3rd Grade Science : Life Science
Study concepts, example questions & explanations for 3rd Grade Science
All 3rd Grade Science Resources
Example Questions
Example Question #7 : Explain How Trait Variations Give Mating Advantages
For many species of male ducks, the birds that have the most ornate and colorful feathers are selected as a mate. The female birds are more muted in color. The females must sit on the nests to incubate their eggs, and the brown colors help them to blend in from predators. Also, male ducks are larger than the female ducks.
Which duck below would the female be most UNLIKELY to choose has her mate?
Female ducks usually choose the larger and more colorful male to be her mate because they are perceived to be the best choices. If they are large, it probably means they are good at finding food and can protect her and the ducklings. Ducks have a great sense of color so they can see which male has the most beautiful and healthy feathers. The female ducks want the best chance at their baby surviving, so they look for the most reliable genes to pass on. The biggest and most colorful ducks probably have these genes. The duck that the female would be least likely to pick has gray and brown muted feathers and is not ornate or brightly colored in any way. He is least likely to stand out to her.
Example Question #2 : Explain How Trait Variations Give Mating Advantages
Which trait variation would give an animal an advantage in finding a mate?
All of the answer choices are correct
A giraffe that is skilled at finding leaves
A female chicken who was good at caring for babies
A male eagle that is larger than the rest
All of the answer choices are correct
All of the answer choices are characteristics of the animal that would make it stand out as an exceptional mate. Each of the listed examples provides a trait that has become adapted in the gene pool that makes it an excellent choice for a mate. A large eagle is more likely to survive fights and find food making it ideal. A giraffe tat is skilled at locating leaves will help keep a family alive. A female chicken is charged with caring for young, so if she is a good mother, a male chicken may be more likely to select her as a mate. All of these are trait variations that give the animal an advantage.
Example Question #8 : Explain How Trait Variations Give Mating Advantages
Plants do not need to find mates, so they do not develop variations in their traits.
True
False
False
The statement is false and inaccurate. Plants do have trait variations that lead them to have advantages with attracting "mates." If a flower has more colorful petals, they are more likely to be selected for pollination. These advantages put them in a better position than other organisms. Plants don't attract mates in a traditional sense, but they still must attract pollinators to reproduce and create new plants.
Example Question #9 : Explain How Trait Variations Give Mating Advantages
What is a trait? Example: Male ducks develop brightly colored feathers. This trait helps them stand out to potential mates.
An ability to do something amazing
A distinguishing quality or characteristic
A delicious dessert or snack
A level of intelligence above all others
A distinguishing quality or characteristic
A trait is a quality, feature, or characteristic that stands out or makes something/someone distinguishable. In the example, the duck has brightly colored feathers. This allows him to stand out, and female ducks will be more likely to notice him. Traits can be physical, like the example or behavioral. They are passed down by parents to offspring.
Example Question #1 : Argue That In A Habitat Some Organisms Survive Well
Camels: Camels are desert animals that have pads on the bottom of their feet. The pads are thick and large and help keep the camel stable. They can close their noses to prevent materials from entering. Camels can eat desert plants to gather water. They can go up to 100 miles without needing to drink any water!
The Sahara Desert: The Sahara Desert is made entirely of sand. It rarely rains and is very dry. There are only a few plants, and they have small leaves. The sand is scorching and moves every time it is touched; when the wind blows, the sand shifts in all directions.
How well would a camel survive in the Sahara Desert compared to other organisms, and why?
A camel would not survive well in the Sahara Desert when compared to other organisms because its traits are adapted to different habitats.
A camel would survive very well in the Sahara Desert when compared to other organisms because it has traits adapted to this habitat.
There is not enough information to decide how a camel would survive.
A camel would survive less well in the Sahara Desert when compared to other organisms because some of its traits are not adapted to this habitat.
A camel would survive very well in the Sahara Desert when compared to other organisms because it has traits adapted to this habitat.
When reading the facts about the Sahara Desert and camels, it seems that the organism is perfectly adapted to the habitat. Camels have feet that can walk on the shifting, hot sand, can close their noses during a storm, can go long distances without water, and can eat the desert plants when needed. They have all of the traits or characteristics needed to survive well in a hot, sandy desert.
Example Question #1 : Effect Of Habitat On Organism Survival
Amazon Rainforest: In the Amazon Rainforest is rains almost every day. There are very tall trees that create a canopy, and the ground of the forest is covered in plants. The plants on the ground try to grow wide or tall to reach sunlight. The very tall trees can block much of the sunlight.
There is not enough information to decide how the bromeliad would survive.
The bromeliad would not grow very well in the Amazon Rainforest because its characteristics are not adapted for this type of habitat.
The bromeliad would grow less well in the Amazon Rainforest than other habitats because its characteristics are not well adapted for this type of habitat.
The bromeliad would grow very well in the Amazon Rainforest because its characteristics are adapted for this type of habitat.
The bromeliad would grow very well in the Amazon Rainforest because its characteristics are adapted for this type of habitat.
According to the information provided, the bromeliad would survive very well in the Amazon Rainforest. This plant has characteristics or traits that are adapted for survival in this type of environment. It needs a wet environment, and the rainforest receives rain daily. The plant is built like a cup or bowl for collecting water and grows around trees, which the rainforest has plenty of.
Example Question #1 : Argue That In A Habitat Some Organisms Survive Well
In a habitat, all organisms will continue to survive well despite any changes or relocations that may occur.
True
False
False
This statement is false. Not all organisms will continue to survive well in a habitat if some changes or relocations occur. If an animal is picked up and moved somewhere new, likely, it will not survive at all because it doesn't have the necessary traits to adapt. If a plant suddenly has no sunlight, it will not survive because it cannot make food, which is vital to life. Some organisms may survive well in a particular place, but the outcome may be different if they move or a change is made to the food chain.
Example Question #101 : 3rd Grade Science
Bromeliads grow on tree trunks and branches and wrap their roots around the trees. They need wet habitats to grow well. They have a center portion like a cup or bowl that collects water. Their leaves are waxy, and the water slides into the center. The leaves are long and curved to collect water.
Which habitat would allow a bromeliad to survive well, and why?
A swamp because it is wet, has lots of trees, and gets rain.
A desert because bromeliads like scorching places and this habitat is always hot.
A tundra because they are covered in ice, which is wet and has freezing cold temperatures.
A grassland because there are lots of open rolling meadows for the bromeliad to grow in.
A swamp because it is wet, has lots of trees, and gets rain.
The habitat that would allow a bromeliad to survive well is a swamp. Bromeliads need lots of water and a wet habitat to live in, a swamp provides this. They also grow by twisting around trees, and a swamp is filled with trees. A swamp would meet the needs of the plant.
Example Question #1 : Argue That In A Habitat Some Organisms Survive Well
Amazon Rainforest: In the Amazon Rainforest is rains almost every day. There are very tall trees that create a canopy, and the ground of the forest is covered in plants. The plants on the ground try to grow wide or tall to reach sunlight. The very tall trees can block much of the sunlight.
Natalie is correct. Bromeliads would not do well in the Amazon Rainforest habitat because they would receive too much water, not enough sunlight, and would not have an adequate place to live.
Both Natalie and Janine are partially correct. It depends on the plant and whether it feels like the Amazon Rainforest is where it wants to live.
Neither Natalie and Janine are correct with their explanations of why bromeliads would or would not do well in the Amazon Rainforest habitat.
Janine is correct. Bromeliads would do well in the rainforest because they are adapted to wet habitats, shaped to collect water, so they stay hydrated and grow on trees that are plentiful in the rainforest.
Janine is correct. Bromeliads would do well in the rainforest because they are adapted to wet habitats, shaped to collect water, so they stay hydrated and grow on trees that are plentiful in the rainforest.
In this specific argument, Janine is correct and supports her argument using relevant evidence from the passage. "Bromeliads would do well in the rainforest because they are adapted to wet habitats, shaped to collect water, so they stay hydrated and grow on trees that are plentiful in the rainforest." is a concise explanation as to why bromeliads would survive well in the Amazon Rainforest. Some organisms will survive well in an environment because they are adapted to the conditions in the area.
Example Question #3 : Argue That In A Habitat Some Organisms Survive Well
Which animal would survive well living in or around a freshwater lake?
A bass
A sea turtle
A stingray
A tuna fish
A bass
A bass would survive in a freshwater lake because it is a freshwater fish. A stingray, sea turtle, and tuna fish are all found in saltwater habitats and could not survive in a body of freshwater. The bass hunts other bugs and small fish that live in lakes, so it has a food source and the characteristics to survive well.
All 3rd Grade Science Resources
