Biology
which visible light is less effective for the photosynthesis
green
Which element is used in atomic clocks and lasers?
Cesium
A sealed balloon is heated. What happens to its volume?
Increases
This organ is only about 2% of your body weight but uses about 20% of your energy.
The brain
This Asian country has the world’s fastest aging population, with more diapers sold for seniors than for babies
Japan
which plant tissue contains cells that divide rapidly
Meristematic tissue
Which hydrocarbon is used to ripen fruits?
Ethene (C2H4)
What do we call the amount of heat needed to raise the temperature of 1 kg of a substance by 1°C?
Specific heat capacity
What organ produces bile?
Liver
What is the largest desert on Earth?
Antarctic Desert
Which organelle synthesizes lipids in a cell?
Smooth Endoplasmic reticullum (Reticulul endoplasmic neted)
What polymer is formed from vinyl chloride?
PVC (polyvinyl chloride)
You heat two identical metal blocks: Block A from 10°C to 20°C and Block B from 90°C to 100°C. Which requires more heat?
Both require the same amount
What is the main function of the large intestine?
Water absorption
This country has the largest number of active volcanoes of any nation on Earth.
Indonesia
What is the primary source of a plant mass?
Carbon dioxide (CO2)
Which toxic gas is produced during incomplete combustion of hydrocarbons?
Carbon monoxide (CO)
An ice cube melts at 0°C without changing temperature. Where is the heat energy going?
Breaking intermolecular bonds /latent heat
This is the only type of human cell that completely lacks a nucleus once mature
Red blood cells
Chemical symbol for the element with 26 protons.
Iron (Fe)
which mammal do not have stomach
platypus
Which hydrocarbon is used in aerosol sprays?
Butane
Two gases (A and B) at the same temperature have different average speeds. What must be different about A and B?
Their molecular masses
What is the smallest bone in human body?
the stapes (scăriță)
What is the main component of the sun?
Hydrogen