3rd Grade Science : Life Science

Study concepts, example questions & explanations for 3rd Grade Science

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Example Questions

Example Question #1 : Explain How Traits Are Influenced By The Environment

Cat A - She lives in a house with humans. They feed her daily, give her freshwater, and provide lots of toys for her to play with. Her humans let her sleep on the soft bed, takes her to the veterinarians, and pet her.

Cat B - She lives in the parking lot of a fast-food restaurant. She eats what she finds for scraps and drinks from puddles. She has never been to a vet and sleeps under the big tree in the back. She is terrified of humans.

What traits are influenced by the cats' environment?

Possible Answers:

All of the answer choices are correct.

The living environment influences the cats' comfort with people.

The living environment influences the cats' weight.

The living environment influences the cats' health.

Correct answer:

All of the answer choices are correct.

Explanation:

The environment influences a plant or animal's traits. Depending on the conditions that the animal or plant lives in, they will make adaptations to survive. These cats are living in very different situations, and this will impact the traits of the cats. Their weight, health, and comfort with people will all be affected by the conditions they live in. Cat A has access to food, clean water, medical care, and daily positive interactions with people, whereas Cat B is scared of people, eats scraps, and drinks dirty water. These different living situations will impact the cats' physical and behavioral traits.

Example Question #1 : Explain How Traits Are Influenced By The Environment

Cat A - She lives in a house with humans. They feed her daily, give her freshwater, and provide lots of toys for her to play with. Her humans let her sleep on the soft bed, takes her to the veterinarians, and pet her.

Cat B - She lives in the parking lot of a fast-food restaurant. She eats what she finds for scraps and drinks from puddles. She has never been to a vet and sleeps under the big tree in the back. She is terrified of humans.

How does the environment influence the cats' traits?

Possible Answers:

Their interactions with humans influence their behaviors with them

The type of water the cats drink influences their sleep patterns

The type of food the cats eat influences their toy preference

The location the cats live in influences their fur color

Correct answer:

Their interactions with humans influence their behaviors with them

Explanation:

The environment influences a plant or animal's traits. Depending on the conditions that the animal or plant lives in, they will make adaptations to survive. In the case of our cats, there is a difference in their behavior with humans. Cat A has access to humans daily and experiences positive interactions with them. Cat B is terrified of humans and has had limited interactions with them. Due to environmental factors, there is a difference in the behaviors of the cats.

Example Question #1 : Explain How Traits Are Influenced By The Environment

Farmer McGraw is new to growing corn, and this is his first season harvesting the crops. His friend Farmer Hill recommended planting the seeds about six inches apart to give them room for the roots to expand, but he wanted more corn, so he planted them two inches apart instead. He is realizing now that not many seeds seem to be germinating, and they are not sprouting plants every two inches apart as he had hoped.

What is the physical trait(s) of the plants being influenced by the environment?

Possible Answers:

The roots cannot expand to their full reach.

The plants did not receive any water, so they are withering and dying.

The stem cannot support the weight of the plant.

There is not enough sunlight, so the plants cannot make food.

Correct answer:

The roots cannot expand to their full reach.

Explanation:

Organisms are born with specific traits inherited from their parents, but the environment can influence them. Farmer McGraw planted his seeds to close together so the roots were restricted and could not grow to their full potential. He is going to have less yield than if he had listened to Farmer Hill because he will not have as many plants grow. The environment the seeds were planted in restricted their ability to grow appropriately.

Example Question #1 : Explain How Traits Are Influenced By The Environment

Which of the plant's traits were influenced by the environment based on the data table?

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Possible Answers:

Weight

Growth Rate

Height

Water Supply

Correct answer:

Height

Explanation:

The data table presents two wheat fields that received a different amount of water each day. The plant that received the least amount of water was the shortest. Based on this evidence, environmental factors have influenced the height of the plant. There is no mention of the plant's weight, growth rate, and the water supply is not a trait of the wheat plant.

Example Question #1 : Characteristics Among Species

Which plant does NOT have a trait variation that would give it a survival advantage?

Possible Answers:

Spur, Plant, Prickly, Nature, Thorns

Cactus, Green, Flower, Prickly, Color

Flower, Bloom, White, Summer, Daisy

Rose, Flowers, Nature, Love, Romantic

Correct answer:

Flower, Bloom, White, Summer, Daisy

Explanation:

The daisy does not have a trait variation that gives it a survival advantage. All of the other plants have a defense mechanism, thorns. The cactus, the rose, and the spurred bush all have spikey thorns on the stems to protect the plant from being eaten. This is a trait variation that gives it an advantage over other plants in the area that do not have a way to protect themselves.

Example Question #82 : 3rd Grade Science

Are all animals in a group the same? Why or why not?

Possible Answers:

No; All animals in a group are not the same because some develop trait variations.

No; All animals in a group are not the same because some like different things.

Yes; All animals are the same in a group because they have the same parents.

Yes; All animals are the same in a group because they are the same species.

Correct answer:

No; All animals in a group are not the same because some develop trait variations.

Explanation:

All animals in a group are not the same. Animals inherit traits from their parents as well as learn them based on observation and teaching. Over time animals' characteristics will vary depending on their conditions and survival needs. An animal may develop camouflage or other defense tactics to protect itself and keep it from being eaten. As demands for survival change, so do animal traits.

Example Question #2 : Characteristics Among Species

Which animal is demonstrating a trait that leads to a survival advantage?

Possible Answers:

Peacock, Peafowl, Pattern, Plumage

Owl, Camouflage, Wildlife, Bird Of Prey

Nature, Bird, Animal, Swan, Spring, Owl

Snake, Python, Boa Constrictor, Reptile

Correct answer:

Owl, Camouflage, Wildlife, Bird Of Prey

Explanation:

The animal that is demonstrating a trait that gives it a survival advantage is an owl. It is so well camouflaged with the tree that a predator is less likely to see it. Over time animals and plants will have variations in their traits that help them to survive in their specific conditions. The animals or plants that can adapt will outlive those who cannot.

Example Question #84 : 3rd Grade Science

Which answer choice best explains what the term variation means? Example: The moth's variation in color pattern helps it blend in with the bark.

Possible Answers:

The term variation means something that stays the same or constant.

The term variation means a change or difference in something.

The term variation means beautiful and fancy.

The term variation means something numerous or plentiful.

Correct answer:

The term variation means a change or difference in something.

Explanation:

The term variation refers to something that changes or is different. When there is a variation in color or pattern, like in the example, that means there is a change in the shade or design. Animals and plants may also have a variation in traits, which means that over time their characteristics may change or adapt to the environment they are living in to help them survive.

Example Question #85 : 3rd Grade Science

Explain how the cheetahs' variation in traits has given it a survival advantage above other animals.

Cheetah, Animal, Wildlife, Leopard

Possible Answers:

The cheetah hunts animals that no other predators want to eat.

The cheetah has very sharp claws that help it dig tunnels for hiding.

The cheetah is very attractive so other animals like it.

The cheetah can run very fast to catch its prey.

Correct answer:

The cheetah can run very fast to catch its prey.

Explanation:

The cheetah is just one of many predators in Africa, hunting for food daily. The cheetah has a variation in its traits that makes it unique and well suited for the environment it lives in and the prey it hunts. The cheetah has developed over many years the ability to run incredibly fast. When hunting gazelles and other fast land animals, the cheetah has to be able to outrun and catch the prey. These high speeds have helped the cheetah survive while other predators have not done so well.

Example Question #71 : Life Science

Plants and animals have variations in their physical and behavioral traits. How do these variations provide advantages to their survival?

 

Possible Answers:

Variations in traits allow plants and animals to adapt to changes in the environment to increase their survival chances.

Variations in traits allow plants and animals to adapt to changes to the environment.

Variations in traits allow plants and animals to adapt to changes in the environment to decrease their survival chances.

 

Variations in traits do not provide any advantage for the plant or animal.

Correct answer:

Variations in traits allow plants and animals to adapt to changes in the environment to increase their survival chances.

Explanation:

Traits can be learned or inherited and aid animals and plants in survival. Variations are changes or differences. A variation in a trait is a change or difference in the trait. As plants or animals need to adapt to changes in their environment, their characteristics may need to adjust as well. An example would be if insects or animals are eating a plant over many years, it may develop thorns or spikes to keep it from being eaten. This change in structure and traits give the plant a survival advantage.

 

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