on rocks, while lungs help the deer swim underwater.

Students examine pictures of two Utah birds: a golden eagle with a sharp, hooked beak and a broad-tailed hummingbird with a long, slender beak. What can students infer about these birds based on their beak structures?

• ABoth birds eat the same types of mountain insects.
• BThe eagle uses its hook to tear meat, while the hummingbird uses its long beak to reach f…
• CThe eagle uses its hook to scoop water, while the hummingbird uses its beak to dig underg…
• DBeak shapes are random and do not relate to the food birds eat.

Before winter arrives in northern Utah, black bears spend late summer eating large quantities of pine nuts, berries, and fish, gaining up to 30 pounds of body fat per week. How does this fat layer function during hibernation?

• AIt allows the bear to stay awake all winter without breathing.
• BIt acts as stored energy and insulation while the bear sleeps without eating.
• CIt turns into hard bone to protect the bear from cave collapses.
• DIt helps the bear shed its fur so new summer fur can grow.

Rattlesnakes in Utah deserts have specialized sensory openings called 'pits' located between their eyes and nostrils. These pits detect subtle heat changes in their surroundings. How does this sensory structure help the rattlesnake hunt in complete darkness?

• AIt allows the snake to hear the high-pitched squeaks of mice.
• BIt senses infrared thermal energy given off by warm-blooded prey like desert mice.
• CIt shines a beam of light onto the ground to illuminate nocturnal lizards.
• DIt smells food particles floating in the night air.

Vertebrates like cougars and mule deer have an internal skeleton made of bone, while insects like grasshoppers have a hard external exoskeleton. What major function do both types of skeletons provide?

• AProducing light energy for nocturnal navigation
• BProviding structural support for the body and protecting soft internal organs
• CAbsorbing water directly from humid mountain air
• DConverting plant cellulose into electrical impulses

A student walking barefoot along the shore of Bear Lake steps on a sharp rock. Almost instantly, the student pulls their foot back before feeling pain. Which sequence describes how information traveled through the nervous system?

• ABrain -> skin receptors -> foot muscles -> nerve pathway
• BSkin receptors -> sensory nerves -> brain/spinal cord -> motor nerves -> foot muscles
• CFoot muscles -> brain -> skin receptors -> sensory nerves
• DSkin receptors -> stomach -> heart -> foot muscles

A dog sitting in a yard perks up its ears and turns its head toward a distant fence seconds before its owner hears a car pulling into the driveway. Why did the dog respond faster than the human?

• AThe dog's eyes saw the sound waves moving through the air.
• BThe dog's ear structure catches fainter sound vibrations, sending signals to its brain so…
• CThe dog's brain creates sound waves and sends them to the car.
• DThe dog smelled the car's headlights before the sound arrived.

A mule deer grazing in a Utah valley catches the scent of a nearby coyote on the breeze. The deer immediately stops eating, raises its head, and runs toward thick brush. How did the deer's body process this sensory input?

• ANose receptors detected smell chemicals -> signals sent to brain -> brain interpreted dan…
• BLeg muscles smelled the coyote -> signals sent to nose -> deer grew new fur
• CBrain smelled the coyote directly -> stomach digested the scent -> deer fell asleep
• DNose receptors created coyote scent -> eyes turned scent into light -> deer jumped into l…

When a student steps out of a dark movie theater into bright Utah afternoon sunshine, the black pupils in their eyes shrink to tiny dots within seconds. What is the purpose of this automatic eye response?

• ATo stop dust from entering the back of the skull
• BTo restrict the amount of light entering the eye, protecting sensitive light receptors fr…
• CTo change the color of the student's eyes from brown to blue
• DTo allow the student to hear background sounds more clearly

Human eyes contain two main types of light receptor cells in the retina: rods, which detect movement and low light, and cones, which detect colors in bright light. If a person is walking through a dark canyon at night, which receptor cells are active and how does the brain interpret the scene?

• ACones are active, so the brain sees vivid red and green plants.
• BRods are active, so the brain perceives shapes and motion in shades of gray.
• CBoth rods and cones shut off completely, so the brain creates its own light.
• DCones convert sound waves into bright blue flashes inside the brain.

Hikers near the top of the Uinta Mountains in Utah find fossilized sea clam shells embedded in limestone rocks at an elevation of 10,000 feet above sea level. What evidence do these fossils provide about Utah's past environment?

• AAncient sea clams learned to crawl up dry mountain cliffs.
• BThe area where the mountains stand today was once covered by a shallow ocean.
• CPeople carried millions of ocean shells up the mountain for decoration.
• DGlaciers froze sea clams and dropped them onto mountain peaks yesterday.

Geologists studying rock layers in eastern Utah discover fossilized leaves from tropical palm trees and swamp ferns. Today, this area is a cool, dry desert. What can scientists conclude from this fossil data?

• AThe climate in eastern Utah was once much warmer and wetter than it is today.
• BPalm trees used to grow in deep snow and ice.
• CDesert cacti transformed into palm trees when the weather became cold.
• DThe fossil leaves were blown to Utah from South America by strong winds.

Near Moab, Utah, a sandstone rock face shows a series of large, three-toed dinosaur footprint trace fossils preserved in a straight trackway. What information can scientists learn by analyzing these trace fossils?

• AThe exact color of the dinosaur's skin and feathers
• BThe dinosaur's approximate size, stride length, walking speed, and habitat environment
• CWhat the dinosaur sang to attract a mate
• DHow many teeth the dinosaur lost during its lifetime

At Escalante Petrified Forest State Park, visitors see heavy stone logs lying on dry ground. Microscopic analysis shows that mineral-rich groundwater replaced the original wood cells over millions of years. What type of fossilization process created this petrified wood?

• AFreezing in mountain ice sheets
• BPermineralization (petrifaction) where minerals replace organic material
• CDrying out in hot desert sunlight without changing
• DCarbon film stamping from leaf pressure

A 4th-grade student compares three fossils found in different rock layers in Millard County, Utah: Layer 1 (bottom) contains trilobites, Layer 2 (middle) contains ancient fish, and Layer 3 (top) contains primitive land plants. What can the student infer about the age and environment of these layers?

• ALayer 3 is the oldest, proving the area started as dry land.
• BLayer 1 is the oldest and represents an ancient ocean, while Layer 3 is younger and repre…
• CAll three layers formed during the exact same year during a sandstorm.
• DLayer 2 is older than Layer 1, showing that fish evolved before trilobites.

During cold winter nights in the Wasatch Mountains, liquid water seeps into tiny cracks in granite rocks. When the water freezes into ice, it expands, making the cracks wider. Over time, the rocks break apart into smaller pieces. What process is being described?

• AVolcanic eruption
• BIce wedging (physical weathering)
• CRiver erosion
• DWind deposition

In Arches National Park, sand grains blown by strong desert winds repeatedly hit sandstone fins, slowly wearing away softer rock until natural stone arches form. Which two Earth processes work together to shape these arches?

• AWeathering (abrasion breaking rock) and erosion (wind carrying sand away)
• BEarthquakes breaking rock and rivers building deltas
• CGlaciers melting and volcanoes depositing lava
• DPlant roots dissolving rock and rain freezing underground

A student notices a pine tree growing out of a crack in a large boulder. Over several years, as the tree grows thicker, the crack in the boulder widens until the rock splits in two. How did the plant cause mechanical weathering?

• AThe tree leaves absorbed all the oxygen from the rock.
• BThe growing tree roots exerted outward mechanical pressure inside the crack.
• CThe tree bark converted rock into soft mud.
• DThe tree dropped hot seeds that melted the boulder.

Deep inside Mount Timpanogos in Utah, rainwater absorbing carbon dioxide from soil becomes slightly acidic. As this groundwater trickles through underground limestone layers, it slowly dissolves the rock, forming giant cave chambers. What type of weathering is occurring?

• APhysical abrasion weathering
• BChemical weathering by dissolving limestone
• CGlacial carving weathering
• DWind erosion deposition

After a sudden summer thunderstorm in Bryce Canyon, reddish muddy water rushes down steep canyon gullies. The water carries sand, gravel, and mud down into the valley below. What Earth process is moving the soil and rock particles?

• AWeathering
• BErosion
• CEvaporation
• DCondensation

At the base of steep canyon cliffs in Zion National Park, large piles of loose, jagged boulders collect in sloping mounds called talus slopes. What force is primarily responsible for pulling these weathered rocks down the cliff face?

• AMagnetism
• BGravity
• CSunlight
• DAir pressure

A class visits the sandy shores of the Great Salt Lake. The teacher explains that millions of years ago, quartz rocks in nearby mountains were broken down into small grains, moved by streams, and dropped along the lake shore. What is the correct order of the three Earth processes that formed the beach sand?

• AErosion -> Deposition -> Weathering
• BDeposition -> Weathering -> Erosion
• CWeathering -> Erosion -> Deposition
• DWeathering -> Deposition -> Erosion

Which of the following scenarios is the best example of deposition forming a new landform?

• AWind blowing sand off a mountain ridge
• BA river dropping silt and mud at its mouth to form a flat delta
• CIce expanding inside a rock crack until the rock breaks
• DAcid rain dissolving a marble statue

Little Cottonwood Canyon in Utah has a wide, rounded 'U-shape' with steep side walls, while nearby Big Cottonwood Canyon has a narrow, sharp 'V-shape'. What caused these two canyons to have different shapes?

• ALittle Cottonwood was carved by a slow-moving glacier, while Big Cottonwood was carved by…
• BLittle Cottonwood was formed by wind, while Big Cottonwood was formed by earthquakes.
• CLittle Cottonwood was made by lava flows, while Big Cottonwood was made by rain drops.
• DLittle Cottonwood was dug by wildlife, while Big Cottonwood was dug by humans.

During a dry spring in rural Utah, strong winds lift dark topsoil from plowed fields and carry it across counties as a thick dust storm. How does this wind erosion affect the farmlands?

• AIt adds rich nutrients and makes crops grow twice as fast.
• BIt removes fertile topsoil, making it harder for crops to take root and grow.
• CIt turns farm fields into deep ocean lakes.
• DIt prevents weeds from ever growing again.

As the Green River flows into Lake Powell, the moving water slows down dramatically. What happens to the sand and mud being carried by the river water as it enters the still lake?

• AThe sand and mud float up into the clouds.
• BThe sediment settles to the bottom of the lake, forming layers of mud and sand.
• CThe river water speeds up and dissolves the mud into gas.
• DThe sediment turns instantly into solid volcanic granite.

A student conducts an experiment with a stream table. When water flows down a steep ramp, it moves large pebbles. When the ramp angle is lowered so water flows slowly, only fine sand moves, and pebbles stay behind. What principle of erosion does this demonstrate?

• AFaster-moving water has more energy and can erode larger sediment particles.
• BSlow water has more energy than fast water.
• CPebbles float faster in slow water than sand.
• DWater speed has no effect on particle movement.

A new housing development on a hillside in Salt Lake City experiences muddy water washing down driveways after rainstorms. Which engineering solution would best prevent soil erosion on these exposed slopes?

• APaving the entire hill with black asphalt so no water touches grass
• BPlanting native grasses and shrubs whose root networks bind the soil
• CSpraying liquid soap over the dirt to make water slide faster
• DRemoving all remaining trees and rocks from the hill

The Coral Pink Sand Dunes in southern Utah feature shifting mounds of orange-pink sand up to 50 feet high. Winds blow through a pass between the Moquith and Moccasin Mountains, slowing down as they spread into the open valley. What process creates these sand dunes?

• AWind erosion stripping sand from the valley floor
• BWind deposition dropping sand as wind velocity decreases in the open valley
• CVolcanic eruptions spewing hot pink ash into mounds
• DGlacial ice pushing rocks into dune shapes

Zion Canyon was formed over millions of years as the Virgin River cut down through thick layers of Navajo Sandstone. Which statement best describes how water carved this 2,000-foot-deep canyon?

• AThe river froze into ice and blasted the canyon open in one day.
• BContinuous water flow weathered the sandstone and eroded rock debris downstream over long…
• CUnderground water pressure blew the top off the mountain like a volcano.
• DOcean waves washed over Utah and carved the canyon walls smooth.

When a river floods its banks, water spreads out across flat land called a floodplain. As the floodwater slows down, it leaves behind a fresh layer of nutrient-rich silt. What process creates fertile floodplain soil?

• AGlacial melting
• BSediment deposition
• CWind abrasion
• DChemical weathering

Scientists examine a roadcut in Sanpete County, Utah, displaying four distinct horizontal rock layers stacked on top of each other. Layer A is at the bottom, Layer B is above it, Layer C is higher, and Layer D is at the surface. Assuming the layers have not been overturned by faulting, which layer is the oldest?

• ALayer D (top)
• BLayer C
• CLayer B
• DLayer A (bottom)

Near road construction sites along Utah highways, workers install black fabric fences (silt fences) along the bottom of dirt slopes. Why are these silt fences used?

• ATo keep wild deer from crossing the highway at night
• BTo catch rainwater and turn it into drinking water
• CTo trap eroded soil and sediment so it does not wash into nearby streams
• DTo block sunlight so grass cannot grow on the slope