Explanation

• Carbon dating is used to estimate the age of fossils.
• Those that are less than 60,000 years old.
• It is composed of organic materials like wood or leather.

Explanation

Hydrocarbon compounds are typically derived from fossil fuels and consist of hydrogen and carbon atoms.

Examples include fuels like gasoline, natural gas, and propane, as well as waxes like candle wax and paraffin wax.

Explanation

Fertilizers are substances added to soil to provide essential nutrients for plant growth, making up for any deficiencies in the soil.

Fertilizers replenish nutrients in the soil that have been depleted by previous crops.

Types:

1. Natural fertilizers: Organic materials like manure and compost.
2. Synthetic fertilizers: Inorganic substances created for commercial use, such as ammonium nitrate or diammonium phosphate.

Explanation

• When a French bean germinates in soil, a hook-like structure emerges, which is called the hypocotyl.
• The hypocotyl is the stem of the seedling, and in French beans.
• It forms a hook-like structure that pushes the cotyledon (seed leaf) upwards.

Explanation

• The statement "A chemical compound always contains the same elements combined together in the same proportion or ratio" is a statement of the Law of Constant Composition.
• It is also known as the Law of Definite Proportions.
• This law was first discovered by Joseph Proust in 1797.

Explanation

Isotopes are atoms of the same element (same number of protons/nuclear charge) but different masses (different number of neutrons).

Explanation

• An element is a substance that consists of only one type of atom and cannot be further split up into simpler substances by chemical reactions.
• Examples: hydrogen (H), carbon (C), oxygen (O), and iron (Fe).

Explanation

Unsaturated Solution: A solution that can dissolve more solute at a given temperature.

Saturated Solution: A solution that contains the maximum amount of solute that can dissolve at a specific temperature.

Explanation

• Omnivores are animals that eat both plants and animals.
• They have adaptations that allow them to digest and extract nutrients from a wide variety of food sources, including fruits, leaves, insects, small animals, and even carrion.
• Examples of omnivores include humans, bears, pigs, chimpanzees, and raccoons.

Explanation

• Fats are not found in vegetables.
• Most vegetables are primarily composed of carbohydrates, water, and fiber, with very small amounts of fat.