Explanation

• The revolution of the Earth around the Sun causes the changing seasons, including Summer and Winter.
• As the Earth's axis is tilted and different parts of the planet receive varying amounts of sunlight throughout the year.

Explanation

• The correct answer is: Simple machines magnify the force you use.
• This statement is true for many simple machines, such as levers, pulleys, and wheel and axle systems.
• Which are designed to multiply the force you apply, making it easier to lift, move, or apply force to an object.

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

• Both animal and plant bodies contain a significant percentage of water.
• 70% is a commonly cited estimate for many living organisms.

Explanation

An odometer or odograph is an instrument

for measuring the distance travelled by a vehicle.

Explanation

• Bases are substances that exhibit a soapy or slippery texture.
• They are often characterized by their ability to form hydroxide ions (OH-) in aqueous solutions.

Explanation

• Carbon dioxide (CO2) is produced when trees and fossil fuels are burned, through a process called combustion.
• Combustion releases carbon dioxide and water vapor into the atmosphere.

Explanation

A nucleotide, the building block of DNA and RNA, consists of three components:

1. A phosphate group (phosphate)
2. A sugar molecule (deoxyribose in DNA and ribose in RNA)
3. One of four nitrogenous bases (Adenine, Guanine, Cytosine, and Thymine in DNA; Adenine, Guanine, Cytosine, and Uracil in RNA)

Explanation

•  Sun has a temperature of around 6,000 °C and glows orange/yellow.
• This color is due to the blackbody radiation emitted by the Sun at this temperature, which peaks in the visible spectrum around yellow.