RESPIRATORY SYSTEM
Which main muscle below the lungs contracts and moves downward to pull air into the body?
The diaphragm
What state of matter has a fixed volume but takes the shape of its container?
Liquid
What is the flow of electric charge through a conductor called?
Electric current
What is the formula used to calculate pressure?
Pressure = Force รท Area
What is the largest planet in our solar system?
Jupiter
What tiny air sacs in the lungs are responsible for gas exchange with the bloodstream?
Alveoli
What is the process of a gas turning directly into a solid without becoming a liquid first called?
Deposition
What type of circuit has only one path for electricity to flow through?
A series circuit
What SI unit is used to measure pressure?
Pascal (Pa)
Which country is home to the Great Barrier Reef?
Australia
Which gas is taken into the blood during inhalation, and which gas is released during exhalation?
Oxygen is taken in , carbon dioxide is released
How do particles move in a solid compared to a gas?
Particles in a solid vibrate in fixed positions, while gas particles move rapidly and freely in all directions.
What material property opposes the flow of electric current?
Resistance
Why do high heels sink into grass more easily than flat sneakers?
High heels have a smaller surface area, which concentrates force and creates higher pressure.
What chemical element has the symbol "Fe" on the periodic table?
Iron
What is the common name for the trachea?
The windpipe
What happens to the kinetic energy of particles in a substance as it is heated?
The kinetic energy increases, causing the particles to move faster.
What is the difference between a conductor and an insulator? Give one example of each
A conductor allows electricity to flow easily (e.g., copper), while an insulator blocks or slows the flow of electricity (e.g., rubber).
What happens to atmospheric pressure as you climb higher up a mountain?
It decreases because there are fewer air molecules above you.
What is the primary gas found in Earth's atmosphere?
Nitrogen
How do ciliated cells and mucus protect the respiratory system from dust and pathogens?
Mucus traps dust and germs, while cilia sweep the mucus up and out of the airways.
What is the fourth state of matter, formed when gas particles become ionized at extremely high temperatures?
Plasma
If one light bulb burns out in a parallel circuit, what happens to the other light bulbs?
They stay lit because each branch has its own independent loop.
What happens to the pressure of a gas if its volume is decreased at a constant temperature?
Pressure increases
What is the hardest naturally occurring substance on Earth?
Diamond