Which one of the following is a light source?

Nat placed an object in front of a wall and shone a torch on it to form a shadow as shown.

At which position should Nat place the torch so that the largest shadow can be formed on the wall?

Object X was attracted to a magnet as shown in the diagram.

Object X is made of ____________________.

A boy is running. Which two body systems work together to help him move his body parts?

Ming filled a cup to the brim. He gently lowered a marble into the cup as shown and found that some water flowing out of the cup.

This shows that the marble ___________________.

Ali took out a jar from the refrigerator and had difficulties taking out the cover of the jar. What could Ali do to take out the cover?

What is one similarity between a fungi and a non-flowering plant?

Lynn poured some hot water into a styrofoam cup as shown in the diagram. She is able to hold the cup because styrofoam is a _______________________.

Referring to the diagram,

the hot milk in the cup (i)_______ heat to the cold water in the basin.

The cold water in the basin (ii)________ heat from the hot milk in the cup.

Heat travels from a (i) ___________ region to a (ii) ___________ region until both reach the same temperature.

A good conductor of heat gains heat and loses heat (i)___________.

A poor conductor of heat gains heat and loses heat (ii)___________.