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What is the powerhouse of the cell?
Mitochondria.
What are the three main layers of the Earth?
Crust, mantle, and core.
What is an organism that can make its own food?
A producer or autotroph.
What is the function of the nucleus in a cell?
It controls cell activities and contains DNA.
What is volume?
The amount of space an object occupies.
What are organisms called that cannot make their own food?
Consumers or heterotrophs.
What is the atmosphere?
The layer of gases that surrounds Earth.
What is the name of our galaxy?
The Milky Way
What is mass?
The amount of matter in an object
What is the function of the roots in plants?
To absorb water and nutrients.
What is the purpose of red blood cells?
To carry oxygen throughout the body
What is recycling?
Reusing materials to make new products.
What is an asteroid?
A small rocky object that orbits the Sun
What is a molecule?
Two or more atoms bonded together
What is the Sun?
A star at the center of our solar system
What is the atomic number of an element?
The number of protons in its nucleus
What is pollution?
Harmful substances in the environment.
What are chromosomes?
Structures that carry genetic information
What is the function of DNA?
To store and transmit genetic information.
What is a mutation?
A change in the DNA sequence.
What are the three main types of blood cells?
Red blood cells, white blood cells, and platelets.
What is migration?
The seasonal movement of animals from one place to another
What is evaporation?
When water changes from a liquid to a gas.
What is the difference between a vertebrate and an invertebrate?
Vertebrates have a backbone; invertebrates do not.
What does the respiratory system do?
It takes in oxygen and removes carbon dioxide.
What is the periodic table used for?
To organize and display all known elements
What is hibernation?
A state of inactivity that some animals go into during winter.
What is a comet?
A body of ice, rock, and dust that orbits the Sun.
What is a volcano?
Why is it important to save water?
Because it’s a limited resource essential for life.
What is an ecosystem?
A community of living things interacting with each other and their environment
What is biodiversity?
The variety of life in a specific habitat or ecosystem.
What is a renewable resource?
A resource that can be replenished naturally, like solar or wind energy.
What are non-renewable resources?
Resources that cannot be easily replenished, like oil and coal
What is gravity?
A force that pulls objects toward each other
What is photosynthesis?
The process by which plants make food using sunlight, carbon dioxide, and water
What is conservation?
Protecting and preserving natural resources
The process of rocks and soil being worn away by wind or water
What is climate?
The typical weather pattern of a region over a long period
What is the greenhouse effect?
When gases in Earth’s atmosphere trap heat.
What causes a solar eclipse?
When the Moon passes between the Earth and the Sun, blocking the Sun
What is a life cycle?
The series of stages an organism goes through from birth to adulthood
What is the water cycle?
The process of water moving from the ground to the sky and back again.
What is a food chain?
A sequence that shows how energy is transferred from one organism to another
What causes the phases of the Moon?
The changing positions of the Moon, Earth, and Sun
What is the difference between weather and climate?
Weather is short-term atmospheric conditions; climate is the average over a long time
What is an adaptation?
A characteristic that helps an organism survive in its environment.
What do decomposers do in an ecosystem?
Break down dead plants and animals into nutrients for the soil.
What is the main difference between plant and animal cells?
Plant cells have a cell wall and chloroplasts; animal cells do not.
What is global warming?
The gradual increase in Earth’s temperature due to pollution