The first challenge for the second graders will be to figure out the states of matter. Then, they will figure out how matter changes from one state to another. The second grade scientists will perform hands-on activities to discover those scientific ideas.

The second challenge for the second graders is:

As an engineer, your task is to build a solid vehicle that is powered by gas and carries a cargo of liquid as far as possible using the  materials provided to you.

Matter is anything that takes up space and has mass; everything around us is made of matter. The way the matter's molecules are placed determine what kind of matter it is.

States of Matter
States of matter are the different forms of matter; there are three that we will focus on: solid, liquid and gas.

Solid Solids have a definite shape; their size and shape remain the same and their molecules cannot move.

Liquid Liquids don't have a definite shape; they take the shape of their container and their molecules can move around.

Gas Gases do not have a definite shape and their molecules are free and move around very fast.


Energy is the ability to do work. Energy is how things move and change. It is all around us and takes many forms.

Potential Energy

Potential Energy is energy that is stored.

Kinetic Energy

Kinetic Energy is energy that is moving. It is also called energy of motion.


Friction is a force that slows things down when objects rub against each other. The rubbing causes items in motion to lose energy and then slow down or stop.


-Gravity is the force of attraction between two objects.


An engineer is a person who designs and builds products, machines, systems, or structures. Engineers want to know how and why things work. They have scientific training that they use to make practical things. Often, they are presented with a problem and design a way to solve that problem.

Click this link to view the phenomena displayed in the classroom

Click this link to view links that will extend your learning

Click here for the photo gallery for STEM '21

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