Structure & Properties of Matter
What is matter made of?
Atoms
What is the evidence of a chemical change?
Color change, gas, temperature change, new substance
What is the basic unit of life?
Cell
What do we call living and nonliving things interacting?
Ecosystem
What causes day and night?
Earth’s rotation
What does the periodic table organize?
Elements
What is the law of conservation of mass?
Matter is not created or destroyed in a reaction
Which organelle is the "powerhouse" of the cell?
Mitochondria
What is a consumer?
An organism that eats other organisms
What causes seasons?
Earth’s tilt and orbit around the Sun
Which three subatomic particles are in an atom?
Protons, neutrons, electrons
What do we call substances that start a chemical reaction?
Reactants
What structure controls what enters and leaves the cell?
Cell membrane
What is a decomposer’s role?
Breaks down dead matter and recycles nutrients
What is the water cycle?
Movement of water through evaporation, condensation, and precipitation
What is a physical change? Give one example.
Change that doesn’t alter chemical makeup; e.g., melting ice
What do we call substances that are produced in a chemical reaction?
Products
How are plant and animal cells different?
Plant cells have a cell wall and chloroplasts; animal cells do not
What happens when one species is removed from a food web?
It can disrupt the balance of the ecosystem
What layers make up the Earth?
Crust, mantle, outer core, inner core
What happens to particle motion as temperature increases?
Particles move faster
What kind of reaction happens when two substances combine into one?
Synthesis reaction
What is the purpose of cell division?
Growth, repair, and reproduction
What is biodiversity and why is it important?
Variety of life; more biodiversity = healthier ecosystem
What is plate tectonics?
Theory explaining the movement of Earth’s plates