Science Topics

What is the process by which plants convert light energy into chemical energy?

• Photosynthesis

• Chloroplast

• Respiration

• Hydrolysis

What is the flow of electric charge called?

• electric flow

• charge stream

• power wave

• electric current

In which type of reaction do two or more substances combine to form a new compound?

• Combustion reaction

• Synthesis reaction

• Decomposition reaction

• Single displacement reaction

What are the three main layers of the Earth?

• crust, mantle, core

• mantle, crust, inner core

• crust, core, atmosphere

• lithosphere, asthenosphere, outer core

Which layer of the Earth is the hottest and made up of solid iron and nickel?

• Mantle

• Outer core

• Crust

• Inner core