CSI & LAB SKILLS
Which system of measurement is used by scientists throughout most of the world?
Metric system
Which reagent tests for starch?
Iodine
What type of transport moves water across a membrane?
Osmosis
What molecule provides usable energy for cells?
ATP
Which organelle carries out photosynthesis?
Chloroplast
During the CSI lab, why did we compare evidence from the crime scene to evidence from each suspect?
To determine which suspect's evidence most closely matched the crime scene.
Which reagent requires heating before the results can be interpreted?
Benedict's Solution
A red blood cell is placed into pure water.
What happens?
It swells.
Which organism did we use to study fermentation?
Yeast
Which tool did we use during Lab 7 to identify unknown organisms?
Dichotomous key
In an experiment, which variable is intentionally changed by the scientist?
Independent variable
You are using a microscope with a 10× ocular lens and a 40× objective lens.
What is the total magnification?
400×
Which transport process requires ATP?
Active transport
Why do muscles temporarily switch to anaerobic metabolism during intense exercise?
Oxygen becomes limited.
What are the 2 languages used for scientific names?
Greek and Latin
Your experiment has an independent variable, but no control group. Why is this a problem?
There is no baseline for comparison, making it difficult to determine whether the independent variable caused the results.
Why did the boiled potato produce fewer bubbles than the raw potato during the catalase experiment?
Boiling denatured catalase, reducing its ability to break down hydrogen peroxide.
During Lab 4, why did we use agar cubes of different sizes?
To investigate how surface area-to-volume ratio affects the rate of diffusion
Plants perform BOTH photosynthesis and cellular respiration.
Why do they still need cellular respiration?
To produce ATP for cellular work
During the catalase experiment, one test tube produced no bubbles.
Give ONE possible explanation based on what you learned in lab.
A student measures plant growth but accidentally gives one plant more water and more sunlight than the others. What mistake did they make?
They failed to control variables, so they cannot determine which factor affected plant growth.
Your microscope is currently using the 40× objective lens, and you're finished using it.
List TWO things you should do before putting the microscope away.
A cell is placed into a hypertonic solution.
Predict:
• Which direction water moves
• What happens to the cell.
Water moves out of the cell.
The cell shrinks.
A plant receives water and sunlight but no carbon dioxide.
Will photosynthesis continue normally?
Explain why or why not.
No. Carbon dioxide is a required reactant for photosynthesis, so glucose production will eventually stop.
Complete the pathway below:
Food → __________ → ATP → __________
(Hint: Think about what we did in multiple labs.)
Food → Cellular Respiration → ATP → Active Transport (or other ATP-powered cellular work)