Explanation

According to the World Health Organization (WHO), the industrial limit of sound in industries must be 75 dB (Decibels).

Explanation

There are three main scales used to measure temperature:

1. Celsius scale: Water freezes at 0°C and boils at 100°C.
2. Fahrenheit scale: Water freezes at 32°F and boils at 212°F.
3. Kelvin scale: Absolute zero (the theoretical minimum temperature) is 0K, and water freezes at 273.15K and boils at 373.15K.

Explanation

• Liquids can be converted into gases by heating, a process known as vaporization or evaporation.
• As the temperature increases, the particles of the liquid gain energy and move faster, eventually breaking free from the surface tension of the liquid and turning into a gas.

Explanation

• Carnivores are secondary consumers that eat primary consumers (herbivores).
• In this case, birds and mice are primary consumers (herbivores) that eat plants and plant products.
• Carnivores that eat birds and mice are secondary consumers.

Examples of carnivores that might eat birds and mice include:

• Hawks and owls (birds of prey)
• Foxes, wolves, and cats (mammals)
• Snakes and lizards (reptiles)

Explanation

• Marasmus is a severe form of protein-energy malnutrition that affects infants and young children.
• It leading to weight loss, wasting of fat and muscle, stunted growth, and developmental delays.

Explanation

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

• Milk and dairy products (cheese, yogurt)
• Egg shells
• Dark green vegetables (broccoli, kale, spinach)
• Small fish (salmon, sardines) and their bones
• Fortified foods (cereals, juices)

Calcium is crucial for:

• Building and maintaining strong bones and teeth
• Muscle function and contraction
• Nerve function and transmission
• Blood clotting and wound healing

Explanation

• The skin is the outermost layer of the body, covering and protecting the internal organs, muscles, and skeleton.
• It acts as a barrier against external damage, infection, and disease.
• It helps to regulate body temperature, aid in the production of vitamin D, and facilitate the senses of touch and feel.

Explanation

• A liquid is a state of matter that has a fixed volume but not a fixed shape.
• It takes the shape of its container and maintains its volume unless an external force is applied to change it.
• Solid: A solid has both a fixed shape and a fixed volume.
• Gas: A gas has neither a fixed shape nor a fixed volume. It expands to fill its container.

Explanation

• Frogs are heterotrophic animals that obtain energy by consuming other organisms, such as insects, worms, and even smaller frogs.
• They do not produce their own food like plants (producers) do, and they do not break down dead organisms like decomposers (such as bacteria and fungi) do.
• Therefore, the best description for a frog is a consumer.

Explanation

• Lung cancer is a disorder that occurs when cell division in the respiratory tract becomes uncontrolled.
• It leading to the formation of abnormal cells that can cause tumors and cysts.