Science

• Density's formula: P = M/V (mass/volume)
• Prokaryote: bacteria
• Eukaryote: cells with nucleus, mitochondria, chloroplasts
• Cell wall: made up of cellulose, found outside the plasma membrane
• Lysosome: break down large molecules and digest waste products.
• Golgi body: modifies and packages protein for transport to other parts of the cell
• Endoplasmic recticulum: transport proteins from one part to the another parts of the cells
• euglena not animal/plant bcz lack of cell wall, has chloroplast, is heterotrophin without sunlight and has a flagella
• Vacuola: has cell sap and pushes cytoplasm against cell wall and maintains cell shape
• organism: multi, microorganism: uni
• root hair cells: to hold plants in place and absorb minerals from the soil
• palisade cell: main place of photosynthesis
• nerve cell: transmit electrical signal
• cilliated cell: push and move mucus from one place to another
• organ system: circulatory, nervous, digestive, respiratory, skeletal
• mixture: a combination of two or more substance that are not chemically combined
• heterogenous: cant be mixed
• homogeneous: can be mixed
• solute: dissolved by solvent
• solvent: dissolves the solute
• chemical properties: a property that is seen when a substance takes part in a chemical change.
• physical properties: the properties of a substance that can be observed without changing the substance
• conductor: allows heat to pass through it easily
• insulator: does not allow heat to pass through it easily
• stored energy: potential energy, moving energy: kinetic energy
• gravity is force between two objects that is due to their mass.
• The bigger the masses and the

  closer they are together, the bigger the attractive force between them
• a large

  gravitational pull that we call weight
• Friction is force between two surface that are

  pressed together.
• Air resistances : the force that acts to slow down an

  object moving through air.
• Current is a flow of charge in a circuit
• Electrical Conductors are substances that allow the flow of electrons (electric current)

  through them.
• reflected sound: echo
• substance sounds travel through is called medium
• Some surface absorb energy from the sound waves, so the reflected sound waves

  transfer less energy.
• sounds are made from vibrations
• The inner core is in the center and is

  the hottest part of the Earth. It is solid

  and made up of iron and nickel
• The outer core is the layer surrounding

  the inner core. It is a liquid layer, also

  made up of iron and nickel.
• The mantle is the thickest section of

  the Earth. The mantle is made up of

  semi-molten rock called magma.
• The crust is hard outer layer of the earth,

  made from rock.