Biology Basics
What is the function of the mitochondria?
Answer: Powerhouse of the cell, produces energy/ATP
What is the atomic number of carbon?
6
What is the unit of force?
Answer: Newton
What is a variable?
Answer: A factor that can change in an experiment
What type of graph is best for continuous data?
Answer: Line graph
Name one organ involved in the digestive system.
Answer: Stomach / intestines / liver / etc.
What is the formula for sodium chloride?
Answer: NaCl
Name a type of energy.
Answer: Kinetic, potential, thermal, etc.
What is a control variable?
Answer: Something kept constant in an experiment
What does the gradient of a distance-time graph represent?
Answer: Speed
What is osmosis?
Answer: The movement of water molecules from a high to low water potential through a semi-permeable membrane
Define a covalent bond.
Answer: A bond formed by the sharing of electrons between atoms
State the formula for speed.
Answer: Speed = distance ÷ time
Why is it important to repeat experiments?
Answer: To improve reliability and identify anomalies
How do you identify an anomaly in a results table?
Answer: A value that does not fit the trend
Which part of the plant carries water?
Answer: Xylem
State the test for hydrogen gas.
Answer: Lit splint makes a 'pop' sound
What happens to the current in a series circuit when another resistor is added?
Answer: The total current decreases
What does a hypothesis need to include?
Answer: A testable statement with independent and dependent variables
What does the area under a speed-time graph represent?
Answer: Distance travelled
Describe how enzymes work.
Answer: They are biological catalysts that speed up reactions without being used up, specific to substrates
Balance this equation: H₂ + O₂ → H₂O
Answer: 2H₂ + O₂ → 2H₂O
Define work done.
Answer: Work = force × distance moved in direction of force
Explain the difference between accuracy and precision.
Answer: Accuracy is closeness to the true value; precision is consistency of results
Describe how to label the axes of a graph.
Answer: Independent variable on x-axis, dependent variable on y-axis, include units