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