STEM Playground 2025

Hi students,

Our school has been registered for STEM Playground 2025.

Challenge 1, A pH-antom Ship! is now open!!!

1. Student(s) will take a short video recording of themselves successfully completing the challenge.

2. Student(s) to submit the video file to Mr. Gan using the link below by 31 March 2025.

3. You can perform the challenge individually , in a pair or a group of 3.

https://forms.gle/pZ5dhE9pLyFAUfdFA

Here is an opportunity to showcase your knowledge in both Chemistry and Physics in the areas of ...

Chemical Calculations

o Interpret chemical equations with state symbols.

o Construct chemical equations, with state symbols, including ionic equations.

Acid-Base Chemistry

o Describe the characteristic properties of acids as in reactions with metals, bases and carbonates to form salts.

Qualitative Analysis

o describe tests to identify the following gases: ammonia (using damp red litmus paper);

carbon dioxide (using limewater); chlorine (using damp litmus paper);

hydrogen (using a burning splint); oxygen (using a glowing splint) and sulfur dioxide (using acidified potassium manganate(VII)).

Physics

Dynamics

o identify and distinguish between contact forces (e.g. friction, air resistance, tension and normal force) and non-contact forces (e.g. gravitational, electrostatic and magnetic forces)

o apply Newton's Laws to:

§ describe the effect of balanced and unbalanced forces on a body

§ describe the ways in which a force may change the motion of a body

§ identify action-reaction pairs acting on two interacting bodies (stating of Newton's Laws is not required)

o identify forces acting on a body and draw free body diagram(s) representing the forces acting on the body (for cases involving forces acting in at most two dimensions)

Energy

o show an understanding that there are energy stores, e.g. kinetic, potential (gravitational, chemical, elastic), nuclear and internal, and that energy can be transferred from one store to another:

§ Mechanically (by a force acting over a distance)

o state the principle of the conservation of energy and apply the principle to new situations or to solve