Studied by 2 peopleWhat is the smallest unit of an element that still has properties of that element?
Atom
Vinegar is classified as
Molecule
Copper is classified as
Element
Which category contains the majority of elements on the periodic table?
Metals
Compounds are formed from
A chemical reaction
The most reactive group of elements are
Group 1 alkali metals
The second most reactive group of elements are
Group 17. The halogens
The least reactive elements are
Group 18 the noble gases
Chlorine has seven electrons and its valence shell. What atom will it react with?
Sodium with one valence electron
The law of conservation of matter, states that
Matter cannot be created or destroyed
200 g of a substance is combined with 20 g of a different substance. A small amount of gas is released. What is the final mass of the products of the gas is trapped in a container.
220
Rusting is a property related to
Chemical reactivity
What provides evidence of a chemical change has occurred
A liquid changes to a gas and heat is released
What does the bold line on the right side of the periodic table separate
Metals from nonmetals
Physical changes include
Density changes
Chemical changes include
A precipitate forms
An atom is composed, primarily of a specific combination of which three particles
Protons, neutrons and electrons
An atom of the element helium in outer space has the same combination of electrons and protons as that of an atom of helium on earth
True
A boron atom contains five protons. We assume the atom to be neutral. How many electrons must it have?
Five
A calcium atom contains 20 electrons we assume the atom to be neutral how many protons must it have?
20
Evaporation
Liquid change into a gas
Transpiration
Plants changing liquid into a gas
Condensation
Gas changing into a liquid
Precipitation
Condensation returning to earth
Runoff
Uncontrolled runoff results in floods, controlled runoff results in ground, water, increasing for wells
Infiltration
Precipitation entering soil to replace ground water
What is nitrogen fixing and why is it important?
Our bodies need nitrogen for DNA and muscle tissue
Auto trophs
Make their own food
Plants
Autotrophs, perform photosynthesis, essential, and nitrogen fixing
photosynthesis
Process where plants make their own food
Oxygen
Element necessary for cellular respiration, to use ATP for muscle movement
Carbon dioxide
What plants use for photosynthesis, this gas given off during cellular respiration
Heterotrophs
Need to eat food for cellular respiration
Cellular respiration
Process where cells use nutrients for muscle movement
weathering
Break down of rock into carbon and other elements
Sedimentation
Gathering of carbon and other elements to create carbon sinks
Subduction
An oceanic plate, moving under a continental plate, and releasing carbon slowly
Volcanic eruption‘s
Immediate release of carbon into the atmosphere
Tectonic plates
Earths crustal plates, moving around each other to release carbon
Carbon sinks
Decompensated, prehistoric animals that have fossilized into huge amounts of carbon
The flow of matter is recyclable through an ecosystem, the flow of energy is not
True
Nutrients travel through an ecosystem through food webs
True
If there were no decomposers, we would be surrounded by dead stuff and would have no nitrogen for DNA or muscle growth
True
Producers
Make food from sunshine
Consumers
Need to eat food
Decomposers
Turn that stuff into useful soil, especially nitrogen
Coexistence
Two organisms living in the same area, creating no harm to each other
Cooperation
Mutually beneficial interactions that occur among individuals of the same species or between different species
Competition
Predator and prey
Parasitism
One organism, taking from other without giving back
Mutualism
A situation where all organisms involved benefit from living together
Note
Flashcard