Unusually long period of low or no rainfall, causing water shortages
drought
A type of rock that contains minerals that can be magnetised. Movement of these rocks is a strong evident of plate tectonic movement.
basalt
A device used to view oscillations of waves
oscilloscope
Movement of heated liquid particles rising upwards and particles that are cooling falling downwards
convection current
Organelle where photosynthesis happen
chloroplast
This is what happens when two or more waves meet and their effects are added together
interference
Frequency is measured in (unit)
hertz
Amplitude is measured in (unit)
meter
supercontinent on Earth that broke apart about 175 million years ago
Pangea
Compressed remains of dead organisms that can be burned to release energy including methane (natural gas), coal and oil.
fossil fuels
Layer of the earth that is not a runny liquid like water that can flow slowly and make the tectonic plates move
mantle
The lowest point of a wave
trough
Plants acts as a natural way of storing carbon dioxide. They are called ______
sink
It depends on the sound wave’s energy and tells the loudness or quietness of a sound
amplitude
High frequency waves have _______________ wavelength
short
A plant that lived on Pangea but became extinct over 175 million years ago; fossils found today provide evidence for plate movement.
glossopteris
Large fires in natural areas, which spread quickly due to dry and dead plants, often made worse in a drought
wild fires
Organelle where respiration happen
mitochondria
The burning of materials to produce carbon dioxide and water
combustion
The highest point of a wave
crest