chemical reaction
sound
light
health and lifestyle
periodic table
100

What is a synthesis reaction?

A chemical process in which two or more simple elements or compounds combine to form a more complex product.

100

What is a medium?

Sound travels through solid, liquid, or gas.

100

What is light?

The electromagnetic radiation with wavelengths between 380 and 750 nm which is visible to the human eye.

100

What is carbohydrate?

Sugar molecules

100

What is hydrogen?

A clean alternative to methane, also known as natural gas.

200

What is a decomposition reaction?

A reaction in which a compound breaks down into two or more simpler substances.

200

What is frequency?

The number of waves that pass a given point in one second.

200

What is an electromagnetic wave?

A form of radiation that travel though the universe.

200

What is vitamin D?

Build bones and keep them healthy.

200

What is neon?

Chemical element, inert gas of Group 18 (noble gases) of the periodic table, used in electric signs and fluorescent lamps.

300

What is a single replacement reaction?

A reaction in which one element is substituted for another element in a compound.

300

What is amplitude?

The maximum displacement or distance moved by a point on a vibrating body or wave measured from its equilibrium position.

300

What is the wavelength?

The distance between identical points, or adjacent crests, in the adjacent cycles of a waveform signal propagated in space or along a wire.

300

What are proteins?

A molecule made up of amino acids.

300

What is oxygen?

A chemical element with an atomic number of 8

400

What is a double replacement reaction?

Occur when parts of two ionic compounds are exchanged, making two new compounds.

400

What is a decibel (DB)?

A logarithmic unit used to measure sound level.

400

What is frequency?

How many wavelengths pass by a fixed point in one second.

400

What is water?

A transparent fluid which forms the world's streams, lakes, oceans and rain, and is the major constituent of the fluids of organisms.

400

What is iron?

A mineral that our bodies need for growth and development.

500

What is a combustion reaction?

When a substance reacts with oxygen and releases a huge amount of energy in the form of light and heat.

500

What is the speed of sound?

343 m/s.

500

What is the visible spectrum?

The segment of the electromagnetic spectrum that the human eye can view.

500

What are lipids?

Fatty compounds that perform a variety of functions in your body.

500

What is uranium?

Fuel for nuclear power plants and the nuclear reactors that run naval ships and submarines.