Explanation

• Vegetable waste from farms is an example of biodegradable waste.
• Which can be broken down naturally by decomposers such as bacteria, fungi, and other microorganisms.

Explanation

Land pollution is caused by:

• Plastic bags, bottles, glass bottles, tin cans
• Vegetables and fruit cutting
• Animal wastes

Explanation

• Comets are often referred to as "dirty snowballs" due to their composition.
• Comets are characterized by their highly elliptical orbits and bright tails of gas and dust that form when they approach the Sun.

Explanation

• Our sun is one of the billions of stars in the Milky Way galaxy.
• The Milky Way is estimated to contain between 200-400 billion stars.

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

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

• The freezing point of water (0°C or 32°F) is the same as its melting point.
• Which is the temperature at which water will freeze or melt.