Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
science exam
| Question | Answer |
|---|---|
| All steps of the scientific method | Question Hypothesis Procedure Observations Analysis Conclusion |
| What is an independent variable | The variable changed by the experimenter |
| What is a dependent variable | The variable changed as a result of the independent variable (what you measure) |
| Format for scientific question | What is the effect of (independent) on (dependent)? |
| Format for hypothesis | If (i change this) then (this will happen) |
| Anagram to help remember unit conversions? | King Henry Died By Drinking Chocolate Milk |
| Particle theory of matter? | 1) All matter is made up of tiny particles 2) AllParticlesOfAPureSubstanceAreTheSameAnd Aredifferent from particles of another pure substance 3) Particles are always moving 4) Particles attract eachother 5) Higher temperature=Particlesmovefast |
| What is matter? | Matter is everything that has a mass and takes up space |
| Physical Properties | Observed with senses |
| Chemical properties? | Describes the behaviour of a substance as it turns into a new substance |
| Formula for density? | D=m/v |
| Formula for volume? | V=m/d |
| Formula for mass? | m=dxv |
| What is a pure substance? | Made of only one kind of particle, cannot be separated |
| What is a mixture? | Made of two or more pure substances, can be seperated |
| What is a Mechanical Mixture (heterogeneous) | 2 or more pure substances, can see different particles, Not unformly scattered. Ex: cereal in milk, ice in soda |
| What is a Solution (homogenous) | 2 or more substances, looks or feels like its made of one, Unformly scattered particles. Ex: Saltwater, |
| Ca | Calcium |
| Ag | Silver |
| He | Helium |
| C | Carbon |
| Li | Lithium |
| Cu | Copper |
| Pb | Lead |
| S | Sulphur |
| Cl | Chlorine |
| Mg | Magnesium |
| H | Hydrogen |
| Hg | Mercury |
| P | Phosphorous |
| Br | Bromine |
| K | Potassium |
| Au | Gold |
| O | Oxygen |
| N | Nitrogen |
| B | Boron |
| Al | Aluminum |
| Zn | Zinc |
| Be | Beryllium |
| Na | Sodium |
| Ni | Nickel |
| Si | Silicon |
| F | Fluorine |
| Ne | Neon |
| Ar | Argon |
| Atomic number= | # of protons and electrons |
| Atomic mass= | |
| # of protons + # of neutrons | |
| Tjny pieces that cannot be broken down further are called ..... | Atoms |
| Where are protons found | In the nucleus |
| Where are neutrons found | In the nucleus |
| Where are electrons found | Outside the nucleus |
| Atoms are mostly ...... space | Empty |
| Atoms are like letters and molecules are like .... | Words |
| What makes one atom different from another atom | The number of protons in the nucleus |
| Everything is matter except for what? | Energy |
| What element is in every living thing | Carbon |
| How to find the # of neutrons | atomic mass - atomic number |
| What are alkali metals | Very reactive metal , 1 valance electron (easy to lose) |
| What are alkaline earth metals | Reactive metals, 2 valance electrons (easy to lose) |
| What are transitions metals? | unreactive, conducts electricity |
| What are halogens? | Reactive non metal, 7 valance electrons (easy to gain) |
| What are noble gases? | Non reactive, full outer electron shell |
| atoms in a compound are held together by .... | chemical bonds |
| What is a physical change | No new substance is formed, only alters the form or state, usually reversible |
| What is a chemical change? | New substance is formed, not usually reversible, product has different physical and chemical properties |
| If the outer shell of an atom is full of electrons its called what? | Stable octet |
| Ionic compounds form between a ____ and a -______ | Ionic compounds form between a METAL and a NONMETAL |
| Do noble gases gain or lose electrons | No because they have full outer orbits |
| What is a cation | Positive ion , Loses an electron (F -> F1+ |
| What is a negative ion | Anion , gains an electron (F -> F1-) |
| What is biodiversity? | The measure of the diversity of species on earth |
| What is ecology? | The study of interactions between living organisms and nonliving components of their environment |
| Abiotic factors | non living factors , sunlight, temperature, wind |
| Biotic factors | Living factors , Plants, animals, bacteria |
| What are the most important things ghings for life on earth | Air (atmosphere Water (hydrosphere) Land (litosphere) Sun (energy) |
| More diversity = | Likely more sustainable |
| Carbon cycle | Carbon cycles through the atmosphere and organisms in photosynthesis and cellular respiration |
| Photosynthesis | Reactants - carbon dioxide + water + light energy = Products - glucose + oxygen |
| Cellular respiration | Reactants - glucose + oxygen = Products - carbon dioxide + water + useable energy |
| 79% of the atmosphere is made up of what? | Nitrogen gas (N2) |
| Nitrogen fixation | Bacteria that live in soil take nitrogen from atmosphere and turn it into ammonia (NH3) a form that is usable by plants |
| Run off | Water flows downwards |
| Accumulation | Water pools |
| Transpiration | Evaporation off plants |
| Factors that increase population size | Births (natality) Immigration |
| Factors that decrease population size | Death (mortality) Emmigration |
| What is an open population | Living things can come and go, all 4 factors affect, |
| What is a closed population | Only 2 factors affect (birth/death) |
| What is carrying capacity | The maximum number of individuals an ecosystem can support , determined by living factors |
| What are limiting factors | Resources that limit the size to which a population can grow |
| Density independent factors | Typically abiotic |
| Density dependant factors | Typically biotic |
| Humans need nitrogen because its in our _____ and we get nitrogen from _____ | Humans need nitrogen because its in our BLOODSTREAM and we get nitrogen from FERTILIZER |
| What type of subatomic particle can move around | Electrons |
| Charging by contact | Charging by contact happens when a charged object touches a neutral object |
| Charging by friction | Objects of different matter are rubbed together producing a static net on each object |
| Charging by induction | A charged object can transfer a charge to a neutral object without touching it |
| Static electricity is caused by what | Buildup up charges that do not move |
| What is it called when electrons move/flow through materials? | Current electricity |
| What is a circuit and what does it do | System of electrical parts that work together to power something, allow us to move electricity around and control where its used |
| 5 major components of an electrical circuit | Wires, loads, energy source, control device, meters |
| What are wires used for | Transmit electricity between two devices of an electrical circle |
| What do loads do | Loads consume electrical energy and convert it into another form |
| What do fuses do | Breaks when too much electricity, creates a gap in the circuit |
| What do circuit breakers do | Automatic switch that opens if too much electricity |
| What are short circuits | Has complete path for electrons but they do not pass through a load |
| What is electric current | Flow rate of electrons passing through a wire |
| What is astronomy | The study of whats beyond earth |
| What is a shooting star | Meteor |
| Produce their own light , luminous | Stars |
| Non luminous, reflects light | Planets |
| Frozen core of ice, gas and dust, heats up and releases gas when close to the sun | Comet |
| Matter that burns as it enters earths atmosphere | Meteor |
| Small rocky body orbiting sun | Asteroid |
| What is a light year | The distance light travels in one year |
| Why is earth the perfect planet |
Created by:
Lekha