The gas that plants absorb from the air to carry out photosynthesis is:
Inert nitrogen gas
C) D)
Pure oxygen gas
Carbon dioxide gas
The transfer of heat in liquids and gases through the movement of molecules is called:
Direct thermal conduction
Continuous thermal convection
Long-distance thermal radiation
Strong kinetic friction
A chemical reaction that releases heat to the surroundings is called:
An endothermic reaction
An exothermic reaction
A simple reversible reaction
A thermally neutral reaction
The process of cellular respiration consumes glucose and produces energy along with:
Oxygen gas and liquid water
Alcohol and mineral salts
Nitrogen gas and atmospheric dust
Carbon dioxide and water
Fats are used in the body of a living organism mainly for:
Building muscles and tissues
Energy storage
Transmitting genetic traits
Cooling the body
The breakdown of food molecules to produce energy inside the cell is called:
The process of cellular respiration
The process of plant transpiration
The simple process of fermentation
The process of photosynthesis
Which of the following elements is considered an important mineral salt for the body?
Hydrogen
Calcium
Carbon
Nitrogen
Heat is transferred in solid metal objects primarily through:
Thermal diffusion
Thermal radiation
Thermal convection
Thermal conduction
The conversion of complex food into simple, easily absorbed substances is called:
The process of respiration
The process of digestion
The process of circulation
The process of excretion
According to the particle theory, the particles of a single substance are:
Exactly identical in their properties
Completely different from each other
Visible to the naked eye
Completely stationary
A chemical equation must always be balanced to comply with the law of:
Action and reaction
Conservation of energy
Conservation of mass
Earth's gravity
The green pigment that absorbs light in plants is called:
Red hemoglobin
Colored carotenoids
Dark melanin
Green chlorophyll
Gases are distinguished from liquids and solids by their high ability to:
Maintain their own shape
Cohere with very strong forces
Vibrate in a fixed position
Be compressed into a small space
Most stages of cellular respiration for energy production occur inside organelles called:
The outer cell wall
The small ribosomes of the cell
The internal cytoplasm of the cell
The powerful mitochondria
The main product of photosynthesis that stores chemical energy is:
Dissolved mineral salts
Liquid water molecules
Simple glucose sugar
The sun's energy reaches us through outer space primarily via:
Physical thermal conduction
Wave-like thermal radiation
Direct thermal contact
) Gaseous thermal convection
If an object's temperature is 20°C, what is its value in Kelvin (K)?
313
273
253
293
The particles of a solid move continuously but in the form of:
Rapid rotational motion
Localized vibrational motion
Rapid random motion
Extensive translational motion
A gas is released as a byproduct of the photosynthesis process, which is:
Methane
Oxygen
When a substance gains thermal energy, the speed of its particles:
Increases and their motion accelerates
) Stops completely
Remains constant and does not change
Decreases and their motion slows down
The cellular organelles responsible for the process of light absorption in plants are:
Chloroplasts in the cell
The central nucleus of the cell
Mitochondria in the cell
Large vacuoles
The plasma state is a distinct state of matter found prominently in:
The rocky interior of the Earth
Stars and lightning phenomena
Oceans and deep seas
Mountains and icy peaks
The main and fast source for obtaining energy in the human body is:
Simple, easy carbohydrates
Essential mineral salts
Strong animal proteins
Heavy saturated fats
When heat transfers between two bodies, the transfer stops when:
Their temperatures become equal
The volume of the cold body increases
Their temperatures are different
The mass of the hot body decreases
Aerobic cellular respiration primarily requires the presence of:
Carbon dioxide
A chemical equation consists of two sides always separated by:
An arrow
A comma
An equals sign
A period
A substance that increases the rate of a reaction without being consumed is called:
The solid precipitate formed
A catalytic agent (catalyst)
The continuous liquid solvent
A sensitive colorimetric reagent
In the photosynthesis equation: 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂, if the plant consumes 12 water molecules, how many oxygen molecules are produced?
24 molecules
6 molecules
18 molecules
12 molecules
Dietary fibers found in vegetables and fruits help in:
Colouring red blood cells
Improving the daily digestion process
Building chemical hormones
Rapidly increasing body weight
The relationship between photosynthesis and cellular respiration ensures:
A complete depletion of oxygen
A constant increase in carbon
The stoppage of material cycles
A balance in gas ratios
A deficiency of vitamin C in a person's daily diet leads to:
Soft bones and easy fractures
Hair loss and dry skin
Poor vision and night blindness
Bleeding gums and weakened immunity
Heat is transferred in liquids through currents called:
Conduction currents
Diffusion currents
Radiation currents
Convection currents
During photosynthesis, light energy is converted into:
Audible sound energy
Mechanical kinetic energy
Stored chemical energy
Visible magnetic energy
Which of the following states of matter is characterized by having a fixed shape and a definite volume?
Gaseous state
Plasma state
Solid state
Liquid state
Breaking bonds in the reactants and forming new bonds in the products is called:
Physical shape change
The process of physical fusion
The simple process of dissolution
A real chemical reaction
The primary function of mitochondria in the cell is:
Controlling cell division
Carrying out photosynthesis
Storing water and salts
Producing energy for the cell
Proteins are made up of very small basic building blocks called:
Water-soluble vitamins
Different amino acids
Simple monosaccharides
Large fatty acids
The intermolecular spaces between the particles of matter are greatest in:
The flowing liquid state
The diffused gaseous state
The cohesive solid state
The frozen cold state
Transforming matter from the gaseous state to the liquid state is called:
The process of freezing by cooling
The process of rapid evaporation
The process of condensation by cooling
The process of fusion by heat
Melting occurs when the particles of a substance gain enough energy to:
Reduce the intermolecular spaces
Increase the bonding forces between them
Overcome the attractive forces
Stop the movement of particles
The substances we start a reaction with, found on the left side of the equation, are:
The initial reactants
The resulting soluble salts
The final products
The assisting catalytic agents
he total energy stored within the particles that make up matter is called:
The internal energy of matter
The total mechanical energy
Static electrical energy
Potential chemical energy
The reaction of an acid with a base to produce a salt and water is called:
Chemical combustion
Chemical decomposition
Chemical exchange
Chemical neutralization
What is the name of the compounds formed from the union of monosaccharides?
Nucleic acids
Oily lipids
Diverse proteins
Complex carbohydrates
Transforming matter from the liquid state to the gaseous state is called:
Freezing
Evaporation
Condensation
Boiling
4g of (A) reacted with 6g of (B), producing 9g of (C). What is the mass of product (D)?
3g
1g
4g
2g
Which of the following materials is considered a complex carbohydrate?
White rice powder
Rock salt
Pure olive oil
Fine table sugar
The main location where photosynthesis occurs in plants is:
Flowers
Roots
Leaves
Stems
Dust particles move randomly in the air in a motion known as:
Optical radiation phenomenon
Random Brownian motion
Kinetic conduction phenomenon
Thermal diffusion phenomenon
The element iron is very essential in the human body for the formation of:
Protection of the thin cell membrane
The plant cell wall
Strong bones and teeth
Hemoglobin in the blood