bell ring/exam Flashcards
physical changes
-Change of form or shape. (ripping paper, shaping clay)
-Change of state.
(Solid, liquid, gas)
-Dissolving.
(dissolving sugar can be reverse if it’s boiled)
Chemical Changes
New Color appears
Heat/Light produced (hot) or absorbed (cold).
Bubbles of gas are formed
A solid material precipitate.
(the solid substance that appears when specific two substances mix)
Difficult to reverse
reactants vs products
reactants r the elements that make the products
what’s a Cation
Lose electrons and have a positive net charge
what’s a Anions
Gain electrons and have a negative net charge
Reactivity of metals vs nonmetals in periods
Reactivity of metals increases from right to left. Reactivity of nonmetals increases from left to right.
Reactivity of metals vs nonmetals in groups
Reactivity of metals increases from the top to the bottom. Reactivity of nonmetals increases from the bottom to the top
4 examples of Renewable energy
-Solar
-Wind
-Tidal (Hydro)
-Biomass (if properly managed)
2 examples of non- renewable energy
Fossil Fuels (Natural gas, propane, coal, and petroleum)
Nuclear
what’s a Path
a complete trip to and from the cell(s) with no back or repeat step
Series Circuit vs Parallel
A Series Circuit is where charges have only 1 path to follow.
A Parallel Circuit is where charges have more than 1 path to follow
What happens when a load goes out in a parallel vs series circuit?
Series– All loads in the circuit will go out
Parallel circuits– All loads in the circuit will stay the same brightness
How are Ammeters connected
Series
How are Voltmeters connected
Parallel
If the Ammeter/Voltmeter shows a negative number what does that mean?
The wires were incorrectly connected and needed to be switched
If a circuit only has one load, how must it be wired
In series
what’s a Combination Circuit
Circuit in which it has both elements of series and parallel
Unsafe use of circuits can cause
Short circuiting
What safety device can be used when the current exceeds a safe limit
A fuse will heat up and melt (breaking the circuit)
Automatic fuses
Circuit breakers
Resistor
a device that reduces the current in a circuit
Resistance
symbol and unit
symbol= R
unit= Ω (Ohm)
Current
symbol and unit
symbol=I
unit= Ampere
voltage
symbol and unit
symbol=V
unit= Volts
Advantages of wind renewable energy
Does not run out or create pollutions
Disadvantages of wind renewable energy
-expensive
-bad for birds
-not always windy
Advantages of Solar renewable energy
Does not run out or create pollutions
Disadvantages of solar non-renewable energy
-expensive
-not always sunny
Advantages of fossil fuels non-renewable energy
-not expensive
-easy to extract
Disadvantages of fossil fuels non-renewable energy
-Pollution
-will run out
Advantages of nuclear non-renewable energy
-lot’s of energy
-clean
Disadvantages of nuclear non-renewable energy
-can be deadly
Parallel law (math) all ? is the same
Voltage
series law (math) all ? is the same
Current
what’s a Biotic Factor
living organisms
what’s a Abiotic Factor
non living organisms
what’s Mutualism
both species benefit from the relationship and none are harmed. example: bees and flowers
what’s Parasitism
the parasite benefits and the host is
harmed. example: mosquitoes and humans
what’s Commensalism
one benefits and the other
neither benefits nor is harmed. example: Remora and sharks
what’s Predation
Predator-prey relationships where one organism hunts another
what’s Intraspecific Competition
competition between
individuals of the same species.
What percent of energy is passed along the food chain?
Any particular organism in a food chain will only pass on 10% of its energy to the organism that consumes it.
Photosynthesis Formula
Carbon Dioxide + Water + Energy → Sugar + Oxygen
Cellular respiration Formula
Sugar + Oxygen → Water + Carbon Dioxide + Energy
Complementary process
Cellular respiration and
photosynthesis are complementary processes
Food Chain
a sequence of feeding from one organism to another
Which level are decomposers found in
Decomposers consume organisms at every level.
Primary producers:
autotrophs
Primary consumers:
herbivores
What’s a Niche
the role an organism plays in their environment
what’s a Herbivore
Eats plants
what’s a Carnivore
Eats animals
what’s a Omnivore
Eats plants and Animals
what’s a Grazer
Eats living organisms without killing them
what’s a Predator
Eats animals (prey)
what’s a Scavenger
Eats already dead animals
what’s a Decomposer
Eats broken down dead organisms and their waste
what’s WHMIS
Workplace Hazardous Materials Information System
what’s HHPS
Hazardous Household Product Safety
Qualitative Properties
Color
State
Clarity
Odour
Taste
Texture
Luster (Shiny)