Explanation

• When you put a drop of ink into water, the molecules of ink are in random motion due to their kinetic energy.
• As they collide with the surrounding water molecules, they transfer their energy and momentum, causing the ink molecules to spread out and move throughout the glass.
• This process is known as diffusion.

Explanation

• Fruits are organic materials that are easily decomposed by decomposers such as bacteria, fungi, and other microorganisms.
• They are a natural part of the nutrient cycle and can break down quickly in the environment.

The examples of biodegradable materials such as:

• Organic waste (kitchen waste, human waste, food waste, manure)
• Plant material (tree leaves, grass, wood, paper, cotton)
• Animal products (leather, feathers, dead animals)
• Food and food waste (fruits, vegetables, leftover food)
• Dead organic matter (dead plants, dead organisms)

Explanation

• The optimal temperature range for seed germination varies among plant species, but most seeds germinate best between 16°C to 24°C (61°F to 75°F).
• This temperature range allows for optimal metabolic activity, water uptake, and enzyme activation, facilitating seedling emergence and growth.

Explanation

• Cold-blooded vertebrates are animals that take on the temperature of their surroundings.
• They are also known as ectothermic vertebrates.
• Their body temperature is regulated by the environment around them, and they often bask in the sun or seek shade to control their body temperature.
• Examples: fish, amphibians, and reptiles.

Explanation

• Iron is a ferromagnetic material, which means it is strongly attracted to magnets.
• Therefore, an iron kettle will be attracted to a magnet.

Explanation

In 1969, Whittaker proposed a system of classification that divided all living organisms into five kingdoms:

1. Monera (bacteria and cyanobacteria)
2. Protista (protozoa, algae, and slime molds)
3. Fungi (mushrooms, molds, and yeasts)
4. Plantae (plants)
5. Animalia (animals)

Explanation

• As temperature increases, the heat energy of a substance also increases.
• This is because temperature is a measure of the average kinetic energy of the particles in a substance, and as temperature increases, the particles gain kinetic energy and therefore heat energy.

Explanation

• Marasmus is a severe form of protein-energy malnutrition that affects infants and young children, typically under the age of 5.
• It is characterized by wasting of fat and muscle, stunted growth, and developmental delays.

Explanation

Copper is an essential mineral found in various foods, including:

• Whole wheat
• Bananas
• Peas
• Prunes
• Oysters
• Liver
• Kidney
• Grains (quinoa, brown rice)
• Legumes (lentils, chickpeas)

Copper is Crucial for:

• Formation of red blood cells.
• Helps with the functioning of the nervous system.

Note: According to Sindh Textbook Board, Jamshoro

Explanation

• Peanuts are a legume and a good source of protein, containing about 20.5 grams of protein per 100 grams.
• Apples: 0.3 grams of protein per medium-sized fruit
• Watermelon: 0.6 grams of protein per cup
• Mango: 1.4 grams of protein per cup