1Question
A pond ecosystem gets 50 units of sunlight energy. If plants capture 2 units of that energy, how many units are not captured by the plants?
2Question
In a forest, 10 insects are eaten by a bird each day. How many insects are eaten in 3 days?
3Question
A rabbit eats 4 grams of grass each hour. How much grass does it eat in 5 hours?
4Question
A tree provides shelter for 8 birds. If 3 more birds arrive, how many birds are sheltered in total?
5Question
A lake has 12 fish. 5 more fish are added. How many fish are in the lake now?
6Question
A field has 6 plants in one section and 6 plants in another section. How many plants are there altogether?
7Question
A caterpillar eats 2 leaves per day. How many leaves does it eat in 7 days?
8Question
A meadow has 18 flowers. If 9 flowers are pollinated, how many are not pollinated yet?
9Question
A fox energy chain has 40 units at the producer level. If the producer loses 10 units before transfer, how many units remain?
10Question
A stream has 15 minnows. If the number doubles, how many minnows are there?
11Question
A deer herd grows from 20 to 25 deer. How many deer were added?
12Question
An ecosystem contains 3 groups of 7 frogs. How many frogs are there in total?
13Question
A bird nest is visited by 4 birds each morning for 6 mornings. How many bird visits are there?
14Question
A beehive has 36 bees. If 9 bees leave, how many bees remain?
15Question
A farmer plants 8 rows of seedlings with 5 seedlings in each row. How many seedlings are planted?
16Question
A food web has 3 prey animals eaten by each of 4 predators in one day. How many prey animals are eaten?
17Question
A marsh loses 6 grams of water each hour for 4 hours. How much water is lost in total?
18Question
A population of 50 algae increases by 10 each week. How many algae will there be after 3 weeks?
19Question
A forest has 100 units of energy at the producer level. If 10% is transferred to the next level, how many units are transferred?
20Question
A pond has 60 small fish. If 1/3 are eaten by larger fish, how many small fish are eaten?
21Question
A grassland starts with 80 grass plants. If 15 are eaten and 10 new plants grow, how many grass plants are there now?
22Question
A coral reef supports 5 groups of 12 fish. If 7 fish leave the reef, how many fish remain?
23Question
A teacher models energy flow in an ecosystem using 200 units at the plant level. If 20 units reach the herbivores and then 4 units reach the carnivores, how many total units reach the carnivores?
24Question
A wetlands study finds 3 species with 14, 16, and 18 animals each. How many animals are there in all three species?
25Question
An ecosystem has 90 insects. If the insect population decreases by 20% after a dry season, how many insects are left?