trigonometry review henry street hawks static electricity
TRANSCRIPT
Trigonometry Review
Henry Street
Hawks
Static Electricity
Physical and
Chemical Changes
Our Solar System
Food Webs and Chains
Carbon & Nitrogen
Cycles
Community Interactions
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What is Static Electricity?
Static electricity is stationary electrical
charges
Give three examples of
how to charge an object.
1. Charging by induction
2. Charging by friction
3. Charging by conduction
What is charging by
friction?
Charging by friction is when you rub two materials together and one has a stronger hold on electrons than the other, thereby charging the two objects
What are conductor’s and
insulator’s?
A conductor is a material that allows electrons to move easily through it.
An insulator is a material that does not allow electrons to move easily through it.
What happens when a neutral object
comes into contact with a charged
object?
A transfer of charges takes
place and the neutral object
becomes charged.
What two types of properties
are there?
Qualitative and
Quantitative
What is the difference between a Chemical
property and a physical property?
Chemical changes are changes that cannot be undone and involve a chemical reaction.
i.e.. Color, smell, energy produced
Physical changes are changes that can be undone.
i.e.. Change of state, shape, size
What type of change is this?
An egg is placed in boiling water until it becomes a
hard-boiled egg.
It is a chemical change because it cannot be undone
If two, clear, solutions are mixed with each other, and
a solid is formed at the bottom of the container,
what type of change is this?
Chemical change because in order for a solid to be formed, a
chemical reaction must take place.
If a book was ripped in half and then placed in a fire, what type(s) of changes would have
happened
Both chemical and physical changes.
The book being ripped is an example of a physical change and the burning is a chemical
change
How many planets are in our solar
system?
Only 8(remember, Pluto is not
a planet)
What is a Heliocentric solar system?
It is a solar system where the sun is the centre
(planets orbit around sun)
What is a Geocentric solar system?
It is a solar system where the earth is the centre
(planets orbit around earth)
What is a comet?
A comet is a large block of ice orbiting around a
celestial body.
What does a Herzsprung-Russel diagram show?
(HR diagram)
It shows the organization of stars organizing them by
brightness and temperature
What is a food chain?
A sequence of animals showing the transfer of
energy.
What is a food web?
A food web is a representation of feeding
relationships within a community.
What percent of energy is transferred through each tropic
level?
10%
Out of the following, which is a primary consumer:
Lion, Wolf, Deer, Grass
Deer
Where does ever food web start?
With the sun
Give two ways that Carbon enters the
atmosphere
1. Combustion of fuels
2. Respiration
3. Diffusion
What two steps in the carbon cycle lead to the creation of fossil fuels?
1.Death and decay
2.Carbonification
What is the main way nitrogen is circulated throughout it’s cycle?
Bacteria
What two ways can nitrogen leave the atmosphere?
1. Precipitation2. Nitrogen fixing bacteria
Why are the CO2 levels in the atmosphere rising?
They are rising because industries are using more fossil
fuels and that causes more carbon to be put into the
atmosphere.
What is mutualism?
Where two animals interact to benefit each
other
What is commensalism?
Where one animal benefits from another, which is unaffected.
If a honey bee takes pollen from a flower,
what type of interaction is this?
Mutualism
Honey bee is able to make honey
Other flowers are able to be polinated
What is parasitism?
One organism benefits while another is harmed
What is the difference between Predation and
Parasitism?
There is no difference. They both mean that
one organism benefits while another is
harmed.
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What is current electricity?
The constant flow of electrons
What is a series circuit?
A series circuit is: a circuit in which the electrons only have one path to follow
What is a parallel circuit?
A parallel circuit is:
A circuit in which the electrons have two or more paths to follow
What are the benefits for a parallel circuit
over a series circuit?
1. If one light bulb goes out, the rest of the circuit stays on.
2. The electrons are equally shared throughout the circuit.
Which type of circuit would be better used for Christmas lights?
Parallel since if one bulb goes out, you don’t have to search the entire wire
for the one burnt out bulb.
What is the chemical symbol for Sodium?
Na
If an element has a mass of 45 and a proton
number of 24, what is the neutron number?
45-24=21
Which of the following is the symbol for
Calcium: Ca, C, Cs
Ca
If an element has a proton number of 16,
and an atomic mass of 30, what is the atomic
number?
The atomic number is 16
What are three of the noble gases?
Helium (He), Neon (Ne), Argon (Ar), Krypton
(Kr), Xenon (Xe), Radon (Rn)
What is the chemical formula is you had two phosphorus atoms and
three magnesium atoms?
Mg3P2
What is an ionic bond?
An ionic bond is the bond between a metal ion and a non-metal
ion.
What would the chemical formula be if
you had K+1 and N-3
K3N
What are the ionic charges on Helium
and Neon
There are no charges on helium or neon because they are
non-reactive.
What is the chemical formula if you had
ammonia (NH3)+1 and Dichromate (Cr2O7)-2
(NH3)2Cr2O7
What are three examples of star classifications?
Black dwarf, white dwarf, neutron star,
supergiant, gas giant, red giant, etc.
What happens when a supergiant star dies?
It causes a supernova explosion and
becomes either a black hole or a neutron star.
What is a nebula?
A nebula is a vast cloud of dust that
gives rise to new stars
What is a binary star?
A binary star is a pair of stars that are
orbiting each other.
How is the red shift of a star
detected?
It is detected by looking at the stars
spectra and the light is shifted towards the
red end of the spectrum
What number is the atomic mass?
The smallest number
What number is the atomic weight?
The largest number
How do you find the number of neutrons of
an element?
Atomic weight – Atomic number
What group are the noble gases found in
Group 18 (8)
How many different patterns are there in the
periodic table?
?????
Define: Decomposers
Organisms that break down organic matter
What is the definition of ecosystem
Interacting organisms and their environment
What is the definition of population
The number of organisms of the same
species
What is the definition of community
An area composed of several populations
What is the definition of “niche”
An organism’s role in an ecosystem