Interactions Within Ecosystems
How can the removal of a single producer affect an entire food web?
It decreases the energy available at all trophic levels, causing population declines throughout the food web.
Why is seawater considered a solution and not a mixture of visible particles?
Because salts dissolve completely, forming a homogeneous mixture at the particle level.
Why do different materials heat up at different rates?
They have different specific heat capacities — some require more energy to raise their temperature.
Why do oceanic plates subduct under continental plates?
Oceanic crust is denser, so it sinks beneath the less dense continental crust.
Which is the only Brazilian soccer team to win the Copa Libertadores four times?
Clube de Regatas do Flamengo
Why are decomposers considered essential for ecosystem stability?
They recycle nutrients back into the soil, allowing plants to grow and supporting all other levels.
Explain why increasing temperature usually increases solubility
Heat increases particle movement making solids dissolve faster
What are the three types of heat transfer?
Convection
Conduction
Radiation
How does the movement of tectonic plates create mountain ranges over millions of years?
When plates collide, the crust folds, bends, and is pushed upward (uplift), forming mountain ranges through long-term compression.
Why do planets with thicker atmospheres tend to be warmer?
Thick atmospheres trap more heat through the greenhouse effect.
Explain how competition between two species can lead to the exclusion of one of them.
If two species compete for the same limited resource, the better-adapted one survives, causing competitive exclusion.
Why does stirring accelerate the dissolving process in terms of particle movement?
Stirring increases collisions between solvent and solute particles, breaking solute apart faster.
How can you prove that global warming exist? List at least 3 SCIENTIFIC WAYS
there are a lot of correct answers
Why are earthquakes more common at transform and convergent boundaries than at divergent ones?
Movement at transform and convergent boundaries generates intense friction and energy buildup, causing frequent quakes.
How many bones are there in our body?
206
How do invasive species disrupt energy flow and nutrient cycling in an ecosystem?
Invasive species compete with native organisms for resources, reduce local populations, alter food webs, and change nutrient availability by disrupting natural feeding and recycling processes.
What is the name of the liquid inside our stomach and why it's so important?
Hydrochloric acid.
It is important because it helps break down food, kills harmful bacteria, and contains enzymes that start the digestion of proteins.
How does thermal expansion explain the formation of cracks in roads during hot seasons?
Materials expand when heated; if roads expand beyond their structural limits, stress builds up and causes cracks
what are the events that occur when (1) continental crust collides with continental crust, (2) continental crust converges with oceanic crust, and (3) oceanic crust converges with oceanic crust.
The formation of mountain ranges (continental–continental)
Subduction creating volcanoes and deep ocean trenches (continental–oceanic)
Subduction forming volcanic island arcs (oceanic–oceanic)?
Are viruses considered dead or living things?
Viruses are Visures. They cannot carry out essential life processes on their own, such as reproduction or metabolism. They must invade a host cell to reproduce, which is why many scientists write about them as "Viruses are Viruses"
Describe how changes in abiotic factors (temperature, pH, sunlight) can indirectly affect predator–prey relationships.
Abiotic changes can reduce prey populations or affect reproduction rates, altering predator numbers and destabilizing the relationship.
What is Matter? Pure Substance? Mixture? Mechanical Mixture Solution? SAY THE SCIENTIFIC ANSWER.
Matter is anything that has mass and occupy space.
A pure substance is made of only one type of particle.
A mixture contains two or more substances that are physically combined (not chemically).
A mechanical mixture is a mixture where you can see the different parts.
A solution is a mixture that looks uniform
What are the 4 main ideas of the Particle Theory of Matter?
All matter is made up of tiny particles
The particles are always moving and vibrating
Adding heat to matter makes the particles move and vibrate faster
The particles have space between them
Why are fossil fuels considered nonrenewable even though they originate from living organisms?
They take millions of years to form — far slower than the rate at which humans use them.
Why does the loss of genetic variation make a population more vulnerable to diseases?
Low variation means many individuals share similar vulnerabilities; a single pathogen can affect most of the population without resistant individuals who ensure survival.