Thermal Expansion and Contraction Experiment Material Large Solid Body Expansion Physics Science Education Instrument Primary School Science Demonstration Object Solid Expansion

First, use:The experimental materials are used for the primary school science group experiments, and the experiments demonstrate the phenomenon of thermal expansion and contraction of metallic and non-metallic objects.Second, maintenance and preservation:1. After use, apply to the surface of the metal ball to avoid oxidation and rust.2. Store in a cool dry place to avoid aging.

• First, use:
• The experimental materials are used for the primary school science group experiments, and the experiments demonstrate the phenomenon of thermal expansion and contraction of metallic and non-metallic objects.
• Second, maintenance and preservation:
• 1. After use, apply to the surface of the metal ball to avoid oxidation and rust.
• 2. Store in a cool dry place to avoid aging.