CHEMISTRY
7what is a physical change + physical properties
what is a chemical change + chemical properties
physical change = a change in form/reversible, colour, texture, smell
chemical change = produce a new substance/irreversibile, flammability, corrosion,
what is mitosis
cell division allows
whats the name of the point where rays meet after passing thru converging lens
focal point
different between weather and climate
weather is day to day conditions of the atmosphere, climate is the average pattern of weather over a long period of time for a specific region
wht is the iris
iris controls how much light enters the eye by adjusting the size of the pupil
What is the name of the reaction where an acid and a base combine to form water and a salt
neutralization
what stem cell can become any type of body cell
TRUE OR FALSE** less dense material to more dense material bends away from normal (air into water)
FALSE** it bends towards normal
what is the greenhouse effect
natural process when certain gases trap heat from the sun
define the red eye effect
happens when a flash reflect off the back of your eye, the retina is full of blood vessels so the reflecting light looks red
what is an ionic compound
BONUS** NaCl
compound made of metal and non metal
BONUS** Sodium Chloride
what plant tissue transports water from roots to entire plant
xylem
state the law of reflection
angle of incidence = angle of reflection
all rays lie in the same plane
people/scientists study these patterns in three trunks to learn about the trees age and past climate conditions
BONUS** what does each ring represent
BONUS** one year of growth
which lense helps myopia + which helps hyperopia
myopia (near-sighted) - diverging lens
hyperopia (far-sighted) - converging lens
formula and the name for the polyatomic compounds
Iron (lll) hydroxide
Formula: Fe(OH)3
Name: Iron (lll) hydroxide
main function of ribosomes
to make proteins
name the force that opposes the motion of objects sliding past each other
what is friction
name two major greenhouse gasses release that contribute to global warming
what are carbon dioxide and methane
name the two types of photo receptor cells in the retina and their main functions
rods - detect light and dark
cones - detect color
indicators that a substance is a base (what determines its a base)
litmus - blue
bitter
conducts electricity
phenolphthalein - pink
this organ is responsible for filtering waste from the blood and produces urine
kidneys
electromagnetic spectrum MOST TO LEAST**
gamma, xray, UV, visible spectrum, IR, microwave, radio wave
this term describes the measure of how much sunlight a surface reflects back into space
what is albedo
name the clear, curved structure at the front of the eye that helps focus light onto the retina
what is the cornea