Biology and Chemistry Quiz

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Questions and Answers

What is the net charge of an atom that has 8 protons and 6 electrons?

+2 (correct)

-2

Which statement about the electron configuration of an atom is correct?

The 2nd shell can hold 18 electrons.

The 1st shell can hold 2 electrons. (correct)

The 3rd shell can hold 32 electrons.

The 1st shell can hold 8 electrons.

How is the atomic mass of an atom calculated?

Atomic Mass = No.of protons + No.of neutrons (correct)

Atomic Mass = No.of electrons + No.of protons

Atomic Mass = No.of neutrons - No.of protons

Atomic Mass = No.of protons + Atomic number

What defines the element to which an atom belongs?

The number of protons in the nucleus Signup and view all the answers

If an atom has an atomic number of 15 and a mass number of 31, how many neutrons does it have?

16 Signup and view all the answers

Which particle has a relative mass smaller than 1?

Electron Signup and view all the answers

What is the electron count in a neutral atom if the atomic number is 12?

12 Signup and view all the answers

Which of the following statements is true regarding ions?

Ions can have a net positive or negative charge based on the number of protons and electrons. Signup and view all the answers

What are infectious diseases primarily caused by?

Microorganisms and prions Signup and view all the answers

Which of the following is NOT a type of microorganism responsible for infectious diseases?

Hormones Signup and view all the answers

What component of the Earth's spheres can be impacted by natural events?

All of the above Signup and view all the answers

Newton's Second Law is represented by which equation?

F = ma Signup and view all the answers

What describes a force that does not change the motion of an object?

Balanced force Signup and view all the answers

What type of relationship does photosynthesis represent in an ecosystem?

Producer-consumer relationship Signup and view all the answers

Which of the following accurately describes isotopes?

Atoms with the same number of protons but different neutrons Signup and view all the answers

Which process involves the transformation of light energy into chemical energy?

Photosynthesis Signup and view all the answers

What hormone released by the thymus gland helps in the production of white blood cells?

Thymosin Signup and view all the answers

Which gland is responsible for regulating calcium levels in the blood?

Parathyroid Gland Signup and view all the answers

Which hormone is primarily responsible for controlling sleep-wake patterns?

Melatonin Signup and view all the answers

What is one of the primary functions of the excretory system?

To filter blood Signup and view all the answers

What type of waste is urea, and how is it formed?

A nitrogenous waste formed from protein metabolism Signup and view all the answers

Which part of the body plays a role in excreting excess water and salts?

Skin Signup and view all the answers

What defines matter in the context of chemistry?

Anything that takes up space and can be weighed Signup and view all the answers

How does the endocrine system primarily communicate changes within the body?

Through hormone release into the bloodstream Signup and view all the answers

What process describes how nitrogen enters the soil through natural events?

Nitrogen fixation Signup and view all the answers

What is the term for the process that converts nitrogen into a consumable form for plants and animals?

Nitrification Signup and view all the answers

What describes the role of microorganisms in regulating nitrogen in the soil?

Immobiliation Signup and view all the answers

During which process is nitrogen released back into the atmosphere?

Denitrification Signup and view all the answers

What does Newton's 2nd Law of Motion state about the relationship between force, mass, and acceleration?

The acceleration depends on both the applied force and the object's mass. Signup and view all the answers

What does the term 'inversely proportional' imply?

As one factor increases, the other decreases. Signup and view all the answers

Newton's 1st Law of Motion indicates what about an object in motion?

An object remains in motion unless acted upon by an unbalanced external force. Signup and view all the answers

What does the net force refer to?

The combined effect of all forces acting on an object. Signup and view all the answers

What is the primary process that transforms the asthenosphere into a semi-liquid state?

Convection Signup and view all the answers

What causes the convection currents in the asthenosphere?

Differences in density due to temperature variations Signup and view all the answers

Which technological tool is primarily used to measure and detect earth tremors?

Seismometer Signup and view all the answers

How do GPS trackers contribute to the understanding of earthquakes?

By tracking tectonic plate movements in earthquake-prone regions Signup and view all the answers

What effect does continental drift have on landforms?

It leads to the formation of new landforms through processes like folding and faulting. Signup and view all the answers

What happens to the liquid in the asthenosphere as it gets closer to the Earth’s core?

It becomes hotter and less dense, and then rises. Signup and view all the answers

What are the primary functions of seismic waves in earthquake research?

To determine the epicentre and magnitude of earthquakes Signup and view all the answers

What role does density play in the movement of the asthenosphere?

Less dense liquid rises while denser liquid sinks. Signup and view all the answers

Study Notes

Living World

Infectious diseases are caused by microorganisms (bacteria, viruses, fungi, parasites) transmitted to humans from various sources, including other humans and the environment.
The endocrine system regulates body functions through hormones released into the bloodstream, influencing growth, sleep, and metabolism.
Key glands include the thymus (producing thymosin for white blood cell production), parathyroid (controlling blood calcium levels), and pineal (regulating sleep patterns via melatonin).
The excretory system removes waste products, essential for maintaining cell function and includes the respiratory, urinary, and integumentary systems.
Nitrogenous waste from protein metabolism is processed in the liver to form urea, which is filtered by the kidneys into urine.

Chemical World

Chemistry studies matter, its structure, properties, and behavior during chemical reactions.
Atomic structure consists of subatomic particles: protons, neutrons, and electrons, with atomic mass concentrated in the nucleus.
Protons give an element its identity; atomic number equals the number of protons.
Electron configuration follows a specific distribution across shells: K (2), L (8), M (18), N (32).
Net charge calculations reveal the balance of protons and electrons, influencing atom stability and identifying ions.

Physical World

Newton’s Laws of Motion explain the relationship between force and motion:
- First Law: Objects remain at rest or in uniform motion unless acted upon by an external force.
- Second Law: Acceleration depends on force and mass (F=ma).
- Third Law: For every action, there’s an equal and opposite reaction.
Forces can be balanced or unbalanced, affecting object acceleration and motion.
Speed is defined as the distance traveled over time, while acceleration measures the change in velocity over time.

Earth and Space

Natural cycles (e.g., water, carbon) interact with global catastrophes (earthquakes, volcanic eruptions) impacting Earth's spheres.
Plate tectonics are driven by convection currents in the semi-molten asthenosphere, resulting in landform creation and geological processes like folding and faulting.
The Big Bang theory is supported by evidence from cosmic background radiation and the expansion of the universe, with technological advancements like telescopes aiding observations.

Working Scientifically

Scientific diagrams facilitate understanding of complex systems and processes.
Analyzing graphs and interpreting data from tables are crucial skills for scientific inquiry and understanding trends in data.
The utilization of seismometers and GPS technology enhances earthquake detection, tracking tectonic movements for preparedness and hazard assessment.

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Description

Test your knowledge on key concepts from biology and chemistry, including infectious diseases, the endocrine system, and atomic structure. This quiz covers essential processes in living organisms and fundamental chemical principles. Dive in to see how well you understand these vital scientific topics!