Explanation

• When oil is burnt, it undergoes combustion, a chemical reaction that releases energy in the form of heat and light.
• It produces carbon dioxide (CO2) and water (H2O) as byproducts.
• The energy released can be used to power vehicles, generate electricity, or provide warmth.

Explanation

• Photosynthesis is the process by which plants, algae, and some bacteria.
• It convert light energy from the sun into chemical energy in the form of glucose (sugar), using carbon dioxide and water as reactants.

Explanation

• Solar power is a renewable energy source that generates electricity from sunlight.
• It does not emit carbon dioxide (CO2) or any other greenhouse gases.

The sources of carbon dioxide emissions:

• Burning of fossil fuels (such as coal, oil, and natural gas) releases CO2 into the atmosphere.
• Burning wood (such as in fireplaces or woodstoves) also releases CO2.
• Respiration (the process by which living organisms breathe) releases CO2 as a byproduct.
• Car exhaust smoke (from internal combustion engines) contains CO2, as well as other pollutants.

Explanation

• Small Vacuole because plant cells typically have a large central vacuole, not small vacuoles.

The components of a plant cell:

• Cell wall
• Cell membrane
• Cytoplasm
• Large vacuole
• Nucleus
• Chromosomes
• Chloroplast

Explanation

• A movable pulley is a type of pulley system where the pulley is free to move along the rope or cable.
• This allows the force applied to the rope to be multiplied, making it easier to lift or move heavy loads.
• Movable pulleys are commonly used in cranes, winches, and other lifting machines.

Explanation

• Distillation is a process that involves boiling the seawater and then collecting the condensed steam, which is free from salt and other impurities, resulting in fresh drinking water.
• This process is commonly used in desalination plants to produce drinking water from seawater.

Explanation

• Photosynthesis requires two main materials: Water (H2O) and Carbon Dioxide (CO2), in addition to Light Energy.
• Water is the source of hydrogen atoms, which are used to synthesize glucose and other organic compounds.
• While Carbon Dioxide provides the carbon atoms.

Explanation

• Chlorophyll is a green pigment found in plants, algae, and cyanobacteria that plays a crucial role in photosynthesis.
• It traps sunlight and uses the energy to convert carbon dioxide and water into glucose and oxygen.

Explanation

• Security mirrors are typically convex mirrors.

The examples of concave mirrors:

• Cosmetic mirrors (makeup mirrors)
• Dentist mirrors
• Car headlight mirrors

Explanation

• A Kaleidoscope is an optical instrument that uses mirrors and glass fragments.
• It used to create multiple images of an object, creating a colorful and symmetrical pattern.