Worksheets8th grade physical science final
Total questions: 121
Worksheet time: 1hrs 2mins
The periodic law states that the properties of elements are periodic function of their
Which of the following is a noble gas?
Neon (Ne)
Which Family does Argon (Ar) belong to
Flourine (F) is in the halogen family, which two are also halogens?
Chlorine (Cl) and Bromine (Br)
Iodine (I) and Helium (He)
Boron (B) and Carbon (C)
What is the atomic number of Helium (He)?
1
2
4
8
Which of the following elements is an alkali metal?
Sodium (Na)
Chlorine (Cl)
Argon (Ar)
Zinc (Zn)
What are the rows in the periodic table called?
When a metal combines with a halogen, the kind of compound formed is called a ____
oxide
organic compound
If a metal can be hammered or rolled into thin sheets the metal is said to be
transparent
The small heavy center of an atom is the nucleus and contains which two sub atomic particles?
The number of protons in an atom with an atomic number of 18 is
An atom's ability to undergo chemical reactions is determined by
number and arrangement of electrons in its outer shell called valence electrons.
protons
What is the charge of protons?
negative
A compound that contains only carbon and hydrogen is called a
In an endothermic reaction, heat is
Melting ice is an example of what kind of reaction?
an endothermic reaction
potential change
What element is called the "basis of life" and found in all living things?
Gold
The Atomic Mass is the combination of the mass of the
The maximum number of electrons in the first energy shell is
10
The substances the left of the arrow in a chemical equation are called
The pH scale ranges from 1-
A substance that has a pH of 14 is a strong
A strong acid has a pH of
7
14
1
The maximum number of electrons in the 2nd electron shell is
1
20
How many elements have been discovered and are on the Periodic Table?
The law of Conservation of Matter states that
What are the 4 states of matter?
Solid and bricks
gels and stone
liquid and solid
plasma and gas
Combining 2 or more elements through chemical bonds, results in
friction
elemental
compounds
Isotopes are elements with different number of
Carbon has a mass of 12 (protons + neutrons), so an isotope of Carbon with a mass of 14 would be an
H2O (water) is a compound made up of what two elements?
The Oxygen atom has
The compound Carbon Dioxide (CO2) has 1 Carbon and 2 ______ atoms
A push or pull on an object is a
gravity
If a force is exerted on an object and it does not move, is there work done?
A Simple machine is
The simple machines are tools that
Is a wedge a simple machine
check all that are simple machines that make work easier
rocket
wheel and axel
Newton's 3 laws of motion pertain to how an object behaves when forces are applied
What is the most abundant gas in the Earth's atmosphere?
Oxygen (O)
Carbon Dioxide (CO2)
Nitrogen (N)
Hydrogen (H)
Which element is essential for the construction of nuclear reactors due to its ability to absorb neutrons?
Uranium (U)
Boron (B)
Lead (Pb)
Plutonium (Pu)
What type of bond is formed when two atoms share electrons?
Ionic bond
Covalent bond
Metallic bond
Hydrogen bond
Newton's First Law of Motion states that
Newton's 2nd law of Motion states that
There are unknown forces that affect motion
The force acting on an object is equal to the mass of that object divided by its acceleration
Newton's 3rd law of motion states that
Force, Mass and Acceleration are all related in Sir Isaac Newton's 3 laws of Motion: true or False
Gravity is a force : true or false
What force explains that a car rolling down an incline plane will come to a complete stop?
a push or pull that can move an object is a
Which simple machine is a flat surface that can help decrease the amount of effort to do work?
Which simple machine is an incline plane wrapped around a cylinder?
How does a wheel and axle, a simple machine, give a mechanical advantage
work is a measurement of how much force is applied over a certain ______
What information is needed to calculate Work?
Work (W) = Force (F) X Distance (D)
If the Distance moved is Zero (0), what is Work = ?
Force is measured in Newtons (N), and Distance is measured in ?
meters
length
time
1 Newton- Meter is also known as 1
Joule
W=100 J and Distance = 10 Meters, calculate the Force
0.1
10 N
Work = 50 and Force = 10 N what is the Distance an object has moved?
100 meters
How is a wedge a simple machine that gives a mechanical advantage
(Think of a wedge used to split wood )
A wedge is a simple machine that gives a mechanical advantage by using friction
A wedge is not a simple machine
Which describes work in the terms of science
Work is the result of friction and energy
Work is the outcome of a job well done
Work is the consequence of energy and time spent
What is a fixed point around which a lever is free to turn or move
Which is not a type of simple machine?
wedge
wheel and axle
lever
How does an incline plane work as a simple machine
The slope or angle of an incline plane affects the amount of force need to move an object
What term defines the use of a simple machine to decrease the amount of work necessary to move an object?
Force multiplier
Mechanical advantage.
Gravitational Force is only applied at sea level, true or false
How does gravitational force affect the orbit so the planets in space?
the earth has a magnetic field
tectonic plates
The mass of the sun (a red swarf star) is so much greater than the small planets in our galaxy
What is gravitational force?
What type of bond is formed when two atoms share electrons?
Ionic bond
Covalent bond
Metallic bond
What are the 3 sub atomic particles that make up an atom?
Photons, protons and positrons
Positrons, electrons and the nucleus
An atom of any of the 118 Elements of the Periodic Table are negatively charged, true of false?
Carbon 12 is the most common isotope of Carbon and has no charge, positive or negative, why?
Does the isotope of Carbon 13 have a charge?
An isotope only changes the number of Neutrons in the nucleus, with the same number of protons True or False
an example is Carbon 12 , Carbon 13 and Carbon 14
The earth has a magnetic field that is a result of
gravity
the Electromagnetic radiation from the sun
Describe the relationship of the Sun, Moon and Earth during a total solar eclipse?
true or false, A total solar eclipse can happen during a full moon
A total Solar Eclipse can only happen during a new moon (we cannot see any light reflected from the moon)
True
A total Solar Eclipse can only happen during a new moon.
True or False; A total solar eclipse happens all the time
Our Sun is the source of Electromagnetic Radiation that is necessary for all life on Earth: True or False
What do we refer to as The Spectrum of Electromagnetic Energy from the sun?
Electromagnetic Spectrum
Using this image of the electromagnetic spectrum, in what range do we see the colors of the rainbow?
s
Visible wavelength
radio wavelength
gamma rays
Using this image for the next ten questions, which wavelength of visible light have longer, slower particles reaching the earth?
What are the 7 colors of the visible light in the electromagnetic spectrum?
red, orange, pineapple, purple and gold
red, purple, pink, yellow, orange, green and blue
Which wavelength is the longest and slowest range
What wavelength of the Electromagnetic Spectrum causes sun burn?
What wavelength energy is used in the medical field to detect broken bones?
Microwaves are small, slow waves in which spectrum of energy on the Electromagnetic spectrum?
Microwaves are the highest frequency in the spectrum of Radio Waves
Radar and GPS use satellites and what range of wavelength in the Electromagnetic spectrum
Radio Waves
Infrared wavelength has more energy than radio waves, true of false
Nearly 50% of the rays emitted by the sun are infrared and these cannot be seen but felt as ____
Gamma rays have the highest energy and frequency; true or false
false
A wavelength is measured from crest to crest or trough to trough, which rays would best describe the shorter wavelength
radio waves
The 4 spheres of Earth are Biosphere, Geosphere, Hydrosphere and Atmosphere, which of these 4 spheres can we live without?
Biosphere, atmosphere
Geosphere and hydrosphere
we need all of them
In which Sphere of the Earth do we find igneous rocks?
Geosphere
The Earth consists of 3 main types of rocks - igneous, metamorphic and
igneous, sedimentary, and volcanic
igneous, sedimentary, limestone
The law of Conservation of Matter states that
Matter is
Anything that has mass and takes up space.
how is matter created?
Matter is not created, but rather changes form through physical or chemical processes.
GOD
All matter is made up of a combination of elements on the periodic table, true or false
Matter can be changed either physically or by a ____________ process
Heat and pressure over billions of years can change carbon (C) into __________
The five main forms of energy include: mechanical, electromagnetic, chemical, nuclear and heat.
Which form would best describe a waterfall?
Mechanical Energy involves motion, If a roller coaster is at the top and not moving is this kinetic or potential energy?
Friction is a form of what type of energy? (rub your hands together very fast)
A Solar Flare which just occurred, is a form of what type of energy?
(Think about the spectrum of energy from the Sun)
The Sun is a huge ball of
The macro study of science is the atom: true or false
true
false
Microscopes are used to study the very large universe: true of false
The pH Scale enables us to know what information?
The pH scale ranges from (what numbers)?
What is the neutral number in the pH scale?
Based on this pH scale what is the strongest acid
pH 0
HCl or Hydrochloric Acis
pH 14
Drain Cleaner
Is vinegar an acid or base?
base
With what vegetable can an indicator solution be made to determine an acid or base?
Using small pieces of pH indicator paper call ___________ paper, one can test for acidity and alkalinity (base)
When acids react chemically with bases, they form a class of compounds called
What is the process in balancing chemical equations?
Create new matter out of the elements
The atoms of each element of the compounds must stay the same on both sides of the equation
H+Cl- + Na+OH- = H2O + NaCl
Hydrochloric acid + Sodium Hydroxide = Water + Sodium Chloride
(Acid + Base = Water + Salt)
which one is salt?
(a)
