Create a grade 5 reading Comprehension worksheet longer 700 words related to science
Of course! Here is a grade 5 science reading comprehension worksheet that is over 700 words long. It includes a reading passage, vocabulary, multiple-choice questions, and short-answer questions, followed by an answer key.
Grade 5 Reading Comprehension: The Great Yellowstone Comeback
Name: _________________________
Date: _________________________
Instructions: Read the following passage carefully. After you finish reading, answer the questions that follow. Use information from the text to support your answers.
The Web of Life in Yellowstone
Imagine a beautiful, sprawling park with rushing rivers, vast forests, and wide-open grasslands. This is Yellowstone National Park, one of America’s greatest natural treasures. An environment like this, where living things like plants and animals interact with non-living things like water, soil, and sunlight, is called an ecosystem. In every ecosystem, there is a delicate balance, and every single creature, from the tiniest insect to the largest bear, plays an important role.
For many decades, however, something very important was missing from Yellowstone. The gray wolf, a key predator, had been hunted and completely removed from the park by the 1920s. At the time, people thought getting rid of wolves would be good for the park, protecting the “more desirable” animals like elk and deer. They didn’t understand the complex connections that tied the entire ecosystem together.
Without wolves to hunt them, the elk population in Yellowstone exploded. A few extra elk might not seem like a big deal, but soon there were thousands upon thousands. These large, hungry animals are herbivores, meaning they only eat plants. They spent their days grazing, and they especially loved the young willow and aspen trees that grew along the riverbanks. They ate so many of these saplings that the young trees couldn’t grow into mature forests. The riverbanks, once lush and green, became bare and eroded.
This caused a chain reaction of problems. With no tree roots to hold the soil in place, the riverbanks began to crumble into the water, making the rivers wider, shallower, and dirtier. This wasn’t good for the fish. Beavers, who rely on willow trees for food and for building their dams, couldn’t find what they needed and they too began to disappear. Beaver dams are incredibly important because they create ponds and wetlands that provide homes for otters, muskrats, fish, and amphibians. With the beavers gone, these habitats vanished. The whole system was out of balance.
Then, in 1995, scientists decided to try something bold. They decided to bring the wolves back. They captured wolves from Canada and released them into Yellowstone National Park. The wolf is an apex predator, which means it is at the very top of the food chain with no natural predators of its own. Its return was about to change everything.
The wolves began to do what wolves do: they hunted elk. This directly reduced the elk population. But something even more interesting happened. The wolves also changed the behavior of the elk. The elk became more cautious. They stopped spending all their time in open river valleys where they were easy targets for a wolf pack. Instead, they moved to more protected, forested areas.
Because the elk were no longer grazing along the riverbanks all day, the willows and aspen trees had a chance to grow again. Within just a few years, the banks of the rivers were thick with young trees. The new tree roots stabilized the soil, stopping the erosion. The rivers began to narrow and form deeper pools. The water became clearer and cooler, which was perfect for trout.
The return of the trees brought back the beavers. The beavers built dams, creating new ponds and marshlands. These new wet habitats attracted birds, ducks, amphibians, and fish. The songbirds had more trees to nest in. Bears, another major predator, benefited too. They feasted on the berries that grew on the new shrubs, and they also had an easier time finding fish in the healthier rivers. Even scavengers, like eagles and coyotes, benefited from the leftovers of wolf kills.
This incredible, cascading chain of effects that starts at the top of the food chain and flows all the way down to the bottom is called a trophic cascade. The reintroduction of a single species, the wolf, sent ripples of change throughout the entire Yellowstone ecosystem, helping to restore the balance that had been lost for over 70 years.
The wolf is now known as a keystone species in Yellowstone. In architecture, a keystone is the central stone at the top of an arch that holds all the other stones in place. If you remove it, the arch collapses. In an ecosystem, a keystone species is an animal or plant that has a huge effect on its environment. Without it, the whole ecosystem can change dramatically, just like a collapsing arch. The story of the Yellowstone wolves is a powerful lesson in how interconnected nature truly is, showing us that every piece of the puzzle is important.
Questions
Part A: Vocabulary
Match the word from the text with its correct definition.
- Ecosystem ______
- Herbivore ______
- Apex Predator ______
- Trophic Cascade ______
- Keystone Species ______
Definitions:
A. An animal that only eats plants.
B. An animal at the top of the food chain.
C. A species that has a very large and important effect on its entire environment.
D. A community of living organisms interacting with their physical environment.
E. When a change at the top of a food chain causes a series of changes all the way down.
Part B: Multiple Choice
Circle the best answer for each question.
-
What was the main problem in Yellowstone after the wolves were removed?
a) There were too many bears.
b) The elk population grew too large.
c) The rivers flooded the grasslands.
d) There were not enough tourists. -
How did the large elk population damage the rivers?
a) They drank all the water.
b) They built dams that blocked the flow.
c) They ate the young trees on the riverbanks, which led to erosion.
d) They scared away all the fish. -
An apex predator is an animal that…
a) is hunted by many other animals.
b) only eats plants and berries.
c) lives at the bottom of the food chain.
d) is at the top of the food chain. -
Which of the following was a direct result of the willows and aspen trees growing back?
a) The wolves had more places to hide.
b) The beavers returned because they had food and building materials.
c) The elk population started to grow again.
d) The park became a more popular place to visit. -
What is the main idea of the entire passage?
a) Wolves are dangerous animals that should not be in parks.
b) Elk are the most important animals in Yellowstone.
c) Reintroducing a single keystone species can restore balance to an entire ecosystem.
d) Beavers are the best architects in the animal kingdom.
Part C: Short Answer Questions
Write your answers in complete sentences. Use details from the text to support your answer.
- Explain in your own words why the beavers disappeared from Yellowstone and why they came back.
- The passage describes a “trophic cascade.” Describe two specific examples from the text that show this cascade in action after the wolves returned.
- Based on the reading, why is calling the wolf a “keystone species” a good comparison to the keystone in an arch?
Answer Key
Part A: Vocabulary
- D
- A
- B
- E
- C
Part B: Multiple Choice
6. b) The elk population grew too large.
7. c) They ate the young trees on the riverbanks, which led to erosion.
8. d) is at the top of the food chain.
9. b) The beavers returned because they had food and building materials.
10. c) Reintroducing a single keystone species can restore balance to an entire ecosystem.
Part C: Short Answer Questions
(Note: Student answers may vary slightly but should contain the key ideas below.)
-
Explain in your own words why the beavers disappeared from Yellowstone and why they came back.
The beavers disappeared because the large elk population ate all the young willow trees along the riverbanks. The beavers needed these trees for food and to build their dams, so without the trees, they could not survive. They came back after the wolves were reintroduced because the wolves hunted the elk and changed their behavior, which allowed the willow trees to grow back. With their food source returned, the beavers could return and build dams again. -
The passage describes a “trophic cascade.” Describe two specific examples from the text that show this cascade in action after the wolves returned.
(Students should list two examples. Here are a few possibilities):- Example 1: The wolves hunted elk (top of the chain), which allowed trees to grow back. The trees stabilized the riverbanks (bottom of the chain), making the rivers healthier for fish.
- Example 2: The wolves caused elk to avoid certain areas (top of the chain), which allowed willows to grow. This brought back the beavers (middle of the chain), who built dams that created ponds for otters, fish, and birds (bottom of the chain).
- Example 3: The wolves left behind leftover kills (top of the chain), which provided food for scavengers like bears and eagles (middle/bottom of the chain).
-
Based on the reading, why is calling the wolf a “keystone species” a good comparison to the keystone in an arch?
The passage says a keystone in an arch is the central stone that holds all the others in place; if it’s removed, the whole arch collapses. This is a good comparison because when the wolf (the keystone species) was removed from Yellowstone, the ecosystem started to “collapse.” The elk population exploded, trees disappeared, rivers eroded, and other animals left. When the wolf was put back, it helped hold the whole ecosystem together again, restoring balance just like a keystone supports an arch.