Science 10F Exam Flashcards
What kind of trait is colour blindness?
Phenotype and a sex linked trait
The “Big Bank Theory” is a possible explanation for what origin?
The origin of our universe.
Who developed the Periodic Table of Elements? When?
Dmitri Mendeleev in the late 1800’s.
What are the 6 main properties of metal?
Solid at room temperature Shiny luster Good conductors (heat+electricity) Malleable Ductile Reactive with acid and oxygen
What kind of device converts light energy into electrical energy?
A photocell
Which unit would best measure the distance between the earth and the sun? What does it stand for?
AU=Astronomical Unit
Where are sperms produced?
In the testes
What are the state of metalloids at room temperature?
Solid
What does nuclear fusion produce?
Light energy
How many elections does the first she’ll hold?
Two
Who was responsible for suggesting that the Earth was not the centre of the universe?
Copernicus
What kind of liquid does the Cowper’s Gland produce?
A lubricating fluid
What is a lightning rod? Why are they attached to tall buildings?
Is a metal rod used in tall buildings such as skyscrapers yo divert lightning to the ground
The organism’s phenotype refers to what?
It refers to the visible trait determined by the genes present
An organism made up of a Dominant Gene and a recessive gene is called a what? (2)
A hybrid or a heterozygous
What are the five examples of asexual reproduction?
Budding Sporulation Binary fission Vegetative Propagation Regenerative
What are the three methods of charging an object?
Friction Conduction Induction
What are the four terrestrial planets?
Mercury Venus Earth Mars
What are the six properties of non-metals?
Over half are gasses at room temperature Others are solids and liquids Dull luster Usually poor conductors of heat and electricity Brittle or crumbly (non malleable) Non-Ductile
How is current measured?
Amperes Or Amps
What are three points on asteroids?
Known as “minor planets” Irregular, rocky bodies found primarily in the “asteroid belt” between Mars and Jupiter From 1-1000 km in size
What are three points on matter?
Anything that has mass and occupies space The atoms that our universe is made up of Neither created or destroyed, but can change form (physical and chemical changes)
What did Socrates and Aristotle do in 450 BCE? 2
Wondered about matter But did no experimentation
What are atoms? 3
Is the matter that the universe is made of The smallest particles of matter that are the building blocks of the elements they make up. Made up of three main sub-atomic particles (protons, neutrons and electrons)
What sub-atomic particle has negligible mass?
The electron
What is voltage?
Is the energy (push) required to move electrons through a conductor.
What are phases of mitosis?
Interphase Prophase Metaphase Anaphase Telophase + Cytokinesis
What is meiosis?
The type of cell division that HALVES the number of chromosomes during the production of gametes. Occurs in the reproductive organs Involves replication (like mitosis) and then TWO CELL DIVISIONS
What supplies voltage?
Batteries Generators
How is energy measured?
By joules or kilowatt hours
What is a chemical equation?
Is the shorthand way to show a chemical reaction (atoms bonding to form new compounds)
What is energy? 2
Is the work done by electricity as it is converted to other forms of energy. The amount of energy used depends on the power rating of an appliance and the total time it is used.
What are meteors / meteorites? 2
Shooting Star’s DUST and rock fragments that enter the earth’s atmosphere They are heated up and they vapours especially or burned up as they fall.
What is the advantage of sexual reproduction?
Combining gametes creates genetically unique offspring that allow the species to adapt and survive
What is a neutron?
Are particles with no charge in the nucleus
What are 7 examples of a physical change in matter?
Melting #ice to water# Freezing #paper yo ice# Boiling #paper to ice# Bending#magnesium# Crushing #paper# Dissolving #salt# Drawing into a wire #copper#
What is Induction?
Is the charging of neutral objects through a temporary rearrangement of electrons. #No CONTACT is made#
What is a circuit?
Is a complete, closed pathway for an electric current to follow
What are the five components of a geocentric model?
Earth in the middle an did NOT move Moon orbiting Earth Sun closest star to orbit Earth Some UN-NAMED planets orbiting after the sun Then fixed stars
What happens during Interphase? 6 words
Normal cell functions then chromatins replicate
What is the first phase of how a lightning occurs?
Friction - electrons and protons are polarized
What are seven properties of metalloids?
Metal and non-metals properties Solid at room temperature Shiny or dull luster May conduct electricity Poor conductors of heat Brittle or crumbly Non-Ductile
How was the Periodic Table of Elements originally organized?
By atomic mass and reactivity
What is a Homologous Chromosomes?
Is if the zygote (offspring) receives 2 chromosomes (genes) for brown eyes, it will have brown eyes. If the offspring is given a pedigree of genes for something, it is guaranteed to possess this traits.
What did Empedocles philosophized? 2
Proposed the “4 Elements Theory” Matter is composed of Earth, air, water and fire.
What is Electrostatics?
The study of electricity charged objects or static electricity
What is Galaxy? 2
Is a huge accumulation of stars and their orbiting planets, NEBULAE gases and dust held together by gravity. The Milky Way Galaxy has 400 billion stars including our sun
What is Sexual reproduction? 2
Is the production of offspring from the joining of male and female sex cells Male and female sex cells each contribute to the chromosomes of the offspring
What is current? 2
The continuous flow of electrons through a conductor. The moving electrons give up their energy to a resistor (appliances, bulb, etc)
What are insulators? 3 plus the examples
Materials on which charges will build up Insulators do not easily allow the flow of electrons Ex. Plastic, wood, glass
What is a chemical formula? 2
Is the shorthand way to write the name of a compound Ex. Water is H2O
What is Atomic Mass? 3
Is equal to the number of protons and neutrons in the nucleus (where mass is concentrated) because electrons have negligible mass. The atomic mass of one atom of an element is an average All atoms of an element always contain the same number of protons and neutrons but can have different variation, (may contain more neutrons)
What is a Conductor? 3
Are materials in which charges can move some distance Conductors do allow a flow of electrons Ex. Metals
What is resistance? 2
Is the opposition to the flow of electrons caused by friction Produces heat, light or mechanical energy
How high or low is the resistance of Good Conductors?
They have low resistance.
What is this?
a load or resistor
