WorksheetsACT - Science Prep #1
Total questions: 5
Worksheet time: 3mins
An aquatic plant was placed under various light intensities. At 100 lux, the plant released 5 oxygen bubbles per minute. At 500 lux, it released 20 bubbles per minute. What is the approximate increase in the photosynthesis rate between 100 lux and 500 lux?
5 bubbles/min
12 bubbles/min
15 bubbles/min
20 bubbles/min
A student tested how different fertilizer concentrations affect the growth of tomato plants over two weeks. The plants grew 2 cm with no fertilizer, 10 cm with 3% fertilizer, but only 9 cm with 4% fertilizer. What conclusion can best be drawn from this experiment?
Higher fertilizer always leads to more plant growth
Fertilizer has no effect on plant growth
Plant growth increases up to a certain concentration, then decreases
Maximum growth occurs without any fertilizer
Scientists measured enzyme activity at various temperatures. The enzyme showed its highest reaction rate at 40°C, but the rate decreased at 50°C. At which temperature was the enzyme most active?
20°C
30°C
40°C
50°C
An enzyme’s reaction rate increased steadily as the temperature rose from 10°C to 40°C. At 50°C, the reaction rate dropped. What does this suggest about the enzyme’s activity beyond 40°C?
The enzyme becomes more efficient at higher temperatures
The enzyme’s activity decreases due to possible denaturation
The enzyme continues to speed up the reaction
Temperature has no effect on the enzyme
Two students are debating the Moon’s geologic history. Student 1 believes the Moon has no internal heat and is geologically inactive. Student 2 believes the Moon still has internal heat and experienced volcanic activity in recent geologic time. Which statement would both students most likely agree on?
The Moon is currently volcanically active
The Moon has always been geologically inactive
Most of the Moon’s surface features are due to ancient impacts
The Moon has never had volcanic activity
