metric system
the base units on a metric system is
Meters,liters,grams
What is the variable that you change on purpose in an experiment?
Independent variable
What is the energy rule in a trophic pyramid?
Only about 10% of energy moves to the next level.
What part of the microscope do you look through?
Ocular lens
What do both plant and animal cells have?
Cell membrane, nucleus, cytoplasm, and mitochondria
How many millimeters (mm) are in 1 meter (m)?
1,000 mm
What is the variable you measure or observe in an experiment?
Dependent variable
Which level of the food chain has the most energy?
Producers (plants)
What part holds the slide in place?
stage
What structure do plant cells have that animal cells do not?
Cell wall
Convert 4.5 meters into centimeters.
450 cm
What are the things you keep the same during an experiment called?
Constants (controlled variables)
Why do higher trophic levels have fewer organisms?
Because less energy is available as you move up.
What part of the microscope controls how much light reaches the specimen?
Light source / diaphragm
What organelle helps plants make food using sunlight?
Chloroplast
What metric unit is used to measure mass?
Gram (g)
A scientist tests if fertilizer affects plant growth. The amount of fertilizer is changed. What is the independent variable?
Amount of fertilizer
If plants have 10,000 units of energy, how much energy do primary consumers get?
1,000 units
If the ocular lens is 10x and the objective lens is 40x, what is the total magnification?
400x
(10 × 40 = 400)
What is the main difference between plant and animal cells
Plant cells have a cell wall, chloroplasts, and a large central vacuole; animal cells do not.
Convert 0.75 liters into milliliters.
750 mL
A scientist tests different amounts of sunlight and measures plant height. What is the dependent variable?
Plant height
A food chain has:
🌱 Grass - 🐇 Rabbit - 🦊 Fox
If grass has 50,000 energy units, how much does the fox get?
A: 500 units
500 units
(Grass 50,000 - Rabbit 5,000 - Fox 500)
When you increase magnification, what happens to your field of view?
It gets smaller (you see less of the specimen
Why do plant cells have chloroplasts but animal cells do not
Plant cells use chloroplasts to do photosynthesis and make their own food.