4th Grade Science : Life Science

Study concepts, example questions & explanations for 4th Grade Science

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Example Questions

Example Question #7 : Describe How Animals Receive Information

True or false: Animals’ use of their senses is not critical to their survival.

Possible Answers:

False

True

Correct answer:

False

Explanation:

Explanation: Most animals rely heavily on their senses to help them survive. The senses are how the majority of animals receive information about their surroundings. Their senses assist with hunting, reproducing, migration, and several other essential aspects of animal life. Without the senses, many animals could quickly find themselves struggling to survive.

Example Question #31 : Life Science

Coyotes are a species which has excellent vision and a strong sense of smell. To hunt more effectively, they form packs and use these features to locate and attack their prey. They can run up to 40 miles per hour and communicate with one another using a set of howls. These howls might warn of danger or can tell other coyotes their exact location. Coyotes are considered to be destructive but extremely smart animals.

Which of the following sets of features BEST describes how coyotes receive information?

Possible Answers:

Smell and speech

Vision and speech

Echolocation and vision

Smell and vision

Correct answer:

Smell and vision

Explanation:

The passage explains how coyotes use their senses of smell and sight to hunt their prey. Without these features, coyotes would not be considered formidable predators; however, with these senses combined with their pack mentality, they are. They rely heavily on these senses to receive information that helps them survive.

 

Example Question #1 : Describe How Animals Receive Information

Which of the following is NOT an example of a feature an animal may use to receive information about its surroundings?

Possible Answers:

Sight

Ears

Stomach

Whiskers

Correct answer:

Stomach

Explanation:

Animals have many different features that they use to receive information about their surroundings. For example, a cat can use its whiskers to determine whether its body would fit through a tight space. Moths use their sense of hearing to avoid being hunted by bats. Birds of prey have long-distance sight to be able to spot prey from far away.

Example Question #2 : Describe How Animals Receive Information

Jellyfish are unique animals in the sense that they don’t have bones, a brain, or a heart. What they do have rudimentary sensory nerves at the base of their tentacles, which allow them to see light, detect smells, and orient themselves. They do not intentionally sting people to attack because their nervous systems are extremely simple. Instead, the sting is intended to be both a defense mechanism against any creatures it may come into contact with, and also a way to capture potential prey.

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Which of the following features does a jellyfish use to receive its information?

Possible Answers:

Tentacles

Heart

Bones

Brain

Correct answer:

Tentacles

Explanation:

The passage describes how jellyfish are unique because they don’t have many of the features that most animals do have. However, they have tentacles that serve multiple purposes. They contain sensory nerves that allow jellyfish to see light, smell, and determine if an object is potential prey.

Example Question #1 : Argue That Plants Have Structures For Survival

Which structure on a plant aids in survival by absorbing water?

Possible Answers:

Petals

Roots

Leaves

Stem

Correct answer:

Roots

Explanation:

The plant has internal and external structures that aid in survival. The roots absorb water from the soil and keep the plant steady and stable, so it doesn't fall over. Without the roots, the plant would topple over and be dehydrated because of a lack of water.

Example Question #1 : Argue That Plants Have Structures For Survival

How do the leaves on a plant assist in its survival?

Possible Answers:

They allow pollination to take place.

They collect sunlight for photosynthesis.

They absorb water and nutrients.

They keep the plant steady and stable.

Correct answer:

They collect sunlight for photosynthesis.

Explanation:

The leaves on a plant are an external structure that assists in its survival. Without leaves, plants would not be able to make their food through the process of photosynthesis. The leaves absorb carbon dioxide and sunlight to turn into food for the plant. This structure is vital to a plant living and growing.

Example Question #3 : Argue That Plants Have Structures For Survival

How do flowers aid in a plant's survival?

Possible Answers:

They are the main structure for stabilizing the plant, so they aid in keeping it upright.

They are the main structure for beauty, so they aid in attracting not only pollinators but humans to planting them in gardens.

They are the main structure of photosynthesis, so they aid in creation of the plant's food.

They are the main structure for reproduction, so they aid in pollination to continue the development of new plants.

Correct answer:

They are the main structure for reproduction, so they aid in pollination to continue the development of new plants.

Explanation:

Flowers don't seem vital to a plant's survival, but they are an essential part of the process. They are the main structure for reproduction, so they aid in pollination to continue the development of new plants. Flower petals attract pollinators who then fertilize the plants, seeds are developed, and some plants produce fruits and vegetables, and pollinators are required for this process. Without the flower, all of these things would be impossible.

Example Question #1 : Plant And Animal Structures

Erik thinks that plants have structures to help keep them alive. His sister Maria disagrees with him and feels that only animals have structures to keep them alive.

Whose argument is correct, and why?

Possible Answers:

Maria is correct because plants do not have a structure like animals. Structures refer to internal organs like a heart or liver and plants do not have these types of features.

Erik is correct because structures mean roots, and plants have roots. Animals do not have roots, so his sister Maria cannot be right.

Erik is correct because plants have internal and external structures that keep them alive. An example is thorns; these spikes keep animals or insects from eating the plant.

Maria is correct because plants may have structures, but they are not living things like animals, so they cannot be compared with each other.

Correct answer:

Erik is correct because plants have internal and external structures that keep them alive. An example is thorns; these spikes keep animals or insects from eating the plant.

Explanation:

Erik is correct in his argument that plats have structures to keep them alive. Thorns, roots, leaves, flowers, and seeds are all examples of structures that plants have that keep them growing, reproducing, and living. Plants are living things that have adapted over the years to increase their rate of survival. If a plant has spines or spikes like thorns, something is less likely to eat it.

Example Question #5 : Argue That Plants Have Structures For Survival

Plants do not have structures that aid in their survival.

Possible Answers:

True

False

Correct answer:

False

Explanation:

This statement is false. Plants have many structures that are suited for survival. Leaves, roots, flowers, petals, stems, and seeds are all examples of a structure that a plant has that keeps it alive. Each feature plays a specific part in the plant's survival. Plants have adapted to their surroundings to have the best opportunity at life.

Example Question #2 : Plant And Animal Structures

Some plants have fibrous roots that branch in many different directions. These roots help the plants to absorb water quickly, while also holding them in the ground. In which of the following scenarios would fibrous roots serve as a structure for a plant’s survival?

Possible Answers:

A bolt of lightning strikes a tall tree

A hurricane ravages a beachfront

A forest fire overtakes a large area of land

A storm causes a river to crest and flood the surrounding area

Correct answer:

A storm causes a river to crest and flood the surrounding area

Explanation:

Because fibrous roots can help hold a plant in the ground, in the event of flooding, this root system would help anchor the plant in place, thus allowing it to survive. While these types of roots do enable plants to absorb water, this ability alone would not cause the plant to survive an event such as a forest fire, lightning strike, or hurricane.

 

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