2nd Grade Science : 2nd Grade Science

Study concepts, example questions & explanations for 2nd Grade Science

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Example Questions

Example Question #41 : 2nd Grade Science

The image below is of a spiky seedpod often nicknamed a "hitchhiker" because it attached to clothing or an animal's fur and is dispersed through the environment.


Seedpod, Flower, Bokeh, Depth Of Field, Plant, Nature

Wanda is building a model of an animal that would help disperse these spiky seeds. Which animal should she design her model after to mimic the same effect?

Possible Answers:

Catfish

Alligator

Bear

Bald Eagle

Correct answer:

Bear

Explanation:

If a seed is a hitchhiker, it needs to attach to something to be carried around. If creating a model that mimics an animal that helps with this process, it must have the necessary features. Fish live underwater and are unlikely to come across these seeds. Scales are slick, so the seed would not attach as well to an alligator. Bald eagles primarily live in trees or high nests and eat meat. Fur or hair would be a more critical feature because it gives the seed something to get stuck to so it can be carried around so a bear would be the best animal to mimic.

Example Question #2 : Develop A Model Mimicking An Animal Dispersing Seeds

Animals cannot help disperse seeds unless they eat them.

Possible Answers:

False

True

Correct answer:

False

Explanation:

The statement in the question is false. There are more ways animals can disperse seeds than just eating them. Examples of animals dispersing seeds without eating them include seeds getting stuck to an animal's fur and carried around, animals may bury seeds and plant new trees accidentally, or pollinators carry pollen from flower to flower. Animals do spread seeds by eating them and then excreting them in a new location in their poo, but it isn't the only way.

Example Question #1 : Develop A Model Mimicking An Animal Pollinating Plants

What is pollination? Example: Pollination is an important part of the life cycle.

Possible Answers:

Littering or releasing chemicals into the environment

When a adult animal teaches a baby animal something

When caterpillars emerge from their cocoon

The transfer of pollen to create new plants

Correct answer:

The transfer of pollen to create new plants

Explanation:

Pollination is the transfer of pollen to new plants for fertilization. Bees, hummingbirds, and butterflies are just a few animals that help the pollination process. The animals go from plant to plant, spreading the pollen.

Example Question #1 : Develop A Model Mimicking An Animal Pollinating Plants

Miranda's teacher asked them to draw a model of an animal pollinating plants. Which of the following should she draw?

Possible Answers:

Butterfly

All of the animals are pollinators

Bat

Bee

Correct answer:

All of the animals are pollinators

Explanation:

If Miranda is drawing an animal that pollinates plants, she could draw any from the list; they are all pollinators! Bats, bees, and butterflies all move from flower to flower, spreading pollen to help fertilize plants so new ones can grow.

Example Question #2 : Develop A Model Mimicking An Animal Pollinating Plants

Hummingbirds pollinate tube-shaped flowers that have nectar and pollen. Their beak picks up pollen from one flower while they feed, and it is dropped into another flower when they move to the next plant to eat.

If humans wanted to use something that mimicked a hummingbird to pollinate their flowers, which item would be best?

Hummingbird, Flying, Feeding, Wildlife

Possible Answers:

A cup

A spoon

A straw

Your hand

Correct answer:

A straw

Explanation:

The best tool to use for mimicking a hummingbird's beak would be a straw. It is thin and can fit inside the tubular flowers to collect pollen or nectar. It could be moved easily from plant to plant for fertilization.

Example Question #3 : Develop A Model Mimicking An Animal Pollinating Plants

Michael is creating a model of an animal that pollinates plants. He knows that while the animal stops at a flower to eat, it gets covered in pollen. The pollen sticks to the animal as it flies to the next flower. There the powder is rubbed into the flower, and new material is picked up to be spread.

Which material would be best for building his animal to transport pollen?

Possible Answers:

Tinfoil

Paper

Felt

Plastic wrap

Correct answer:

Felt

Explanation:

Michael should select felt as the material to make his animal. Felt is soft, textured, and made of cloth so the pollen dust would stick to the fabric. Plastic wrap, tinfoil, and paper are all flat and slippery, so the pollen would not stick so it can be carried around.

Example Question #15 : Animal Effects On Plant Pollination

Heidi is making a model of a bumblebee for her pollinator project. She knows the bee moves from plant to plant spreading pollen dust, so what it is made of is very important. The pollen has to stick to the body so it can be flown around.

Which item would be right to use to mimic the body of a bumblebee?

Possible Answers:

Rock

Magnet

Golf ball

Cottonball

Correct answer:

Cottonball

Explanation:

The body of a bumblebee gets covered in pollen as it moves from flower to flower. The dust sticks to their soft, fuzzy hair. A cotton ball would be the best choice for a material that mimics the body of a bee. It is also fuzzy and soft, so dust will stick to it. A golf ball, rock, and magnet are smooth, and pollen dust would be less likely to hold.

Example Question #11 : Animal Effects On Plant Pollination

What does the term mimic mean? Example: I can use a straw to mimic the beak of a hummingbird.

Possible Answers:

Imitate, copy, or impersonate

A type of plant used to season food

Extremely small or tiny

The theatrical technique of moving silently

Correct answer:

Imitate, copy, or impersonate

Explanation:

To mimic means to copy, impersonate, or imitate something or someone. If I want to mimic the behavior of a hummingbird and model a tool that is similar to its beak, the straw would be a good fit. It is a similar shape, size, and has the same function. I could copy or mimic a hummingbird's actions and collect liquid.

Example Question #17 : Animal Effects On Plant Pollination

Andy's teacher asked them to draw a model of an animal pollinating plants. Which of the following should he draw?

Possible Answers:

Sunflower

Frog

Squirrel

Hummingbird

Correct answer:

Hummingbird

Explanation:

If Andy is drawing an animal that pollinates plants, he could model a hummingbird to represent the pollinator! Squirrels and frogs are not pollinators, and sunflowers are not an animal! Hummingbirds move from flower to flower, spreading pollen to help fertilize plants so new ones can grow.

Example Question #41 : Life Science

Bumblebees pollinate flowers that have nectar and pollen. The pollen from one flower sticks to them while they feed, and it is dropped into another flower when they move to the next plant to eat.

If humans wanted to use something that mimicked a bumblebee to pollinate their flowers, which item would be best?

Possible Answers:

Felt

All of the answers are correct

Tape

Velcro

Correct answer:

All of the answers are correct

Explanation:

To build a model of a bumblebee, a human could select felt, velcro, or tape as the material to make the animal. Felt is soft, textured, and made of cloth so the pollen dust would stick to the fabric. Velcro is textured, and things stick to it. The tape is very sticky, and pollen would attach itself to the sticky side to be carried around. All of the answer choices are correct and could be used to model a bumblebee.

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