Pure substances
H20 Element, compound, or mixture?
compound
Charge of protons
positive
Formula for density
Density = mass/volume
What is the #1 pollutant of water?
sediment/eroded soil
What would happen in an ecosystem if there was a decrease in producers?
Consumers would suffer/die/leave
H2O + NaCl
Element, compound, or mixture?
Mixture
Charge of electrons
negative
What is the density of an item that has a mass of 15g and 5 ml?
D = 3g/ml
Pollutants from fertilizers
Nitrates
Make their own food
Heterogeneous or Homogeneous/solution?
H2O + NaCl
Homogeneous/solution (the same throughout)
Group in which noble gases are in (group #)
18
List the substances from LEAST dense to MOST dense:
water, 90% rubbing alcohol, syrup
alcohol, water, syrup
Name 3 effects of increased nitrates in water.
Increased temp, increased algae, increased turbidity, decreased dissolved oxygen, increased CO2
What is the overlapping of food chains called?
food web
Carbon
Element, compound, or mixture?
Element
Name of the most unstable group of elements.
Alkali
What is the density of water?
1g/ml
The name of the land that all drains into a central water source.
water shed
fungi-
producers, consumers, or decomposers?
decomposers
Tossed salad
Heterogeneous, homogeneous, or compound?
Heterogeneous mixture (not evenly distributed)
Electrons are "happy" and stable at what number?
8 is great!
Oil and vinegar are what type of mixture?
Homogeneous- they separate
Place where a river meets the ocean
estuary
The number one source of energy for all heterotrophs- give the "technical" name
producers