GRADE 10 ITEST

The following are nutrient that can be cycled except?

• Carbon

• Petrol

• Water

• Oxygen

Both plants and animals respire putting........... back into the atmosphere.

• Oxygen

• Carbon dioxide

• Glucose

• Nitrogen

The process of a plant splitting into two identical daughter cells is called...

• Binary Fussion

• Binary Fission

• Regeneration

• Grafting

The process plant use to make their food is called

• Photolysis

• Nuclear reaction

• Photosynthesis

• Budding

Carbon from dead plants and animals can end up as ............. fuels

• Fossil

• Rocks

• Water

• Petrol

............. process of burning releases carbon to the atmosphere

• Photosynthesis

• Respiration

• Combustion

• Photolysis

Dead plants and animals releases carbon back to the atmosphere through the help of.......

• Decomposers

• Viruses

• Protozoa

• Spirogyra

The following are importance of carbon in nature except

• Plant uses carbon dioxide obtained from the air to manufacture their food

• It provides Carbon which is the major building block of all organic matter

• It helps to purify the atmosphere

• it doesn’t help to maintain the atmospheric level of carbon and oxygen

Th percentage of oxygen in the atmosphere is.......

• 21%

• 0%

• 5%

• 11%

The following are processes that add carbon to the atmosphere except

• Combustion

• Respiration

• Decomposition of dead and decaying organisms

• Photosynthesis