Scientific Method
The first step where a scientist notices something and asks a question.
observation
Which property refers to water molecules sticking to each other because of hydrogen bonding.
cohesion
What macromolecule provides quick energy and includes sugars and starches?
Carbohydrates
What is the “control center” of the cell that contains DNA?
Nucleus
What is the movement of water across a semipermeable membrane called?
Osmosis
A testable prediction or educated guess about what will happen in an experiment.
hypothesis
What property of water allows it to stick to other surfaces like plant cell walls?
Adhesion
What macromolecules are made of amino acids and help build muscles and enzymes?
Proteins
What organelle produces energy (ATP) through cellular respiration?
Mitochondria
What is the movement of molecules from high concentration to low concentration without energy called?
Diffusion
The variable that the scientist intentionally changes in an experiment.
independent variable
What type of molecule is water because it has both positive and negative ends?
Polar molecule
What macromolecules include fats and oils and are used for long-term energy storage?
Lipids
What organelle is responsible for making proteins?
Ribosomes
What type of transport requires energy to move molecules against the concentration gradient?
Active transport
Janna wants to test how different amounts of sunlight affect plant growth. Plant growth that Janna will measure is what kind of variable in this experiment?
dependent variable
What property of water allows it to absorb a lot of heat before its temperature changes?
High specific heat
What macromolecule stores and transmits genetic information?
Nucleic acids
What structure controls what enters and leaves the cell?
Cell membrane
What organelle in plant cells is the site of photosynthesis?
Chloroplast
A scientist tests a new fertilizer on one group of plants. Another group of plants does not receive the fertilizer. Which group is the control group?
plants without fertilizer
What properties of water helps plants pull water upward through their stems?
cohesion and adhesion
What are the small building blocks that make up proteins?
Amino acids
What organelle contains enzymes and cleans up waste materials in the cell like how a janitor cleans up a room?
lysosomes
What is the process called in which plants use sunlight, water, and carbon dioxide to make glucose and oxygen?
Photosynthesis