A
Which star is closest to Earth?
The sun
What is the name of the layer of the atmosphere that contains the ozone layer ?
Stratosphere
What is the name of the smallest particle of an element that retains its properties?
Atom
A natural body that revolves in an orbit around a star is ______
A planet
The largest layer of Earth is _______
Mantle
When warm, moist air rises quickly and forms a rotating storm system over warm ocean water, it becomes __________
A hurricane
Which organelles are responsible for making protein ?
Ribosomes
Water seems to vanish from a wet towel left hanging on a warm day, but it doesn’t flow away. This slow loss of liquid is due to what process?
Evaporation
What is the name of the galaxy that contains our solar system?
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______ is a subatomic particle that determines the identity of an element.
Proton
What is called a movement of water across a semi-permeable membrane ?
Osmosis
What is the name of a weakened or dead form of a pathogen used to stimulate immunity ?
Vaccine
What is the name of the hormone that helps regulate sugar in the blood?
Insulin
What is the name of the process by which solids directly change to gas?
Sublimation
What type of galaxy contains our solar system ?
Spiral galaxy
Which type of solution has a pH of 2 ?
Strongly acidic
What is the name of the protein that red blood cells contain it that carries oxygen ?
Hemoglobin
A disorder caused by an extra chromosome 21 is called_______
Down syndrome
What is DNA stands for ?
Deoxyribonucleic acid
What is the name of the scientist that arranged elements by increasing atomic mass and properties ?
Demetri Mendeleev
What is the name of the energy that transferred due to temperature difference ?
Heat
What is the name of the explosion of a massive star at the end of its life ?
Supernova
Which type of vitamin mostly found in acidic fruits ?
Vitamin C
Which medical emergency produced from a blockage in coronary arteries ?
Heart attack