Question : Which type of haploid unicellular eukaryote cell has a diameter of 10 micrometres, and about half of its volume is occupied by cup-shaped chloroplasts?

Option 1: Hydrodictyon

Option 2: Ulva

Option 3: Chlamydomonas

Option 4: Oedogonium

Question : What is the height of a cylinder that has the same volume and radius as a sphere of diameter 12 cm?

Option 1: 7 cm

Option 2: 10 cm

Option 3: 9 cm

Option 4: 8 cm

Question : The cup-shaped mouth of the volcano is

Option 1: focus

Option 2: epicentre

Option 3: crater

Option 4: cinder cone

Question : If water is frozen to become ice, its volume is increased by 10%, then if the ice is melted to water again, its volume will be decreased by:

Option 1: $9$%

Option 2: $9\frac{1}{11}$%

Option 3: $8$%

Option 4: $9\frac{1}{2}$%

Question : The amount of matter in a ball of steel is its:

Option 1: Weight

Option 2: Mass

Option 3: Density

Option 4: Volume

Question : What is the name of a type of waterfall with an enormous volume of water?

Option 1: Cascade

Option 2: Rapid

Option 3: Cataract

Option 4: Chute