Define hypothesis.
A testable prediction about the relationship between variables.
True or false: Photosynthesis occurs in mitochondria.
FALSE
Photosynthesis occurs in chloroplasts, primarily in plants.
Fill in the blank: Atoms are made up of protons, neutrons, and _______.
Electrons
What is cellular respiration?
The process by which cells convert glucose and oxygen into energy, carbon dioxide, and water.
Define ecosystem.
A community of living organisms interacting with their environment.
True or false: Acids have a pH greater than 7.
FALSE
Acids have a pH less than 7, while bases have a pH greater than 7.
What is the atomic number?
The number of protons in the nucleus of an atom, defining the element.
Fill in the blank: Newton’s second law states that force equals mass times _______.
Acceleration
Define biodiversity.
The variety of life in a particular habitat or ecosystem.
What is the law of conservation of mass?
Matter cannot be created or destroyed in a chemical reaction.
True or false: Gravity is a force that pulls objects toward each other.
TRUE
What is a chemical reaction?
A process where substances (reactants) are transformed into new substances (products).
Fill in the blank: The nucleus contains _______ and neutrons.
Protons
Define ecosystem services.
Benefits provided by ecosystems to humans, like clean water and pollination.
What is homeostasis?
The ability of an organism to maintain stable internal conditions despite external changes.
True or false: Ionic bonds involve the sharing of electrons.
FALSE
Ionic bonds involve the transfer of electrons between atoms.
What is natural selection?
The process by which organisms better adapted to their environment tend to survive and reproduce.
Fill in the blank: The periodic table organizes elements by increasing atomic _______.
Number
Define photosynthesis.
The process by which green plants use sunlight to synthesize foods from carbon dioxide and water.
What is kinetic energy?
The energy an object possesses due to its motion.
True or false: Osmosis is the movement of water across a membrane.
TRUE
What is matter?
Anything that has mass and occupies space.
Fill in the blank: The scientific method involves making observations, forming a hypothesis, and conducting _______.
Experiments
Define enzyme.
A protein that acts as a catalyst to speed up chemical reactions in the body.
