Science Praxis 5905. Exam Questions And
Answers (verified and Updated)
The process by which water evaporates from plant leaves and enters the atmosphere -
answer✔Transpiration
The process by which a substance transitions directly from the solid phase to the gas
phase without going through the liquid phase - answer✔sublimation
the system that absorbs nutrients into the body - answer✔digestive
An object is moving in a straight line at a constant speed. What will happen if a constant
force is then applied to the object in the same direction in which the object is moving? -
answer✔Continue moving in the same direction but will speed up
A product of cellular respiration and is used for energy transfer in cells. - answer✔ATP
gas produced by body cells when oxygen and carbon atoms from food combine; exhaled
through the lungs - answer✔Carbon Dioxide (CO2)
gas that enters the blood through the lungs and travels to the heart to be pumped via
arteries to all body cells - answer✔Oxygen
Researchers found fossils of marine organisms in rock layers that are located high above
sea level. Which conclusion is best supported by the researcher's observations? -
answer✔The area containing rock layers was previously submerged under water.
Chemical reaction that occurs when the acid HCI is mixed with the base NaCH in a
solution. - answer✔Neutralization
A method of heat transfer - answer✔Convection
Where most earthquakes occur - answer✔tectonic plate boundaries
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CH4+2 O2 (g)----CO2(g) + 2H2O (g) how many molecules of oxygen react with each
molecule of methane? - answer✔2
Biome with the greatest number of diversity of species. - answer✔Tropical Rainforest
Plant's life cycle involves the emergence of leaves and roots from a seed. -
answer✔Germintation
On the periodic table, the elements lithium, sodium, and potassium are grouped together
in the first column. Based on their locations on the periodic table, which is most likely true
about the elements? - answer✔They have similar chemical properties
Has a backbone, soft skin covered by a slippery layer of mucus, goes through complete
metamorphosis in its life cycle, lives part of its life on land and part in water. -
answer✔Amphibians
Which statement best accounts for an observation that the same object sank in the
freshwater but floated in the salt water? - answer✔The salt water was denser than
freshwater
Elements that are most abundant in the Sun. - answer✔hydrogen and helium
In plants, the chlorophyll used in photosynthesis is contained in what cell structure? -
answer✔chloroplasts
Forms when electrons are shared between two atoms - answer✔covalent bonds
An example of why the Sun appears larger than other stars, even though many stars are
actually larger than the Sun. - answer✔Placing two lit bulbs of the same size at different
distances from an observer.
Bread molds belong to this type of organism. - answer✔Fungi
A teacher rubs an inflated balloon with a wool cloth and then holds the balloon over bits of
paper that are lying on a table toward the balloon. What hypotheses in best supported by
the observed interaction between the balloon and bits of paper? - answer✔the balloon has
an electrostatic charge
Two black mice have a litter that contains some black offspring and some brown offspring.
In the mice, black fur is dominant to brown fur. Which best explains the presence of the
brown offspring? - answer✔both parents are heterozygous for black fur
_____________________ is the study of the history of life on Earth. - answer✔Paleontology
Earth is believed to be _________________________________. - answer✔4.5 billion years old
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protects Earth from harmful solar wind particles; responsible for the Northern Lights
(Aurora Borealis); lies deep within the Earth - answer✔Earth's magnetic field
charged particles escape from the sun's gravitational pull - answer✔solar wind
What would be most different about an object on Mars than Earth? - answer✔weight
What are the four inner planets: solid, liquid, or gas? - answer✔solid
What are the four outer planets: solid, liquid, or gas? - answer✔Gas MVEM(MARS)JSUN
________________ is the left over remains of a star after it explodes - answer✔Super Nova
_________________ is the study of space - answer✔astronomy
____________ is the star at the center of Earth's solar system - answer✔Sun
What is the sun made of? - answer✔hydrogen and helium
How many Earth's could fit into the Sun? - answer✔109
Define Nuclear Fusion. - answer✔how the sun produces heat and shines; when lighter
elements become heavier
True or False: Earth is much closer to the sun than other planets? - answer✔True
______________________ is how heat goes from sun to Earth. - answer✔Radiation
Includes asteroids and comets which are small rocky or icy objects that orbit the sun and
are clustered into the _______________ ________________ and found between the orbits of
Mars and Jupiter. - answer✔Asteroid Belt
Our solar system is part of a bigger star system called a __________________. -
answer✔Galaxy
A _________________ is made up of stars, dust, and gas. - answer✔Galaxy
The galaxy that is home to Earth is known as the ___________________________. -
answer✔Milky Way
The planet that is closest to Earth's size is _______________. - answer✔Venus
A _______________ is mostly made of ice, dust, and gas. - answer✔Comet
A________________ is a light flashing in the sky from space. - answer✔Meteroid
What will happen if you drop a ball from space? - answer✔It will fall slower and take longer
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