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?

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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