Question

q4. materials with a lower density than water (float or sink) when you put them in water. float sink q5. warm water has smaller density than cold water because warm particles take up more space warm particles slow down warm particles shrinks warm temperature reduce the number of particles

Explanation:

For Q4, objects with lower density than water displace a weight of water equal to their own weight and float due to buoyancy principle. For Q5, when water is heated, particles gain kinetic energy and move more, taking up more space, thus reducing density.

Answer:

Q4. A. float
Q5. A. warm particles take up more space