Science Knowledge Challenge

What is the chemical reaction represented by the word equation: Hydrogen + Oxygen -> Water?

• Neutralization reaction

• Synthesis reaction

• Combustion reaction

• Decomposition reaction

Give an example of a base and an acid commonly found in households.

• Coffee and sugar

• Ammonia and bleach

• Lemon juice and salt

• Baking soda (sodium bicarbonate) and vinegar (acetic acid)

Name three essential nutrients required for human nutrition.

• Water

• Minerals

• Vitamins

• Carbohydrates, Proteins, Fats

Describe the structure of a plant cell and its main functions.

• A plant cell consists of a cell wall, cell membrane, nucleus, and endoplasmic reticulum. The main functions are support, selective permeability, genetic material storage, and lipid synthesis.

• The structure of a plant cell includes a cell wall, cell membrane, cytoplasm, nucleus, chloroplasts, and vacuoles. The main functions are support, selective permeability, cellular activities, genetic material storage, photosynthesis, and water/nutrient storage.

• Plant cells have a cell membrane, cytoplasm, nucleus, and lysosomes. The main functions are selective permeability, cellular activities, genetic material storage, and waste breakdown.

• The structure of a plant cell includes a cell wall, mitochondria, nucleus, and ribosomes. The main functions are support, energy production, genetic material storage, and protein synthesis.

What are the components of a human cell and their respective functions?

• flagella

• chloroplast

• peroxisome

• cilia

• Nucleus, cytoplasm, cell membrane, mitochondria, endoplasmic reticulum, Golgi apparatus, lysosomes, ribosomes

List and explain the different types of rainfall based on their characteristics.

• Warm, cold, dry

• Tropical, monsoonal, thunderstorm

• Polar, equatorial, subtropical

• Convectional, frontal, orographic, and cyclonic