Life Science - 2nd Grade Science

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Question

What does the term disperse mean? Example: Many animals help disperse the seeds of plants so new offspring can grow.

Answer

The term disperses means to spread or distribute over a wide area. Animals spread the seeds of plants over broad areas to help new plants begin their growth. These animals are vital to new plants being formed.

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Question

One way that seeds travel from place to place is through animal poo! Animals eat fruits, vegetables, and plants and then spread the seeds when they exit their bodies. If you were developing a model to mimic this type of animal, which animal would you choose?

Answer

Animals that spread seed through their excrement (or poo) have first to eat fruits, vegetables, or plants with seeds. Lions, eagles, and alligators are carnivores meaning they only eat meat, not plants. They would not pick up seeds through their diet so they cannot spread them through poo. Bears are omnivores meaning they eat plants and meat. Bears would be the type of animal that would spread seeds through their poo.

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Question

Some seeds are hitchhikers, which means they get stuck in an animal's fur and carried away when the animal moves. Coyotes, for example, travel long distances, and they don't even know they are dispersing seeds through the forest as they walk!

If you were making a model that mimicked an animal who carried hitchhikers, which feature would be most important for them to have?

Answer

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. Strong teeth and a tail are not very important to a hitchhiker's attachment or travel. Scales are slick, and the seed would not attach as well to an animal with this type of body covering. Fur or hair would be a more important feature because it gives the seed something to get stuck to so it can be carried around.

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Question

One way that animals disperse seeds is by collecting them. Animals like squirrels collect seeds to eat and store them away for later. Many times they bury the seeds and forget about them. They don't realize it, but they just planted a new bush, flower, or tree!

Ami has to design a model that mimics the way a squirrel disperses seeds. What is the most important feature her model must have?

Answer

The most crucial feature that Ami's model could have is the ability to dig. Squirrels collect seeds and then dig holes to store the food in until later, so the model must also be able to dig holes. The squirrels forget about the seeds, and plants begin to grow. Digging a hole and placing the seeds underground it something the model should be mimicking.

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Question

What does the term mimic mean? Example: I built a model to mimic an animal; it can dig just like a dog!

Answer

The term mimic means to copy or imitate someone or something. In the case of the example, the model mimics digging like a dog. This means the model is copying the way a dog can dig and doing it the same way.

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Question

Animals disperse (or spread) the seeds of plants they eat. Seeds exit the digestive system of a bat while they are flying around eating fruit from different plants. When the seeds land on the ground, new plants may be formed. How can humans mimic the bat and disperse seeds?

Answer

If humans want to develop a model for mimicking a bat dispersing seeds, the best answer choice would be to throw seeds out of a car window while driving. By tossing the seeds, it gives the change for a new plant to grow when they land in the dirt outside of the car. Humans can create models and devices to mimic animals that help keep new plants growing.

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Question

Which answer choice correctly uses the term mimic?

Answer

To mimic means to copy, impersonate, or imitate something or someone. "To mimic a butterfly pollinating flowers, I need to have wings and fly around." is the correct answer choice because it uses the word correctly. In the sentence, the author is trying to copy a butterfly pollinating flowers and would need wings to accomplish this. The other sentences use mimic incorrectly.

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Question

One way that seeds travel from place to place is through animal poo! How does animal poo help to transport seeds and allow new plants to grow?

Answer

Animals that spread seed through their excrement (or poo) have first to eat fruits, vegetables, or plants with seeds. Bears, bats, monkeys, and turtles would be the types of animals that would spread seeds through their poo. As they move around their environment, the seeds exit their digestive system and land in a new place. When this happens, the seeds are relocated and may form new plants where they land.

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Question

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?

Answer

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.

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Question

Animals cannot help disperse seeds unless they eat them.

Answer

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.

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Question

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

Answer

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.

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Question

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

Answer

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.

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Question

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

Answer

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.

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Question

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?

Answer

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.

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Question

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?

Answer

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.

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Question

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

Answer

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.

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Question

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

Answer

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.

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Question

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?

Answer

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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Question

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 the worst?

Hummingbird, Flying, Feeding, Wildlife

Answer

The items that would best be used to mimic an animal pollinating a flower would be the paintbrush, twig, or the straw. They would be thin enough to fit into the flower and have the end transfer or pick up the pollen. The sponge would be too broad and would not have the right materials for the dust to stick.

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Question

Bats are a common pollinator of plants. Many people are afraid of bats and think they are dangerous or even attack people! Bats are very helpful to humans because they help spread pollen from plant to plant. What feature do bats have that help them get from plant to plant to spread pollen?

Answer

Bats fly from plant to plant eatings fruit and picking up pollen as they move. When bats fly, they use their wings. When a bat lands on another plant, some of the powder falls off and is deposited into the stamen of the flower for reproduction. New plants are formed when this pollen is spread, and new seeds form.

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