Something that is in nature and is not made by people.
natural
The material trees are made of.
wood
The way you will solve a problem.
plan
An answer to a problem.
solution
_________ is the hard material that forms the surface of the Earth.
rock
A material made by people that can be hard or soft.
plastic
What something is made of. Wood is a good _________ for a house.
material
The use of science to help solve problems.
technology
People who use technology to make discoveries about the world.
scientists
The material made from the white hair of the _________.
cotton
A question you want to find an answer to.
problem
Knowledge about the world, especially from looking and testing.
science
Something you want to do.
goal