Plant Biology
What are the reactants for photosythesis?
water, oxygen and carbon dioxide
what does the period show in the periodic table?
how many electron shells are there in an element
Which type of reaction gives off heat?
Exothermic
What is the unit of heat energy?
Joules(J)
which body part for the excretory system helps store urine?
Urinary bladder
name three factors that factor the rate of transpiration
temperature,humidity,air movement,light intensity.
metal+oxygen-------------->
metal oxide
what is the difference between covalent and ionic bonding?
In covalent bonding the electrons gets shared, but in ionic bonds electrons get transferred.
Does high humidity increase or decrease the rate of transpiration?
decrease
What does amplitude represent?
loudness
_________ is the vascular tissue that supplies glucose to the other parts of the plant.
phloem
N2+ _H2➔ _NH3
N2 + 3H2 ➔ 2NH3
What is formed when a base reacts with an acid
salt and water
Is melting ice exothermic or endothermic?
endothermic
what is the formula for density?
mass/volume
name the layer under the waxy cuticle
upper epidermis
which is more reactive?
sodium or potassium
potassium
What does the atomic number tell you?
the number of protons.
What affects the pitch of a sound?
frequency
What happens to carbon when animals die?
decomposition
which vascular bundle is made of dead cells?
Xylem
CaCO2+ 2HCl-------->
CaCl2 + CO2+ H2O
What is the charge on a chloride ion
-1
What travels faster: sound in air or water?
water
Why do atoms become ions?
to get a full outer shell and become stable