Grade 5 Science: 10 Free Practice Questions

Answer: The forest has reached its carrying capacity, meaning limited resources such as food and space can no longer support additional deer
Carrying capacity refers to the maximum population size that an environment's available resources, such as food, water, and space, can sustainably support; once a population approaches this limit, growth typically levels off due to increased competition for these limited resources, even if reproduction continues. The scenario does not indicate deer have stopped reproducing, resources are described as limited rather than unlimited, and predator disappearance is not mentioned as a cause.

Answer: Runoff carrying fertilizer from a farm into a nearby lake
Fertilizer runoff into a lake is often an unintended side effect of farming rather than a deliberate action, illustrating that human impacts are not always intentional. The other choices describe planned actions.

Answer: Mushroom
Mushrooms are fungi that act as decomposers, breaking down dead organic material. Oak trees are producers, and deer and hawks are consumers.

Answer: Omnivore
An omnivore eats both plants and animals to obtain energy. Producers make their own food, decomposers break down dead matter, and herbivores eat only plants.

Answer: Condensation
Condensation occurs when water vapor cools and changes from a gas into liquid droplets, forming clouds. Evaporation is the reverse process, in which liquid water becomes vapor. Precipitation refers to water falling from clouds, and collection refers to water gathering in bodies such as oceans and lakes.

Answer: Weathering breaks down rock, erosion transports the sediment, and deposition and compaction form new rock layers
Sedimentary rock typically forms through a sequence in which weathering breaks larger rocks into smaller sediment particles, erosion transports that sediment to a new location, and over time, the sediment is deposited, compacted, and cemented together to form new sedimentary rock layers. Molten rock cooling directly describes the formation of igneous rock, not sedimentary rock, intense heat and pressure describe the formation of metamorphic rock, and weathering and erosion are, in fact, essential steps in the sedimentary rock formation process, not unrelated to it.

Answer: The circuit must form a complete, unbroken loop that allows current to flow continuously from the battery, through the bulb, and back
For the bulb to light up, the circuit must form a complete, unbroken loop, allowing electric current to flow continuously from the battery, through the connecting wires and the bulb, and back to the battery. A gap in the circuit would actually prevent current from flowing and stop the bulb from lighting, the wires must be made of a conductive material, such as copper, rather than an insulating material like rubber, and the battery must remain connected within the circuit, not disconnected, for current to flow.

Answer: A wedge
A wedge is a simple machine consisting of two inclined planes joined together, used to split or separate materials by concentrating force into a narrow edge, exactly as the axe blade splits the log. A wheel and axle involves rotating a wide component to turn a narrower shaft, a pulley uses a wheel and rope to redirect force, and a lever pivots around a fixed point to lift a load, none of which describe a blade splitting material apart.

Answer: The changing angle of Earth's tilted axis relative to the sun as Earth orbits
As Earth orbits the sun, its tilted axis causes the angle at which sunlight strikes a given location to change throughout the year, which changes how high the sun appears in the sky at solar noon across the seasons.

Answer: Earth's tilted axis changes how much of the Northern Hemisphere faces the sun as Earth orbits
As Earth orbits the sun on its tilted axis, the Northern Hemisphere is tilted toward the sun for part of the year (longer days) and away from the sun for part of the year (shorter days), changing the length of daylight.