About this Study Set
This study set covers Pre-Algebra through
19 practice questions.
This quiz tests pre-algebra knowledge using facts about animals, nature, and the environment. Every question includes the correct answer so you can learn as you go — pick any format above to get started.
Questions & Answers
Browse all 19 questions from the
Pre-Algebra: Nature's Numbers study set below.
Each question shows the correct answer — select a study format above to practice interactively.
1
The average lifespan of a giant panda is approximately 20 years in the wild. If a panda lives for 2 decades, how many years is that?
-
A
10 years
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B
20 years
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C
100 years
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D
200 years
2
A mature blue whale can weigh up to 150 tonnes. If 1 tonne is equal to 1000 kilograms, what is the maximum weight of a blue whale in kilograms?
-
A
150 kg
-
B
1,500 kg
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C
15,000 kg
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D
150,000 kg
3
The Amazon rainforest covers approximately 5.5 million square kilometers. If a small protected area within it is 5,500 square kilometers, what fraction of the total Amazon rainforest does this area represent?
-
A
1/10
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B
1/100
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C
1/1,000
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D
1/10,000
4
A typical monarch butterfly migrates up to 4,800 kilometers. If a butterfly travels at an average speed of 30 kilometers per hour, how many hours would it take to cover this distance?
-
A
16 hours
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B
160 hours
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C
1,600 hours
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D
16,000 hours
5
The Great Barrier Reef is approximately 2,300 kilometers long. If a segment of the reef is 1,150 kilometers, what percentage of the total length does this segment represent?
6
A single mature oak tree can absorb about 22 kilograms of carbon dioxide per year. To absorb 440 kilograms of carbon dioxide, how many such oak trees would be needed?
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A
10 trees
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B
20 trees
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C
22 trees
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D
44 trees
7
The average speed of a cheetah is about 100 kilometers per hour. If a cheetah runs for 0.25 hours, what distance does it cover?
-
A
25 km
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B
50 km
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C
75 km
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D
100 km
8
A droplet of water contains approximately 3.34 x 10^21 molecules. If scientists are studying 2 droplets, how many molecules are they studying in scientific notation?
-
A
3.34 x 10^21 molecules
-
B
6.68 x 10^21 molecules
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C
3.34 x 10^42 molecules
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D
6.68 x 10^42 molecules
9
The population of Emperor penguins on an island is estimated to be 200,000. If the population decreases by 10%, how many penguins are lost?
-
A
2,000 penguins
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B
10,000 penguins
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C
20,000 penguins
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D
180,000 penguins
10
A tidal wave can travel at speeds of up to 800 kilometers per hour. If a tidal wave travels for 3.5 hours, what distance does it cover?
-
A
280 km
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B
560 km
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C
2,800 km
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D
28,000 km
11
The average depth of the ocean is about 3,688 meters. If a submersible reaches a depth of 1,844 meters, what percentage of the average ocean depth has it reached?
12
A redwood tree can grow to a height of over 100 meters. If a redwood tree has grown 75% of its potential height, how tall is it?
-
A
75 meters
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B
80 meters
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C
85 meters
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D
90 meters
13
The human population is approximately 8 billion. If the wild tiger population is about 3,900, what is the ratio of humans to tigers?
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A
1:200,000
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B
2,000:1
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C
200,000:1
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D
8,000,000:1
14
A desert can experience extreme temperature fluctuations. If the daytime temperature is 45°C and the nighttime temperature is -5°C, what is the difference between the two temperatures?
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A
40°C
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B
45°C
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C
50°C
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D
55°C
15
The average rainfall in a rainforest is about 2,000 millimeters per year. If it rained 500 millimeters in one month, what fraction of the annual rainfall did it receive that month?
16
A group of wolves has a territory of 250 square kilometers. If they hunt an area that is 0.5 times their territory, how large is the hunting area?
-
A
100 sq km
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B
125 sq km
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C
150 sq km
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D
200 sq km
17
The speed of light in a vacuum is approximately 299,792 kilometers per second. Rounded to the nearest thousand, what is this speed?
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A
299,000 km/s
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B
300,000 km/s
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C
299,790 km/s
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D
299,800 km/s
18
A coral polyp reproduces by budding, and a new polyp grows. If a colony starts with 5 polyps and each polyp doubles every month, how many polyps will there be after 3 months?
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A
15 polyps
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B
20 polyps
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C
30 polyps
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D
40 polyps
19
The average time it takes for plastic to decompose is estimated to be around 450 years. If a plastic bottle is buried, what is the value of 450 expressed in hundreds?
