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    Second Grade
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    Unit test · Weeks 25–30 · 25–30 min · 32 points

    Science Unit 5 Test: Biodiversity & Interdependence

    Name Date

    Part 1: Ecosystems & Food Webs

    Use the pond food web table for questions 1 to 3.

    Living thingWhat it eats
    snailwater plants
    tadpolewater plants
    fishsnails and tadpoles
    heronfish
    1. Which living thing in this pond is a producer? How do you know?
    2. Draw one food chain from this pond. Start with the sun. Use arrows.
    3. If all the water plants died, which animals would lose their food first? What would happen to the heron later?
    4. Square 1 under a bush had 9 kinds of living things. Square 2 on a driveway had 2 kinds. Which square has more biodiversity? Why might that be?

    Part 2: Adaptations

    Think about how body features help animals survive.

    Paper square colorSquares found on the grass (out of 20)
    green4
    brown12
    white18
    1. Look at the camouflage hunt table. Which color was hardest to find on the grass? How does a color like that help an animal?
    2. A fennec fox lives in the hot desert. Its very big ears help it let out body heat. Is this an adaptation? Why?
    3. A hawk has a sharp, hooked beak. A hummingbird has a long, thin beak. Why are their beaks so different?
    4. An eagle and an ostrich both have feathers. An ostrich cannot fly. Which group do they both belong to?mammalsbirdsreptilesinsects

    Part 3: Life Cycles

    Rosa grew three bean plants in soil for two weeks. Use the table for questions 1 and 2.

    PlantWhereWatered?After two weeks
    Asunny windowyes12 cm, green, 6 leaves
    Bsunny windowno3 cm, drooping, brown leaves
    Cdark closetyes15 cm, pale yellow and thin
    1. Which plant grew best? What two things did it get?
    2. Plant C is the tallest, but it is pale and thin. What is it missing?
    3. Number these 1 to 4 to show how a bean plant grows and makes new seeds. ___ a bee carries pollen to the flower ___ the seed sprouts ___ a pod with new seeds grows ___ the plant grows leaves
    4. Why does an apple tree grow sweet fruit around its seeds?

    Part 4: Conservation

    Think about how people can protect habitats.

    Pond protectorTest 1Test 2Test 3
    mesh screen4 of 5 stopped5 of 5 stopped4 of 5 stopped
    craft stick fence2 of 5 stopped3 of 5 stopped1 of 5 stopped
    1. Two designs tried to keep litter out of a model pond. Find the total pieces each one stopped. Which design worked better?
    2. A park by a creek has litter on its banks. Name two things people can do to protect the creek habitat. Tell how each one helps the animals.