What do you call the type of solution that allows the light to pass through it?

Which system of the human body provides protection to most of the major organs?

What do you call the chemical process by which plant produces food?

What is the term for animals that has no backbone?

What is the study of earthquakes?

Which of the following devices is an example of a compound machine?

What do you call a material that is made up of only one type of atom an example of this is Hydrogen?

What is the most important function of the blood?

Mercury, Venus, Earth and Mars are the planets that are nearer to the Sun. What are these planets called?

To which of these galaxies do we belong?

Why do playground slides have smooth surfaces?

What do you call the growth of plants in response to the condition of the environment?

What do you call the root-like structure of kelps which helps it anchor to the ocean floor?

What are the little planets that are mostly found in a belt between Mars and Jupiter?

What planet is with the strongest wind?

What is the object that orbits a larger one?