Explanation

• Solids like sawdust float on water because they are less dense than water.
• When sawdust is added to water, it forms a heterogeneous mixture.
• Where the sawdust particles remain separate from the water and float on the surface.

Explanation

• Animals, plants, human beings, and microorganisms are all examples of living components and biotic factors.
• Living components refer to the living organisms that make up an ecosystem or environment.
• Biotic factors refer to the living components of an ecosystem that interact with each other and their environment.

Explanation

Vitamin C deficiency can cause:

Scurvy, a disease characterized by:

• Fatigue and weakness
• Bleeding gums and loose teeth
• Joint pain and swelling
  
• Poor wound healing

Explanation

The skin is sensitive to:

• Temperature (hot and cold)
• Touch (light and heavy pressure)
• Pressure (firm and gentle)
• Pain (sharp and dull)

Explanation

To find the speed, we can use the formula:

Speed = Distance / Time

Given:

Distance = 150 meters

Time = 5 seconds

Speed = 150 / 5

Speed = 30 m/s

So, the cycling speed of the girl is 30 meters per second.

Explanation

• A solid is a state of matter that has a fixed shape and a fixed volume.
• Solids maintain their shape and volume unless an external force is applied to change them.
• Liquid: A liquid has a fixed volume but takes the shape of its container.
• Gas: A gas has neither a fixed shape nor a fixed volume. It expands to fill its container.

Explanation

Sheep and birds are primary consumers because they eat plants and plant products, such as grass, leaves, seeds, and fruits.

Explanation

A deficiency of sodium can lead to imbalances in fluid volume in the vessels and tissues, resulting in conditions such as:

• Hyponatremia (low sodium levels in the blood)
• Fluid retention and swelling
• Edema (excess fluid in tissues)

Explanation

• The larval stage of a frog is known as Tadpoles.
• This stage is characterized by a aquatic, fish-like body, with gills for breathing and a tail for swimming.

Explanation

• A species is a group of living organisms that share common characteristics, can interbreed, and produce fertile offspring.
• A particular group of animals or plants that belong together and have some similar quality.