Science Test Study 2 Flashcards
Compounds are formed as a result of ______.
a chemical change
filtration
a physical change
evaporation
a chemical change
A molecule is the smallest part of _________.
a substance
an electron
a proton
an atom
a substance
A mixture of salt and water can be separated by _______.
freezing
filtering
melting
evaporating
evaporating
What are the products of cellular respiration?
H2O+CO2+energy
glucose+oxygen
glucose+H2O+energy
H2O+sunlight+CO2
water+carbon dioxide+energy
A mixture of oil and iron can be separated by _________.
filtration
evaporation
dissolving
magnetism
magnetism
Which of the following is a solution?
pure water
an oatmeal-raisin cookie
vinegar (3% Acetic Acid, 97% Water)
copper
vinegar (3% Acetic Acid, 97% Water)
When chlorine compounds are dissolved in pool water, what is water?
the alloy
the solvent
the solution
the solute
the solvent
A solid might become LESS soluble in a liquid when you decrease what?
particle size
pressure
temperature
container size
temperature
A solution is prepared by adding 100g of solid sodium hydroxide, NaOH, to 1,000 mL of water. What is the solid NaOH called?
solution
solute
solvent
mixture
solute
The starting substances that chemically bond in a chemical reaction are called _______.
catalysts
oxides
reactants
products
reactants
Substances formed as result of chemical reactions are ________.
catalysts
oxides
reactants
products
products
A _________ is a process in which new substances are formed.
chemical reaction
catalyst
reactant
subscript
chemical reaction
make sure the mass of the reactants and products are the same
To check whether an equation is balanced, ______
add the number of reactants to the number of products
count the number of each type of atom on each side
check to see if the reaction is endothermic or exothermic
count the number of each type of atom on each side
Raisins in cereal is an example of a ______.
homogeneous mixture
heterogeneous mixture
solvent
salt
heterogeneous mixture
Water at room temperature can hold less salt than if the water is ________.
hot
cold
cool
carbonated
hot
What are the products of photosynthesis?
glucose+sunlight+oxygen
glucose+sunlight+carbon dioxide
glucose+oxygen
glucose+carbon dioxide
glucose + oxygen
The bigger numbers found in front of a molecule indicating the number of molecules of that substance are called ___________.
compounds
subscripts
superscripts
coefficients
coefficients