Question

A substance
and ______ dense than water will sink.

______ and ______are gases which dissolve in water.
Umbrellas are made of______
materials.​

Answer 1

Answer:

1.an object weighs more than an equal volume of water, it is more dense and will sink, and if it weighs less than an equal volume of water, it is less dense and will float.

2.oxygen and carbon dioxide.

oxygen and carbon dioxide gases are present in dissolved state in natural water.

3.Once made from cane or whale bone, the shaft of a modern umbrella is now made from either fibreglass, wood, steel or aluminium. Each material has its own advantages. Fibreglass won't rot or corrode and is extremely robust.

Explanation:

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