Grade 2 Science Practice Test: Pollination and Seed Dispersal
- How Animals Help Plants
- 10 questions
- 13 minutes
Plants cannot walk, so they need help to move pollen and spread their seeds. These questions are about how animals, wind and water do that job.
Tap an option to mark your answer. You can change your mind, or tap the same option again to leave the question blank. The correct answers and explanations appear when you finish the test.Tap an option to answer; tap it again to leave the question blank.
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Question 1
What does a bee carry from flower to flower that helps plants make seeds?
Correct answer: D
Pollen sticks to a bee's fuzzy body. When the bee visits the next flower, some pollen rubs off, and the plant can make seeds.
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Question 2
A dog runs through a field. Later, prickly seeds called burrs are stuck in its fur.
How does this help the plant?
Correct answer: B
When the burrs fall off, they are far from the parent plant. That is how the plant spreads its seeds.
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Question 3
A bird eats berries. Later the seeds inside the berries drop to the ground far away in the bird's droppings.
What is the bird doing for the plant?
Correct answer: B
The seeds pass through the bird and land in a new place where they can grow. This is called seed dispersal.
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Question 4
A dandelion seed has a light, fluffy top like a tiny parachute. What most likely carries it away?
Correct answer: B
The fluffy top catches the air, so wind can blow the seed a long way. Bees carry pollen, not dandelion seeds.
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Question 5
A coconut can float. How can a coconut seed reach a new island?
Correct answer: C
A coconut is too heavy for wind or insects to carry, but it floats, so ocean water can carry it to another beach.
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Question 6
A squirrel buries acorns in the fall to eat later. It forgets where it buried some of them.
What may happen to the forgotten acorns?
Correct answer: A
An acorn is the seed of an oak tree. A buried acorn that is not eaten can sprout and grow into a new oak.
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Question 7
Why is it good for seeds to land away from the parent plant?
Correct answer: A
If every seed fell right under the parent, the young plants would have to share light and water with it. Spreading out gives them room.
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Question 8
Which animal helps pollinate flowers?
Correct answer: C
Hummingbirds drink nectar from flowers, and pollen sticks to their beaks and heads. They carry it to the next flower.
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Question 9
Ana makes a model. She rubs a fuzzy pipe cleaner on a paper flower that has yellow powder on it. Then she touches the pipe cleaner to a second paper flower.
What does the yellow powder stand for in her model?
Correct answer: A
The fuzzy pipe cleaner acts like a bee, and the powder moves from one flower to another just like pollen.
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Question 10
Why do many flowers have bright colors and a sweet smell?
Correct answer: D
Colors and smells invite bees, butterflies and birds to visit. When they come for nectar, they carry pollen between flowers.
Questions you leave blank are not counted as wrong.
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