2nd Grade Science : 2nd Grade Science
Study concepts, example questions & explanations for 2nd Grade Science
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Example Questions
Example Question #5 : Speed Of Various Earth Events
California had two significant events that took place today that shook residents up. The first was a sudden earthquake that rocked downtown Los Angeles and terrified residents! It was over as soon as it started but did pretty severe damage to many homes and buildings. There were no injuries or deaths, luckily. The other event was not as damaging to homes and buildings but to the coast. Today a large piece of cliffside slid downwards onto the beach below after decades of wind and water beating against it. Scientists had been monitoring for many years the damage to the cliffside by Mother Nature.
Which keywords/phrases from the text allude to an event happening quickly?
"earthquake that rocked downtown"
"sudden" and "over as soon as it started"
"no injuries or deaths"
"decades" and "many years"
"sudden" and "over as soon as it started"
In the case of these two events, the earthquake happened quickly. Some events like natural disasters happen very rapidly, and there is little time to prepare. In the case of the cliffside breaking, this was said to have been after "decades" and that "scientists were monitoring it for many years," which means it was happening slowly. The author uses language like "sudden" and "over as soon as it started" to show that the earthquake was something that happened fast, and there was no delay.
Example Question #6 : Speed Of Various Earth Events
Which photo shows an Earth event that would happen quickly (in days or weeks)?
All of the photos are of events that happen quickly
All of the photos are of events that happen quickly
Three of these photos depict events that happen very quickly over time. The images showing clouds forming, a giant wave, and a hurricane all happen quickly. The storm may build or develop over a week or so, but within a day or so, the bad weather will pass. The way the storm changes the landscape may stay around longer, but the event itself happens quickly. Waves cause changes to the land over time, but things like tsunamis can occur rapidly. Clouds form and dissipate all day in a continual cycle.
Example Question #1 : Use Sources To Show That Some Earth Events Occur Slowly
One of the slowest events on Earth that can change the shape of the land is erosion.
What does the term erosion mean? Example: The erosion of the beach left many homes at risk for collapse. The sand is still sliding and moving closer to the ocean.
Something beautiful and unique
Wearing away or moving weathered materials
Breaking down of plants
A large tropical storm
Wearing away or moving weathered materials
Erosion is an event that happens daily on Earth, but it happens very slowly. Erosion is the movement of the broken down materials from weathering. The dirt, plant matter, rocks, and other materials are moved to a new location, and new landforms are created while others are destroyed or changed.
Example Question #2 : Use Sources To Show That Some Earth Events Occur Slowly
The Grand Canyon is one of the United State’s best examples of erosion. Wind, rain, and the Colorado River slowly created it. These forces cut and shaped the area into what it is today. The Appalachian Mountains were a towering mountain range millions of years ago. Today their highest point is 6,684 feet tall. That same peak used to be an estimated 20,000 feet high. Erosion over time has worn the mountains down and changed them forever.
Which keywords or phrases from this text show that these events happened slowly?
"one of the United State’s best examples," "cut and shaped the area," and "The Appalachian Mountains"
"The Grand Canyon is one of the United State’s best examples of erosion."
"slowly," "were a towering mountain range millions of years ago," "erosion over time," and "used to be"
"Colorado River slowly," "towering mountain range," "highest point is 6,684 feet tall," and "20,000 feet high."
"slowly," "were a towering mountain range millions of years ago," "erosion over time," and "used to be"
Erosion is an extremely slow process, but the results are extraordinary. The clues in the text that let readers know this is a slow-moving process is "slowly," "were a towering mountain range millions of years ago," "erosion over time," and "used to be." These words and phrases all hint to something taking a long time to happen. Some processes on earth happen quickly, but not erosion!
Example Question #1 : Use Sources To Show That Some Earth Events Occur Slowly
Which photo shows an Earth event that happens slowly (in months or years)?
The photo that shows a slowly occurring Earth event would be the cliffsides of a beach. These have been worn away over many years (millions) as the dirt, sand, and rocks eroded. Lightning strikes, tropical storms, and wildfires are all quickly occurring events.
Example Question #2 : Use Sources To Show That Some Earth Events Occur Slowly
Why is this photo an example of an event on Earth that happens slowly?
It is from an earthquake that took place.
It is a very fast-moving river.
It is an example of a place people can visit and take photos.
It is an example of weathering and erosion.
It is an example of weathering and erosion.
The provided photo depicts a stream or river racing through a carved out section of a canyon. This process is called weathering and erosion and takes millions of years to happen. The river beating into the sides of the canyon breaks apart small pieces of rock and sand, and the water pushes it downstream. The results are a carved section with deposits of debris downstream.
Example Question #3 : Use Sources To Show That Some Earth Events Occur Slowly
What is the definition of weathering? Example: Weathering is an important factor in the creation of new landforms.
What the temperature and rain conditions are like outside
A type of mountain
The process of predicting upcoming storms
The process of being worn down or broken
The process of being worn down or broken
Weathering is the process of breaking down or wearing down the Earth with wind or water. As rivers move through areas banks and canyons are formed. Wind and rain beat on the cliffsides and cause pieces to break away. These are examples of the slow-moving process of weathering.
Example Question #1 : Use Sources To Show That Some Earth Events Occur Slowly
The Grand Canyon is one of the United State’s best examples of erosion. Wind, rain, and the Colorado River slowly created it. These forces cut and shaped the area into what it is today. The Appalachian Mountains were a towering mountain range millions of years ago. Today their highest point is 6,684 feet tall. That same peak used to be an estimated 20,000 feet high. Erosion over time has worn the mountains down and changed them forever.
What conclusion can the reader make about the formation of mountains?
It happens quickly.
It happens slowly.
No one knows how long it takes.
It doesn't happen.
It happens slowly.
Erosion is a prolonged process, but the results are extraordinary. The clues in the text that let readers know this is a slow-moving process is "slowly," "were a towering mountain range millions of years ago," "erosion over time," and "used to be." These words and phrases all hint to something taking a long time to happen. Some processes on Earth happen quickly, but not erosion!
Example Question #1 : Use Sources To Show That Some Earth Events Occur Slowly
California had two significant events that took place today that shook residents up. The first was a sudden wildfire that struck the forested area outside of Los Angeles and terrified residents! It didn't rage for very long before firefighters put it out. A flick of a match is all it takes to start a massive fire. There were no injuries or deaths, luckily. The other event was a slippery mess. Northern California had been experiencing heavy rains for days, and because of years of erosion to cliffsides and roads, a terrible mudslide began. It is still ongoing, and there is no real way to stop it, it has to run its course. Unfortunately, when land is broken down over time, it becomes more dangerous in the case of prolonged rainstorms.
What are the keywords/phrases in this text that allude to an event that happens slowly?
"terrible mudslide"
"slippery mess" and "mudslide"
"sudden" and "heavy"
"years of erosion" and "over time"
"years of erosion" and "over time"
In the passage given, the event that happened slowly was the mudslide. Events on Earth can happen at different speeds. The wildfire is described as "sudden," "didn't rage for long," and "a flick of a match" can start them. This is all language that shows how quickly the fire started. The mudslide, on the other hand, is described as happening after "heavy rain for days," and that "years of erosion" led to the right conditions. The text also states that the mudslide is "still ongoing" and that "when land is broken down over time," conditions become more dangerous. This demonstrates an event that takes a long time or happens slowly.
Example Question #1 : Use Sources To Show That Some Earth Events Occur Slowly
Why is this photo an example of an event on Earth that happens slowly?
Cliffsides never change or are created.
Cliffsides can take millions of years to form.
Cliffsides can take days to form.
Cliffsides can take weeks to form.
Cliffsides can take millions of years to form.
Cliffsides are formed over thousands, if not millions of years of weathering and erosion. Waves, wind, rain, and possible vegetation and ice wear away the rock and break it over the years. Water and wind carry the broken pieces away to new places. This is a very slow-moving process.
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