Font size
WorksheetsScience Practice 1
Total questions: 60
Worksheet time: 30mins
Organs are directly made up of what lower level of cellular organization.
A-cells
B-tissues
C-organisms
D-Organ system
What is not a component of cell theory.
A-All living organisms are composed of one or more cells.
B- Cell is the basic structural and functional unit of living organisms.
C- All cells come from pre-existing cells.
D- Mitochondria is the power-house of the cell.
On a summer day, Thomas is standing in his driveway waiting for his mother. Energy from the Sun is making Thomas feel hot. This energy is being transmitted by three different methods. Which of the following is an example of convection?
A-energy streaming through space toward Thomas
B-heat being transferred from air particles to the asphalt
C-heat moving through Thomas’s clothes to warm his skin
D-warm air rising from just above the asphalt to reach the level of Thomas’s face.
Which two systems in the human body work together to eliminate carbon dioxide (CO 2) from the body.
A-the excretory and digestive systems
B-the digestive and circulatory systems
C-the excretory and respiratory systems
D-the respiratory and circulatory systems
The diagram below represents the organizational levels of living things. Which of the following examples represents the missing organizational level?
A-blood
B-heart
C-plasma
D-Circulatory System
6- The graph below describes the velocity, measured in meters per second (m/s), of an object over a period of time, measured in seconds (s). What is the motion of the object during the time intervals A, B, C, and D?
The object is accelerating in interval A, at rest in B, decelerating in C, and at rest in D.
The object is at rest in interval A, accelerating in B, constant in C, and decelerating in D.
The object is decelerating in interval A, at rest in B, accelerating in C, and constant in D.
The object is constant in interval A, decelerating in B, at rest in C, and accelerating in D.
Photosynthesis and cellular respiration are two processes that help drive Earth’s carbon cycle. Which of the following statements best describes one of these processes?
Photosynthesis releases water as an end product.
Respiration releases oxygen that is utilized by animals.
Photosynthesis depends on the presence of carbon dioxide.
Respiration depends on the presence of water in the atmosphere.
Chemists once believed that an atom was made of negative electrons dispersed inside
a positive mass like raisins in pudding. After finding new evidence, they adopted a new model of the atom that showed the electrons orbiting the nucleus of the atom from a distance.
Which of the following statements about the new model is true?
The new model is perfect and will not change.
The new model is a wrong model and will not last.
The new model fits the data worse than the old model.
The new model fits the data better than the old model.
Which of the following situations demonstrates a physical change?
burning a match
milk going sour
melting of ice
rusting iron
Where are most mountains on Earth formed?
at volcanic chains
at strike slip faults
at mid-ocean ridges
Convergent boundaries
Earthquakes and volcanic eruptions are common on Ring of Fire at western edge of the Pacific Ocean
Which theory does this pattern of geological phenomena support?
weathering
the rock cycle
plate tectonics
biological evolution
A stream carves a channel through soil rock by removing a few small particles of rock at a time. The stream water slows down when it enters a pond, allowing the rock particles to settle at the bottom of the pond. Pressure combines these particles into a solid rock. What is the new rock called?
quartz rock
igneous rock
sedimentary rock
metamorphic rock
Phyllis is calculating the path of a space probe that will travel to Pluto.
On the way to Pluto, the probe will pass Mars, Saturn, Jupiter, and Neptune.
Which of those planets exerts the greatest gravitational force?
A-Mars
B-Saturn
C-Jupiter
D-Neptune
A basic principle for scientific research is that the experiment must be able to be replicated. What happens when an experiment is replicated?
A scientific publisher accepts the experimental results for printing.
No one in the scientific community agrees with the methods or results.
Other scientists perform the same experiment and get comparable results.
The scientific community communicates its findings to the rest of the world by publishing its work in scientific journals. This enables others to replicate and repeat other scientists’ experiments to accept or reject the hypotheses and conclusions of others. However, individual scientists do not submit their work to the scientific community before making sure they are right. How best can they ensure that their results are valid?
Scientists hire editors to review their lab reports to make sure that their explanations are clear and concise and to change anything that doesn’t sound good.
Scientists partner with mathematicians to check over all their data and charts and graphs to ensure that there are enough data, but if not, they can add to the data.
Scientists repeat their experiments just a few times to show that they can get the same results more than once and to catch any mistakes in the procedure.
The scientists repeat their experiments over and over many times to ensure that they have taken everything into consideration to communicate quality results.
Glands regulate distant parts of the human body with hormones. The pancreas regulates the body with a hormone called insulin. A biologist wanted to discover the effects of insulin from the pancreas. The biologist altered the pancreases from 30 mice. The biologist kept another 30 mice unaltered. Then the biologist recorded the differences that developed between the mice in both groups.
What method did the biologist perform to investigate the role of the pancreas?
publishing finished results
reading scientific literature
analyzing a natural experiment
conducting a controlled experiment
Bees and butterflies have a mutualistic relationship with flowering plants. Which statement describes this mutualism?
A-Bees and butterflies receive food while pollinating the flowers.
B-Bees and butterflies take nutrients away from the flowering plants.
C-Bees and butterflies compete for the limited food available from the flowering plants.
D-Bees and butterflies pollinate the flowers by flying from one to another without any harm to themselves.
Individual scientists do not submit their work to the scientific community before making sure they are right.
How best can they ensure that their results are valid?
By conducting multiple trials
By ignoring outliers
By using outdated methods
By relying on assumptions
Because sound is energy created by vibrations; through which medium will it move the fastest?
gas
liquid
solid
vacuum
Astronomers send probes to other planets to take pictures of their surfaces. An astronomer thinks that briny water flows on Mars because he noticed certain features in one picture of Mars. Which method did the astronomer use to form this hypothesis?
A-reading scientific literature
B-making careful observations
C-analyzing a natural experiment
D-conducting a controlled experiment
The validity of scientific theories and laws depends on evidence. Which of the following statements of evidence supports a law rather than a theory?
Electrons orbit the nucleus of an atom within a certain radius.
DNA analysis reveals that a modern species is related to an extinct species.
Seafloor spreading occurs at a rate of three centimeters per year in the mid-Atlantic.
The amount of matter in a closed system is the same at the start of a reaction as at the end of the reaction.
Anna pours herself some room-temperature soda from a bottle and adds four ice cubes. In a few minutes the ice cubes are smaller and the soda is much colder. Which of the following best explains the change in temperature of the soda?
Heat flowed from the soda to the ice cube and caused it to partially melt.
Coldness flowed from the ice cube to the soda, making the soda cooler.
The cold water from the melting ice went into the soda, replacing the warmer water that was in the soda
The water from the melting ice makes the soda more dilute, and the lower concentration makes the temperature lower.
Which of the following astronomical bodies is largest?
Jupiter
the Sun
the Moon
the Milky Way
A science fiction movie shows a spaceship traveling past Pluto, Saturn, the Moon, and the Andromeda galaxy. Which of these celestial objects is farthest from the Sun?
Pluto
Saturn
the Moon
the Andromeda galaxy
Which of the following physical characteristics is the same for a particular substance, regardless of the sample size?
mass
volume
heat content
melting point
25- Herbivores get energy by eating plants. Plants get energy from sunlight. Why does most of the energy captured by plants never become available to herbivores?
A-The herbivores find alternate sources of energy.
B-The plants also provide energy directly to carnivores.
C-The plants use most of their energy to maintain themselves.
D-The herbivores conserve the energy in plants for future generations.
Theresa has a pile of sand grains and salt grains mixed together. She wants to separate the sand from the salt. What method can she use to separate these two substances?
Heat the pile to 100ºC so that part of the pile boils.
Place a magnet over the pile to pull out the magnetic parts.
Sift the pile through a screen with holes that are one centimeter wide.
Stir the pile into a bowl of water, and then pour the water out of the bowl.
Granite is a sturdy rock used for monuments. It forms from slowly cooling magma.
What type of rock is granite?
igneous
metamorphic
sedimentary
weathered
The picture below shows a water molecule. What is this molecule an example of?
A-an atom
B-a mixture
C-an element
D-a compound
Which of the objects can exert a force across a distance?
A-soccer ball
B-hammer
C-magnet
D-dumbbell
30- Jeffrey brings a book from an air-conditioned apartment to a balcony on a hot summer day. How will the cool book interact with the outside air?
A-Heat from the book will move to the air.
B-Heat from the air will move to the book.
C-Coolness from the book will move to the air.
D-Coolness from the air will move to the book.
The graph shows which wavelengths, and corresponding colors of light are absorbed by the plant molecule chlorophyll. Chlorophyll is one of the molecules that plants use for photosynthesis.
Which of the following would be an accurate analysis of the information shown?
A-The least effective color of light for photosynthesis appears to be green.
B-The least effective colors of light for photosynthesis appear to be orange and red.
C-The most effective wavelengths of light for photosynthesis are between 450 and 550 nm.
D-The least effective wavelengths of light for photosynthesis are between 600 and 700 nm.
All living things are made of cells. What are cells made of?
Organs
Compounds
tissues
organ systems
The diagram represents the creation of a sugar solution by adding sugar to water then stirring the mixture. Which of the following is true of this?
The mass of the sugar and water is the same as the mass of the sugar solution.
The mass of the sugar and water is greater than the mass of the sugar solution.
The mass of the sugar solution is greater than the mass of the sugar and water.
We do not have enough information to determine anything about the mass of the sugar, water, or the sugar solution.
In convection, hot gases rise through cooler gases as they travel to the top of the Sun’s convection zone. Once they reach the top of the convective zone, they cool. What happens to these gases next?
They create sunspots.
They sink back down.
They give off energy in solar flares.
They begin the process of nuclear fusion.
Based on the graph, a star of which color most likely has the lowest absolute brightness?
Red
Blue
Yellow
White
The roller coaster cart has the most kinetic energy at position-
W
X
Y
Z
The object is moving at the same speed between points......
b-c
a-c
c-d
b-d
Which organism is a tertiary consumer in this food web?
Tree
Hawk
Fox
Caterpillar
What role does the grass play in the food web?
Producer
Primary Consumer
Secondary Consumer
Decomposer
If hunting continues and drastically reduces the deer population, how might this impact the ecosystem?
Fox do not rely on deer for food, so the fox population would be unaffected.
Having less deer would increase the mountain lion dependency on rabbits, which would lead to fewer rabbits available for the hawks.
Having less deer would decrease the fox population because it depends on Mountain Lion,
Having less deer would increase the rabbit population providing additional food for the hawks and increase the hawk population.
What would happen within a few months if all decomposers on Earth disappeared overnight?
There would be an overabundance of organic waste.
Plants would grow out of control.
Animals would grow out of control.
There would be no visible impact.
What is a characteristic shared by both predators and parasites?
They both live inside their hosts.
They both use another living thing as a food source.
They both capture and kill animals for food.
They both feed on decomposing plant material.
Certain trees, such as the dogwood, are commonly inhabited by a fungus that consumes leaves from the tree. Which of the following best describes the relationships between the tree and the fungus?
Commensalism
Competition
Mutualism
Parasitism
Lichens are actually made of two organisms: algae and fungi. The algae provide food for the fungus, while the fungus provides protection for the algae. This type of relationship is known as:
Predation
Parasitism
Mutualism
Commensalism
Flowering plants and pollinators, such as bees, have adapted together over time in ways that enhance each other’s survival. The bee obtains nectar from the flower.
How does the flower benefit from this relationship?
It gains food.
It is pollinated.
Its seeds are dispersed.
It receives growth hormones.
Sometimes when a crocodile keeps its mouth open, a bird called the Egyptian plover will fly into the mouth of the crocodile. The plover will eat food stuck between the teeth of the crocodile. The crocodile benefits by having its teeth cleaned. Which of the relationships described below is most similar to the relationship between the crocodile and the plover?
A. A type of bird in Africa eats blood-sucking insects off large mammals.
B. Foxes and eagles live in the same habitat and have similar types of prey, such as squirrels, in common.
C. Ticks are small blood-sucking insects that typically feed off small mammals.
D. Barnacles, a non-moving sea creature, rely on ocean currents for food. Some barnacles attach to the outside of a whale’s thick skin and gain exposure to more food sources.
Which of the following can limit the growth of a population of organisms?
Both diseases and the availability of resources can limit the growth of a population of organisms.
Diseases can limit the growth of a population of organisms, but the availability of resources cannot.
The availability of resources can limit the growth of a population of organisms, but diseases cannot.
Neither diseases nor the availability of resources can limit the growth of a population of organisms.
Which of the following are the three main classification domains?
Fungus, Plants, and Animals
Bacteria, Archaea, and Eukarya
Protist, Fungus, and Plants
Bacteria, Virus, and Eukarya
Based on its location on the partial periodic table shown below, which element would you predict has chemical properties that are most similar to argon (Ar)?
Chlorine (Cl)
Helium (He)
Nitrogen (N)
Zinc (Zn)
Arianna is experimenting with different materials to see which one will transmit sound the fastest. Through which of the following materials will sound waves travel the fastest?
air
concrete
oil
water
The process of converting liquid water into vapor is called ____.
Evaporation
Condensation
Precipitation
Sublimation
What is the term for a physical characteristic that results from a gene, such as eye color or height?
Genotype
Chromosome
Allele
Phenotype
What structure carries genetic information in the form of DNA?
Ribosome
Mitochondria
Golgi body
Chromosome
The picture represents Hydrogen Isotope.
What is similar between those Hydrogen atoms?
Number of electrons around the nucleus
Number of neutrons in the nucleus
Atomic mass
Number of protons in the nucleus
Airport security scanners play a vital role in ensuring passenger safety. While old metal detectors could only detect metal, the upgraded airport body scanners are also extremely good at finding non-metal objects. What type of radiation is used for in airport scanners?
Gamma Ray
X-ray
Wasps often lay their eggs just inside the eggs of butterflies. The wasp larva (baby wasps) is able to get lots of nutrients and protection from the butterfly/caterpillar egg while its developing. After the caterpillar is born, the wasps continue lurking in the flesh of the caterpillar, soaking up more nutrients and drinking its blood. The wasp larva must keep its host alive, so it avoids damaging the vital organs.
What type of symbiosis is being described?
predator/prey
competition
commensalism
parasitism
What is liquid rock stored in a chamber inside a volcano?
Magma
Mid ocean ridge
Extrusive Igneous
Lava
The end of meiosis results in ____ to each other.
2 cells that are identical
4 cells that are identical
4 cells that are not identical
2 cells that are not identical
If a scientist wants to test the effect of fertilizer on plant growth, what should be the control group?
Plants that receive double the amount of fertilizer
Plants that receive no fertilizer
Plants that receive a different type of fertilizer
Plants that receive the same amount of water
