Biology
Chemistry
Earth Science
Environmental
Physical
100
Horn-like projections formed on flowers.
What is a thorn
100
Positively charged particles forming part of atomic nuclei.
What is proton
100
A storm that produces lightning and thunder and often heavy rain and strong wind.
What is a thunderstorm
100
For your convenience, local time in most countries is defined to have the same value in a broad strip, typically15 degrees wide in longitude.
What is Time Zone
100
The gravitational force exerted on a mass. Hey look down at the scale.
What is weight
200
A surface made of thin material. clams outer membrane
What is a shell
200
The substances produced in a chemical reaction.
What is products
200
The lowest layer of the atmosphere, in which weather processes take place.
What is Troposphere
200
The surface layer of earth where plants grow.
What is soil
200
THis is the chemical a plant breathe out.
What is carbon dioxide
300
The conversion of water and carbon-dioxide by plants into glucose and oxygen. Light is used as an energy source.
What is photosynthesis
300
Energy stored in the set-up of a mechanical system by a weight able to descend, or by a compressed spring.
What is potential energy
300
The sixth planet out from the Sun, famous for its ring system.
What is Saturn
300
To process and reuse materials.
What is to recycle
300
The spontaneous release of energy from atomic nuclei.
What is radioactivity
400
Organelle containing the chromosomes. That part of an atom containing the protons and neutrons.
What is a nucleus
400
The regions of mountain-building earthquakes and volcanoes which surround the Pacific Ocean.
What is Ring of Fire
400
Usually the coldest regions on a planet, being the areas around an axis through the planet perpendicular to the plane of rotation about the Sun.
What is a pole
400
A chemical element, symbol N, with atomic number 14
What is nitrogen
500
To shed the hair, feathers, skin, or shell and grow a new covering.
What is molt
500
A group of atoms bonded together. It is the smallest part of a substance that retains the chemical properties of the whole
What is molecule
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