Biology
What is the basic unit of life?
The cell
What is the chemical symbol for sodium?
Na
What organ pumps blood through the body?
the heart
What is the green pigment in plants called?
chlorophyll
Name one renewable energy source.
Solar, wind, hydro, geothermal (any one)
What part of the cell controls what enters and leaves?
Cell membrane
What is formed when an acid reacts with a base?
Salt and Water
What cells has the function to fight off infections?
White Blood Cells
What part of the eye controls the amount of light entering?
Iris
The breaking down of rocks by natural forces
weathering
What is the main function of the xylem in plants?
To transport water
What is the pH range of acids?
0-6
This organ transfers oxygen, nutrients, and antibodies to the fetus; removes waste; acts as a barrier and endocrine organ.
The placenta
Identify one difference between aerobic and anaerobic respiration.
Aerobic uses oxygen, produces more energy, occurs in mitochondria; anaerobic doesn’t use oxygen, produces less energy, occurs in cytoplasm.
hydraulic action, abrasion, attrition, and corrosion
Which enzyme breaks down starch into maltose?
Amylase
What is the molar mass of H2O?
18g
This process ensures that gametes receive half the number of chromosomes for fusion during fertilization.
meiosis
Name four processes in the hydrological cycle
evaporation, transpiration, condensation, precipitation, percolation/ run-off/ groundwater
Name two features you may find in the upper course of the river.
v-shaped valley, waterfalls, gorges, rapids, potholes
Give the full chemical equation of photosynthesis.
6H2O + 6CO2 --> 6O2 + C6H12O6
1 mole of any gas at rtp occupies a volume of ____.
24dm3 / 24000cm3
Name three effects of cigarette smoking on the human respiratory system.
cilia damage, cancer of the tract, mucus build up, smoker's cough, alveolar damage, reduced oxygen transport
Name five body systems.
circulatory, skeletal, respiratory, digestive, excretory, nervous, muscular, endocrine, immune, integumentary, reproductive
When is the on-season of the tourism sector in the Caribbean?
December- April