Physical Properties of Matter

Explain how aquatic plants and animals breathe underwater?

Which of the following dissolved gases is not used by aquatic animals?

Natural water contains dissolved gases such as oxygen, nitrogen and carbon monoxide.

Natural water contains dissolved gases such as oxygen, nitrogen and carbon _____.

Describe the importance of gases dissolved in water.

Which one of the following statement is correct in respect of fluids?

Name one device by which the following quantity is measured. (Cylinder / Thermometer)

• Capacity

Liquids retain their shape and size.

Fill in the blank by choosing the correct word given in the bracket.

Scientists say that there are actually five states of matter: Solid, liquid, gas, _____ (plasma / colloid) and Bose-Einstein Condensate (BEC).

Find the density of an unknown liquid in a beaker. The beaker's mass is$268 \mathrm{g}$when there is no liquid present in it. With the unknown liquid, the total mass is $390 \mathrm{g}.$ The volume of the unknown liquid is $145 \mathrm{ml}.$

What do you understand by the term compressibility?

Solids cannot be compressed.

Which of the following has fixed volume but not fixed shape?

Which of the following can flow?

Which of the following is fluid?

Under high pressure conditions gases can be dissolved in liquids.