GENERAL SCIENCE (DOST REVIEWER) Flashcards
This General Science Practice Test is comprised of 50 random questions from General Biology, Chemistry, Physics, and Earth Science that will test your ability in accomplishing various important scientific tasks.
According to Newton’s third law of motion, the strength of a reaction force is ____________________ the strength of the action force.
Equal to
What is the curved path that an object follows when thrown or launched near the surface of the Earth?
Projectile Motion
A skydiver with a mass of 70 kg accelerates to Earth at a rate of 9.8 m/s2 due to gravity. What is the force on the skydiver?
686 Newtons
The hardest form of carbon is?
Diamond
Emma believes viruses are not living organisms while Kayla believes viruses are living organisms. Who is correct and why?
Emma, because viruses cannot reproduce on their own.
A solid formed by the chemical reaction of some solutions is a
Precipitate
You are at the Kennedy Space Center, sitting in your rocket, ready to launch. You look out the window and view the sky. You are currently sitting at the lowest level of the atmosphere. What is this level called?
Troposphere
What is the greenhouse effect?
The warming of a planet due to trapped radiation.
The existence of microorganisms in the human gastric system is an example of
Mutualism
The gravitational force with which the sun attracts the earth:
is same as the force with which the earth attracts the sun.
The mass number of a nucleus is:
the sum of the number of protons and neutrons present in the nucleus.
A force is a ____________________
push or pull
Who formulated the geocentric theory?
Ptolemy
In natural selection, one variation which is present in ALL members of a population is a called a -
adaptation
Which is/are the important raw material(s) required in cement industry?
Limestone and Clay
Isotopes of an element contain same number of:
Protons but different number of neutrons.
The thinnest layer of the Earth is?
Crust
What is an example of velocity?
20 m/s East
Kepler’s second law or the equal area law states that the closer a planet is to the sun the ________ it travels.
Faster
Earth rotates in about _______ hours.
24
When two mercury drops are brought into contact, they merge to a bigger drop because liquids have tendency to possess:
Minimum surface area
Around what body of water will you find the region known as the Ring of Fire?
Pacific Ocean
Any force that causes an object to move in a circle is called a(n)
centripetal force
A battery operated DVD player uses 12 volts from AA batteries and draws a current of 3 amperes. What is the resistance?
4 ohms
Which layer of Earth has the GREATEST density and is solid?
inner core
During summer, we feel comfortable under a fan because it:
Set the air in motion, thereby increasing the evaporation of sweat.
Distillation is the process of separating liquids by using _____.
evaporation and condensation
Vitamin D can be obtained from _______________.
Sunlight
What is an example of a homozygous dominant genotype?
BB
The lithosphere combines what two layers?
Crust & Upper Mantel
Ptyalin is an enzyme produced in the:
Pancreas
Optic fibers are mainly used for which of the following?
Communication
One should not connect a number of electrical appliances to the same power socket because:
this can damage the domestic wiring due to overloading.
Which two substances can be mixed together to form a new substance through a chemical reaction?
Baking soda and vinegar
Scientists once thought that the continents had formed in their current locations. Alfred Wegener first published this theory of continental drift in 1915. Which of the following provides evidence for continental drift?
Africa North America and South America fit together like puzzle pieces.
The Earth’s diameter is approximately how many kilometers?
12,756
The universal law of gravitation was propounded by:
Isaac Newton
Sound of frequency below 20 Hz is called:
infrasonic
What happens when two forces act in the same direction?
Their strengths are added
Fill in the blanks: Proteins are made of different ____________ which are arranged in different orders, or _________________.
amino acids, sequences
A student mixes apple juice, water, and cinnamon together. Did a chemical reaction occur?
No, because the properties stayed the same.
In animals, sexual reproduction depends on the production of gametes. Which of the following processes produces gametes in animals?
Meiosis
Carbon dioxide is called a greenhouse gas because:
It absorbs infrared radiation.
The flower of a plant is involved in reproduction. Which parts are male and which are female?
Male: stamen; female: pistil
Natural radioactivity was discovered by:
Henri Becquerel
What is the name of the solid that forms after some solutions react chemically?
Precipitate
