task_name
stringclasses 7
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stringclasses 7
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stringlengths 1
4.81k
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2.18k
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|---|---|---|---|---|
arc_easy
|
arc_easy
|
Question: Which interaction within an ecosystem is characterized by gradual change from one community of organisms to another?
Answer:
|
succession
|
train
|
arc_easy
|
arc_easy
|
Question: The continuous changes of a seed to an adult plant that produces seeds is known as a
Answer:
|
life cycle.
|
validation
|
arc_easy
|
arc_easy
|
Question: When someone plays the flute, sound is produced because the air in the flute is
Answer:
|
vibrating.
|
train
|
arc_easy
|
arc_easy
|
Question: Scientists compared Pluto with other objects in the solar system and found that Pluto is smaller than Earth's moon. This finding caused scientists to question whether Pluto is a planet because
Answer:
|
the other planets are much larger than Pluto
|
train
|
arc_easy
|
arc_easy
|
Question: When an iron nail wrapped in a copper wire is attached to a circuit, it forms
Answer:
|
an electromagnet.
|
validation
|
arc_easy
|
arc_easy
|
Question: Which gas accounts for the largest percentage of greenhouse gases in the atmosphere?
Answer:
|
water vapor
|
train
|
arc_easy
|
arc_easy
|
Question: Which human body system attacks viruses and bacteria once they have invaded the body?
Answer:
|
immune
|
train
|
arc_easy
|
arc_easy
|
Question: The atoms that make up oxygen gas
Answer:
|
share two covalent bonds.
|
train
|
arc_easy
|
arc_easy
|
Question: A student wants to cut a piece of string for a class activity. The length of the string is measured BEST in which units?
Answer:
|
Centimeters
|
train
|
arc_easy
|
arc_easy
|
Question: If the atomic mass number of an atom is 35, which statement is most accurate?
Answer:
|
The number of protons does not equal the number of neutrons.
|
validation
|
arc_easy
|
arc_easy
|
Question: Biotic components need to be recycled through an ecosystem. Which type of organisms are best able to recycle nutrients back into the ecosystem?
Answer:
|
decomposers
|
train
|
arc_easy
|
arc_easy
|
Question: Roger visited his grandfather who lives on a farm. While he was there, he helped his grandfather move hay out of the barn. As Roger worked in the barn he began sneezing. Which system of the body most likely caused Roger to sneeze?
Answer:
|
immune
|
train
|
arc_easy
|
arc_easy
|
Question: Why should plants be included in investigations about the water cycle?
Answer:
|
Plants are part of the water cycle through the process of transpiration.
|
train
|
arc_easy
|
arc_easy
|
Question: Which statement best identifies a basic need of all animals?
Answer:
|
They need to eat.
|
train
|
arc_easy
|
arc_easy
|
Question: Which of the following describes an instinctive behavior?
Answer:
|
a behavior that an animal is born knowing how to do
|
train
|
arc_easy
|
arc_easy
|
Question: Which of these provide the best evidence that life could develop on Mars?
Answer:
|
its ice and organic molecules
|
train
|
arc_easy
|
arc_easy
|
Question: The primary reason that plants are important for an ecosystem is because they
Answer:
|
provide energy for consumers.
|
train
|
arc_easy
|
arc_easy
|
Question: Energy from the Sun reaches Earth by
Answer:
|
radiation.
|
validation
|
arc_easy
|
arc_easy
|
Question: Scientists study the current conditions of many solar system objects to gain insight into conditions early in the history of Earth. Which phenomenon most closely models current theories of early Earth?
Answer:
|
hundreds of active volcanoes on Io
|
train
|
arc_easy
|
arc_easy
|
Question: Jonathan places a pot of water on a stove. As the water boils, how does the state of the water change?
Answer:
|
from liquid to gas
|
train
|
arc_easy
|
arc_easy
|
Question: Animal cells obtain energy by
Answer:
|
absorbing nutrients.
|
train
|
arc_easy
|
arc_easy
|
Question: Which illness is associated with a weakened immune system in the body?
Answer:
|
cancer
|
validation
|
arc_easy
|
arc_easy
|
Question: In the human kidney, urea from the blood is filtered through the glomerular membrane into a nephron. The movement of urea across this membrane occurs without an input of energy. Which factor is the most likely reason urea absorption does not require energy?
Answer:
|
a concentration gradient
|
train
|
arc_easy
|
arc_easy
|
Question: The greatest amount of diversity can be found among which type of organism?
Answer:
|
bacteria
|
train
|
arc_easy
|
arc_easy
|
Question: Which energy type is common enough in Nevada to make a significant contribution to the renewable energy needs of the state?
Answer:
|
geothermal
|
train
|
arc_easy
|
arc_easy
|
Question: Until recently the Grand Canyon was thought to be about 5-6 million years old. Recently a scientist gathered data and wrote a paper for a scientific journal that indicated the canyon is about 17 million years old. Before this new information about the canyon is accepted, which of these needs to occur?
Answer:
|
Many scientists need to evaluate the data.
|
train
|
arc_easy
|
arc_easy
|
Question: Which human trait is most likely inherited from a parent?
Answer:
|
height
|
train
|
arc_easy
|
arc_easy
|
Question: Foam weather stripping is often placed in the frames of doors and windows in a home. What is the purpose of this weather stripping?
Answer:
|
The weather stripping reduces heat loss due to convection.
|
validation
|
arc_easy
|
arc_easy
|
Question: The items listed below were found in a science classroom. * a heart made of plastic with many of its parts labeled * clay formed to look like Earth and other planets * a giant plastic plant cell with removable cell parts These items are all examples of
Answer:
|
models
|
train
|
arc_easy
|
arc_easy
|
Question: For a technology project, Kyle came up with an idea to build a model bridge. He wants his bridge to span 50 cm and to support a 1 kg object. According to the engineering design process, which of the following should be Kyle's next step?
Answer:
|
research the different designs of bridges
|
train
|
arc_easy
|
arc_easy
|
Question: Light travels fastest through which of the following?
Answer:
|
a vacuum
|
train
|
arc_easy
|
arc_easy
|
Question: Different systems of the human body perform different functions. Which system takes oxygen from the air to be moved by the circulatory system?
Answer:
|
the respiratory system
|
train
|
arc_easy
|
arc_easy
|
Question: A solar cell turns sunlight into another form of energy. A solar cell is most like what natural structure?
Answer:
|
a plant's leaves
|
train
|
arc_easy
|
arc_easy
|
Question: The Sun appears to move across the sky each day, rising in the east and setting in the west. What causes this apparent motion?
Answer:
|
the rotation of Earth on its axis
|
train
|
arc_easy
|
arc_easy
|
Question: What causes a blue block to appear blue in the sunlight?
Answer:
|
Only blue light is reflected by the block.
|
validation
|
arc_easy
|
arc_easy
|
Question: A student determined the density of different bars of soap. Which should the student most likely do to check the accuracy of the results?
Answer:
|
repeat the experiment
|
validation
|
arc_easy
|
arc_easy
|
Question: Which method below would be the best way to determine if an egg, plastic foam, a piece of wood, or a candle would float on water?
Answer:
|
observing each object in water
|
train
|
arc_easy
|
arc_easy
|
Question: Liam lives in the Northern Hemisphere of Earth and plays in the snow in December. His friend lives in the Southern Hemisphere of Earth and plays at the beach in December. What is the best explanation for why this is possible?
Answer:
|
tilt of Earth on its axis
|
train
|
arc_easy
|
arc_easy
|
Question: A scientist needs to take a picture of the well-ordered arrangements of the atoms and molecules within a substance. Which of the following instruments would be best for the scientist to use?
Answer:
|
an electron microscope.
|
train
|
arc_easy
|
arc_easy
|
Question: Gold atoms can be identified based on the number of which subatomic particles?
Answer:
|
protons
|
train
|
arc_easy
|
arc_easy
|
Question: Which is needed for both boiling and melting to occur?
Answer:
|
heat
|
train
|
arc_easy
|
arc_easy
|
Question: Which of the following is an example of genetic engineering?
Answer:
|
Inserting a gene into plants that makes them resistant to insects.
|
train
|
arc_easy
|
arc_easy
|
Question: Which of the following is an example of a container that is filled with a pure substance rather than with a mixture?
Answer:
|
a balloon filled with helium
|
train
|
arc_easy
|
arc_easy
|
Question: Which best describes the role of the esophagus in digestion?
Answer:
|
It carries food from the mouth to the stomach.
|
train
|
arc_easy
|
arc_easy
|
Question: Which change is most likely caused by a thunderstorm?
Answer:
|
a stream flooding
|
validation
|
arc_easy
|
arc_easy
|
Question: Which is an example of an organism that has been selectively bred for a particular genetic trait?
Answer:
|
chickens that lay large eggs
|
train
|
arc_easy
|
arc_easy
|
Question: Which of these can be described as a system of stars, gases, dust, and other matter that orbits a common center of gravity?
Answer:
|
a galaxy
|
train
|
arc_easy
|
arc_easy
|
Question: The Florida Bog Frog (Lithobates okaloosae) inhabits shallow stream overflows in three counties in Florida. With such a small geographic habitat, any change in the frog's environment could cause drastic changes in the population. Which would most likely affect the frog population if acid rain changed the pH of the water?
Answer:
|
Tadpoles would be unable to survive.
|
train
|
arc_easy
|
arc_easy
|
Question: Which function do kidneys provide to maintain homeostasis?
Answer:
|
the removal of nitrogenous wastes from the blood
|
train
|
arc_easy
|
arc_easy
|
Question: While running, leg muscles work to move leg bones, and the skin helps to
Answer:
|
regulate body temperature.
|
train
|
arc_easy
|
arc_easy
|
Question: Rolanda is growing tomato plants in her garden. She has created a compost pile and has been adding compost around her tomato plants to help fertilize them. Compost is solid waste in which organic material is broken down by microorganisms in the presence of oxygen to where it can be safely stored, handled, and applied to the environment. On what does Rolanda primarily rely in order for composting to work?
Answer:
|
decomposers
|
train
|
arc_easy
|
arc_easy
|
Question: Some students were on a tour exploring the inside of a cave. While the students were in the cave, they realized they heard an echo every time that they spoke. Which most likely caused the echo to occur?
Answer:
|
the reflection of the sound waves
|
train
|
arc_easy
|
arc_easy
|
Question: A scientist uses angstrom units to measure the distance between two points. The scientist is most likely measuring the distance between two
Answer:
|
atoms.
|
train
|
arc_easy
|
arc_easy
|
Question: Based on the evidence available at the time, early models of the solar system stated that all objects in space orbited Earth. In the 16th century, an astronomer reevaluated the evidence and proposed a model of the solar system that is still in use. What part of this model corrected the mistake in previous solar system models?
Answer:
|
The Sun is at the center of this model.
|
train
|
arc_easy
|
arc_easy
|
Question: The hormone insulin is secreted by the pancreas. Which activity is most likely to trigger an increase in the levels of insulin circulating in the blood?
Answer:
|
eating
|
validation
|
arc_easy
|
arc_easy
|
Question: In gym class a student kicks a soccer ball high into the air. As the ball goes upward, which type of energy is increasing?
Answer:
|
potential energy
|
train
|
arc_easy
|
arc_easy
|
Question: Which best describes the orbit of the Moon around Earth?
Answer:
|
elliptical with a period of about one month
|
train
|
arc_easy
|
arc_easy
|
Question: In any physical or chemical process, what two quantities are always conserved?
Answer:
|
matter and total energy
|
train
|
arc_easy
|
arc_easy
|
Question: The nucleus of MOST atoms consists of
Answer:
|
protons and neutrons
|
train
|
arc_easy
|
arc_easy
|
Question: The complete removal of decomposers from an ecosystem will have the greatest effect on which of the following?
Answer:
|
the recycling of nutrients
|
train
|
arc_easy
|
arc_easy
|
Question: In an accurate diagram of the solar system, which object would be shown closest to Earth?
Answer:
|
the Moon
|
train
|
arc_easy
|
arc_easy
|
Question: Typically, sedimentary rocks are formed
Answer:
|
from materials that settle.
|
train
|
arc_easy
|
arc_easy
|
Question: Which renewable resource is used with photovoltaic cells to produce electricity?
Answer:
|
solar energy
|
train
|
arc_easy
|
arc_easy
|
Question: Which will most likely happen to a solid substance that is heated?
Answer:
|
It will melt.
|
train
|
arc_easy
|
arc_easy
|
Question: A scientist observes an unusual activity while studying bacterial cells. Using scientific inquiry to investigate the activity will enable the scientist to
Answer:
|
evaluate different explanations of the behavior.
|
train
|
arc_easy
|
arc_easy
|
Question: In order to survive, all organisms must have
Answer:
|
energy
|
train
|
arc_easy
|
arc_easy
|
Question: Which observation of a plant supports the inference that photosynthesis can take place?
Answer:
|
a green color
|
train
|
arc_easy
|
arc_easy
|
Question: To safely conduct an experiment using chemicals, what should students always do?
Answer:
|
Wear safety goggles.
|
train
|
arc_easy
|
arc_easy
|
Question: Infections may be caused by
Answer:
|
microorganisms
|
train
|
arc_easy
|
arc_easy
|
Question: Which are two parts of the carbon cycle?
Answer:
|
photosynthesis and respiration
|
train
|
arc_easy
|
arc_easy
|
Question: The digestive system breaks food into simple substances that the body can use. What system carries these simple substances from the digestive system to other parts of the body?
Answer:
|
circulatory
|
train
|
arc_easy
|
arc_easy
|
Question: A student conducts an experiment using a common but potentially harmful bacteria culture. After working with the bacteria, which is the most important safety practice to follow?
Answer:
|
wash hands and tabletops thoroughly
|
train
|
arc_easy
|
arc_easy
|
Question: Which of these environmental changes goes on for months or years?
Answer:
|
drought
|
train
|
arc_easy
|
arc_easy
|
Question: Erin placed her shamrock plant in a dark corner. Soon she saw that the leaves had tilted toward her window. What did the plant need most from the window?
Answer:
|
sunlight during the day
|
train
|
arc_easy
|
arc_easy
|
Question: Which gravitational pull has the greatest influence on Earth's tides?
Answer:
|
the gravitational pull between Earth and the Moon
|
train
|
arc_easy
|
arc_easy
|
Question: One key physical process in beach formation is wave action. Sand is deposited on beaches as waves break onto the shoreline and the energy from the wave scatters. Which type of energy is most used by wave action to modify the shape of the beaches?
Answer:
|
mechanical
|
train
|
arc_easy
|
arc_easy
|
Question: A student is asked to bring something that feels rough to class. Which would be BEST for him to bring?
Answer:
|
Sandpaper
|
train
|
arc_easy
|
arc_easy
|
Question: What tool would be used to examine a fingerprint?
Answer:
|
a hand lens
|
train
|
arc_easy
|
arc_easy
|
Question: Which of the following is a mineral?
Answer:
|
diamond
|
train
|
arc_easy
|
arc_easy
|
Question: During a rainstorm, leaves wash down a gully on a hillside. The water slows down at the foot of the hill and fans out, depositing the leaves. What geologic structure is formed in a similar way?
Answer:
|
a delta
|
train
|
arc_easy
|
arc_easy
|
Question: The change in fur color of the Arctic hare from brown in the summer to white in the winter is an example of
Answer:
|
camouflage.
|
train
|
arc_easy
|
arc_easy
|
Question: Which sense is used to tell if there is sugar in a glass of tea?
Answer:
|
Taste
|
train
|
arc_easy
|
arc_easy
|
Question: The surface of Earth is covered by a relatively thin layer of water called the
Answer:
|
hydrosphere
|
train
|
arc_easy
|
arc_easy
|
Question: All organisms contain DNA and RNA. What are the subunits of DNA and RNA?
Answer:
|
nucleotides
|
train
|
arc_easy
|
arc_easy
|
Question: How does ice change the shape of rocks?
Answer:
|
It breaks the rocks by expanding in openings.
|
train
|
arc_easy
|
arc_easy
|
Question: Which property of Earth's interior keeps the innermost part in a solid state?
Answer:
|
extremely high pressure
|
train
|
arc_easy
|
arc_easy
|
Question: Diseases that can be transmitted between organisms are
Answer:
|
infectious.
|
train
|
arc_easy
|
arc_easy
|
Question: The transfer of thermal energy from one object to another is known as
Answer:
|
heat.
|
validation
|
arc_easy
|
arc_easy
|
Question: Which part of the body carries out the function of copying DNA?
Answer:
|
cells
|
train
|
arc_easy
|
arc_easy
|
Question: The atomic mass of an atom is
Answer:
|
the sum of protons and neutrons.
|
train
|
arc_easy
|
arc_easy
|
Question: Different species of carnivorous animals that share the same habitat in an ecosystem may
Answer:
|
compete for food
|
train
|
arc_easy
|
arc_easy
|
Question: Which scientist is best known for studying plants and animals?
Answer:
|
Charles Darwin
|
train
|
arc_easy
|
arc_easy
|
Question: Green plants get the energy they need to make food from
Answer:
|
sunlight
|
train
|
arc_easy
|
arc_easy
|
Question: The movement of soil by wind or water is called
Answer:
|
erosion
|
train
|
arc_easy
|
arc_easy
|
Question: Arctic areas are covered with snow and ice for much of the year. Which color rabbits would be safest from foxes there?
Answer:
|
white
|
train
|
arc_easy
|
arc_easy
|
Question: The ratio of an object's mass to its volume is its
Answer:
|
density.
|
train
|
arc_easy
|
arc_easy
|
Question: As the hawk population increases in an ecosystem, the deer mouse population will most likely decrease as a result of
Answer:
|
increase in predators.
|
train
|
arc_easy
|
arc_easy
|
Question: Greenhouse gases in the atmosphere trap heat near Earth's surface. Which of these is a greenhouse gas?
Answer:
|
water vapor
|
train
|
arc_easy
|
arc_easy
|
Question: What happens during photosynthesis?
Answer:
|
Plants change light energy into food energy.
|
train
|
arc_easy
|
arc_easy
|
Question: Which is an example of a chemical reaction?
Answer:
|
The burning of wood
|
train
|
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