Life Science
What is the role of a producer in an ecosystem?
An organism that makes its own food using sunlight (photosynthesis).
What causes day and night on Earth?
Earth’s rotation on its axis.
What is matter?
Anything that has mass and takes up space.
If a plant dies, how does that affect the food web?
It reduces energy available to herbivores and higher levels.
What is the relationship between a predator and prey?
A predator hunts and eats the prey.
What is the main source of energy for Earth’s weather systems?
The Sun.
What is the difference between a physical change and a chemical change?
Physical = no new substance; Chemical = new substance formed.
Why would a species decrease if its predator is removed?
It may overpopulate and run out of resources.
What is a food web?
A model that shows how energy moves through multiple food chains.
What is the difference between weather and climate?
Weather is short-term conditions; climate is long-term patterns.
What is density? What is Thermal energy?
Density relates to if something will float or sink in water, and thermal energy is the amount of heat a object contains.
What is Commensalism?
One organism benefits, and the other is not harmed nor impacted.
What happens to energy as it moves up a food chain?
Energy decreases at each level.
What is one effect of human activity on Earth’s systems?
Increased CO₂ leading to climate change.
What happens to particles when temperature increases?
They move faster.
Why do coastal areas have milder climates than inland areas?
Water heats and cools slower than land.
Why would two organisms compete in the same ecosystem?
They need the same limited resources (food, water, space).
What process moves water from Earth’s surface into the atmosphere?
Evaporation.
What type of energy is stored energy?
Potential energy.
If two species rely on the same bacteria for food, what relationship will likely occur?
Competition.