Cell structure and function
What part of the cell is known as the “control center” because it holds the DNA?
The nucleus.
Which state of matter has a fixed shape and fixed volume?
Solid
What do we call how fast an object moves?
Speed
What process do plants use to make their own food?
Photosynthesis.
What is the first step of the scientific method?
Asking a question. (Also Observation or identifying a problem)
Which structure is found in plant cells but not in animal cells and helps make food?
Chloroplast.
What happens to particle motion when temperature increases?
Particles move faster.
What is the difference between speed and velocity?
Velocity includes direction; speed does not.
What gas do plants take in and what gas the plant realeases during photosynthesis?
Takes in Carbon dioxide. Realeases Oxygen.
Which variable is the one you change in an experiment?
Independent variable.
How do we call the inner subunits of a biological cell? The ones that are like the cell versions of the human organs
Organelles
What phase change occurs when a liquid turns into a gas?
Evaporation (or vaporization).
If an object doesn’t change its position, what is its speed, and how do we call it?
Zero, at rest.
Where in the cell does photosynthesis take place?
Chloroplasts.
Which type of graph is best for showing change over time?
Line graph.
What organelle produces energy for the cell and is often called the “powerhouse”?
Mitochondria.
What state of matter is a lightning in?
Plasma
Name one factor that can change an object’s motion and explain how.
A force (like friction or a push)
It can speed up, slow down, or change direction.
How do we call the process that a plant use to release energy from food.
Cellular respiration
What statistical measure tells you the most common value in a data set?
Mode.
Put these levels in order from simplest to most complex: tissue, cell, organ, organ system.
Cell → tissue → organ → organ system.
What phase change occurs when a gasturns into a solid?
Deposition
What's the difference between velocity and acceleration?
Velocity is how fast an object moves in a specific direction (change in position over time, e.g., m/s), while acceleration is the rate at which that velocity changes (change in velocity over time, e.g., m/s²)
Explain the difference between Photosynthesis and Cellular Respiration
Photosynthesis stores energy in glucose, and respiration releases that energy for cells to use.
Why is it important to repeat experiments and analyze errors?
To improve reliability and make conclusions more accurate.